diff options
Diffstat (limited to 'src/mesa/pipe/draw')
| -rw-r--r-- | src/mesa/pipe/draw/draw_clip.c | 456 | ||||
| -rw-r--r-- | src/mesa/pipe/draw/draw_context.c | 183 | ||||
| -rw-r--r-- | src/mesa/pipe/draw/draw_context.h | 74 | ||||
| -rw-r--r-- | src/mesa/pipe/draw/draw_cull.c | 130 | ||||
| -rw-r--r-- | src/mesa/pipe/draw/draw_flatshade.c | 155 | ||||
| -rw-r--r-- | src/mesa/pipe/draw/draw_offset.c | 166 | ||||
| -rw-r--r-- | src/mesa/pipe/draw/draw_private.h | 182 | ||||
| -rw-r--r-- | src/mesa/pipe/draw/draw_twoside.c | 158 | ||||
| -rw-r--r-- | src/mesa/pipe/draw/draw_unfilled.c | 178 | ||||
| -rw-r--r-- | src/mesa/pipe/draw/draw_vb.c | 722 |
10 files changed, 2404 insertions, 0 deletions
diff --git a/src/mesa/pipe/draw/draw_clip.c b/src/mesa/pipe/draw/draw_clip.c new file mode 100644 index 0000000000..b220cc3643 --- /dev/null +++ b/src/mesa/pipe/draw/draw_clip.c @@ -0,0 +1,456 @@ +/************************************************************************** + * + * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas. + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sub license, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice (including the + * next paragraph) shall be included in all copies or substantial portions + * of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. + * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR + * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, + * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE + * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + **************************************************************************/ + +/** + * \brief Clipping stage + * + * \author Keith Whitwell <keith@tungstengraphics.com> + */ + + +#include "main/macros.h" +#include "draw_private.h" + + +struct clipper { + struct draw_stage stage; /**< base class */ + + GLuint active_user_planes; + GLfloat (*plane)[4]; +}; + + +/* This is a bit confusing: + */ +static INLINE struct clipper *clipper_stage( struct draw_stage *stage ) +{ + return (struct clipper *)stage; +} + + +#define LINTERP(T, OUT, IN) ((OUT) + (T) * ((IN) - (OUT))) + + +/* All attributes are float[4], so this is easy: + */ +static void interp_attr( GLfloat *fdst, + GLfloat t, + const GLfloat *fin, + const GLfloat *fout ) +{ + fdst[0] = LINTERP( t, fout[0], fin[0] ); + fdst[1] = LINTERP( t, fout[1], fin[1] ); + fdst[2] = LINTERP( t, fout[2], fin[2] ); + fdst[3] = LINTERP( t, fout[3], fin[3] ); +} + + + + +/* Interpolate between two vertices to produce a third. + */ +static void interp( const struct clipper *clip, + struct vertex_header *dst, + GLfloat t, + const struct vertex_header *out, + const struct vertex_header *in ) +{ + const GLuint nr_attrs = clip->stage.draw->nr_attrs; + GLuint j; + + /* Vertex header. + */ + { + dst->clipmask = 0; + dst->edgeflag = 0; + dst->pad = 0; + } + + /* Clip coordinates: interpolate normally + */ + { + interp_attr(dst->clip, t, in->clip, out->clip); + } + + /* Do the projective divide and insert window coordinates: + */ + { + const GLfloat *pos = dst->clip; + const GLfloat *scale = clip->stage.draw->viewport.scale; + const GLfloat *trans = clip->stage.draw->viewport.translate; + const GLfloat oow = 1.0 / pos[3]; + + dst->data[0][0] = pos[0] * oow * scale[0] + trans[0]; + dst->data[0][1] = pos[1] * oow * scale[1] + trans[1]; + dst->data[0][2] = pos[2] * oow * scale[2] + trans[2]; + dst->data[0][3] = oow; + } + + /* Other attributes + * Note: start at 1 to skip winpos (data[0]) since we just computed + * it above. + * Subtract two from nr_attrs since the first two attribs (always + * VF_ATTRIB_VERTEX_HEADER and VF_ATTRIB_CLIP_POS, see + * draw_set_vertex_attributes()) are in the vertex_header struct, + * not in the data[] array. + */ + for (j = 1; j < nr_attrs - 2; j++) { + interp_attr(dst->data[j], t, in->data[j], out->data[j]); + } +} + + +#define CLIP_USER_BIT 0x40 +#define CLIP_CULL_BIT 0x80 + + +static INLINE GLfloat dot4( const GLfloat *a, + const GLfloat *b ) +{ + GLfloat result = (a[0]*b[0] + + a[1]*b[1] + + a[2]*b[2] + + a[3]*b[3]); + + return result; +} + + +#if 0 +static INLINE void do_tri( struct draw_stage *next, + struct prim_header *header ) +{ + GLuint i; + for (i = 0; i < 3; i++) { + GLfloat *ndc = header->v[i]->data[0]; + _mesa_printf("ndc %f %f %f\n", ndc[0], ndc[1], ndc[2]); + assert(ndc[0] >= -1 && ndc[0] <= 641); + assert(ndc[1] >= 30 && ndc[1] <= 481); + } + _mesa_printf("\n"); + next->tri(next, header); +} +#endif + + +static void emit_poly( struct draw_stage *stage, + struct vertex_header **inlist, + GLuint n ) +{ + struct prim_header header; + GLuint i; + + for (i = 2; i < n; i++) { + header.v[0] = inlist[0]; + header.v[1] = inlist[i-1]; + header.v[2] = inlist[i]; + + { + GLuint tmp0 = header.v[0]->edgeflag; + GLuint tmp2 = header.v[2]->edgeflag; + + if (i != 2) header.v[0]->edgeflag = 0; + if (i != n-1) header.v[2]->edgeflag = 0; + + stage->next->tri( stage->next, &header ); + + header.v[0]->edgeflag = tmp0; + header.v[2]->edgeflag = tmp2; + } + } +} + + +#if 0 +static void emit_poly( struct draw_stage *stage ) +{ + GLuint i; + + for (i = 2; i < n; i++) { + header->v[0] = inlist[0]; + header->v[1] = inlist[i-1]; + header->v[2] = inlist[i]; + + stage->next->tri( stage->next, header ); + } +} +#endif + + +/* Clip a triangle against the viewport and user clip planes. + */ +static void +do_clip_tri( struct draw_stage *stage, + struct prim_header *header, + GLuint clipmask ) +{ + struct clipper *clipper = clipper_stage( stage ); + struct vertex_header *a[MAX_CLIPPED_VERTICES]; + struct vertex_header *b[MAX_CLIPPED_VERTICES]; + struct vertex_header **inlist = a; + struct vertex_header **outlist = b; + GLuint tmpnr = 0; + GLuint n = 3; + GLuint i; + + inlist[0] = header->v[0]; + inlist[1] = header->v[1]; + inlist[2] = header->v[2]; + + /* XXX: Note stupid hack to deal with tnl's 8-bit clipmask. Remove + * this once we correctly use 16bit masks for userclip planes. + */ + clipmask &= ~CLIP_CULL_BIT; + if (clipmask & CLIP_USER_BIT) { + clipmask &= ~CLIP_USER_BIT; + clipmask |= clipper->active_user_planes; + } + + while (clipmask && n >= 3) { + GLuint plane_idx = ffs(clipmask)-1; + const GLfloat *plane = clipper->plane[plane_idx]; + struct vertex_header *vert_prev = inlist[0]; + GLfloat dp_prev = dot4( vert_prev->clip, plane ); + GLuint outcount = 0; + + clipmask &= ~(1<<plane_idx); + + inlist[n] = inlist[0]; /* prevent rotation of vertices */ + + for (i = 1; i <= n; i++) { + struct vertex_header *vert = inlist[i]; + + GLfloat dp = dot4( vert->clip, plane ); + + if (!IS_NEGATIVE(dp_prev)) { + outlist[outcount++] = vert_prev; + } + + if (DIFFERENT_SIGNS(dp, dp_prev)) { + struct vertex_header *new_vert = clipper->stage.tmp[tmpnr++]; + outlist[outcount++] = new_vert; + + if (IS_NEGATIVE(dp)) { + /* Going out of bounds. Avoid division by zero as we + * know dp != dp_prev from DIFFERENT_SIGNS, above. + */ + GLfloat t = dp / (dp - dp_prev); + interp( clipper, new_vert, t, vert, vert_prev ); + + /* Force edgeflag true in this case: + */ + new_vert->edgeflag = 1; + } else { + /* Coming back in. + */ + GLfloat t = dp_prev / (dp_prev - dp); + interp( clipper, new_vert, t, vert_prev, vert ); + + /* Copy starting vert's edgeflag: + */ + new_vert->edgeflag = vert_prev->edgeflag; + } + } + + vert_prev = vert; + dp_prev = dp; + } + + { + struct vertex_header **tmp = inlist; + inlist = outlist; + outlist = tmp; + n = outcount; + } + } + + /* Emit the polygon as triangles to the setup stage: + */ + if (n >= 3) + emit_poly( stage, inlist, n ); +} + + +/* Clip a line against the viewport and user clip planes. + */ +static void +do_clip_line( struct draw_stage *stage, + struct prim_header *header, + GLuint clipmask ) +{ + const struct clipper *clipper = clipper_stage( stage ); + struct vertex_header *v0 = header->v[0]; + struct vertex_header *v1 = header->v[1]; + const GLfloat *pos0 = v0->clip; + const GLfloat *pos1 = v1->clip; + GLfloat t0 = 0; + GLfloat t1 = 0; + struct prim_header newprim; + + /* XXX: Note stupid hack to deal with tnl's 8-bit clipmask. Remove + * this once we correctly use 16bit masks for userclip planes. + */ + clipmask &= ~CLIP_CULL_BIT; + if (clipmask & CLIP_USER_BIT) { + clipmask &= ~CLIP_USER_BIT; + clipmask |= clipper->active_user_planes; + } + + while (clipmask) { + const GLuint plane_idx = ffs(clipmask)-1; + const GLfloat *plane = clipper->plane[plane_idx]; + const GLfloat dp0 = dot4( pos0, plane ); + const GLfloat dp1 = dot4( pos1, plane ); + + if (dp1 < 0) { + GLfloat t = dp1 / (dp1 - dp0); + t1 = MAX2(t1, t); + } + + if (dp0 < 0) { + GLfloat t = dp0 / (dp0 - dp1); + t0 = MAX2(t0, t); + } + + if (t0 + t1 >= 1.0) + return; /* discard */ + + clipmask &= ~(1 << plane_idx); /* turn off this plane's bit */ + } + + if (v0->clipmask) { + interp( clipper, stage->tmp[0], t0, v0, v1 ); + newprim.v[0] = stage->tmp[0]; + } + else { + newprim.v[0] = v0; + } + + if (v1->clipmask) { + interp( clipper, stage->tmp[1], t1, v1, v0 ); + newprim.v[1] = stage->tmp[1]; + } + else { + newprim.v[1] = v1; + } + + stage->next->line( stage->next, &newprim ); +} + + +static void clip_begin( struct draw_stage *stage ) +{ + struct clipper *clipper = clipper_stage(stage); + GLuint nr = stage->draw->nr_planes; + + /* sanity checks. If these fail, review the clip/interp code! */ + assert(stage->draw->nr_attrs >= 3); + assert(stage->draw->attrs[0].attrib == VF_ATTRIB_VERTEX_HEADER); + assert(stage->draw->attrs[1].attrib == VF_ATTRIB_CLIP_POS); + + /* Hacky bitmask to use when we hit CLIP_USER_BIT: + */ + clipper->active_user_planes = ((1<<nr)-1) & ~((1<<6)-1); + + stage->next->begin( stage->next ); +} + + +static void +clip_point( struct draw_stage *stage, + struct prim_header *header ) +{ + if (header->v[0]->clipmask == 0) + stage->next->point( stage->next, header ); +} + + +static void +clip_line( struct draw_stage *stage, + struct prim_header *header ) +{ + GLuint clipmask = (header->v[0]->clipmask | + header->v[1]->clipmask); + + if (clipmask == 0) { + /* no clipping needed */ + stage->next->line( stage->next, header ); + } + else if ((header->v[0]->clipmask & + header->v[1]->clipmask) == 0) { + do_clip_line(stage, header, clipmask); + } +} + + +static void +clip_tri( struct draw_stage *stage, + struct prim_header *header ) +{ + GLuint clipmask = (header->v[0]->clipmask | + header->v[1]->clipmask | + header->v[2]->clipmask); + + if (clipmask == 0) { + /* no clipping needed */ + stage->next->tri( stage->next, header ); + } + else if ((header->v[0]->clipmask & + header->v[1]->clipmask & + header->v[2]->clipmask) == 0) { + do_clip_tri(stage, header, clipmask); + } +} + + +static void clip_end( struct draw_stage *stage ) +{ + stage->next->end( stage->next ); +} + + +/** + * Allocate a new clipper stage. + * \return pointer to new stage object + */ +struct draw_stage *draw_clip_stage( struct draw_context *draw ) +{ + struct clipper *clipper = CALLOC_STRUCT(clipper); + + draw_alloc_tmps( &clipper->stage, MAX_CLIPPED_VERTICES ); + + clipper->stage.draw = draw; + clipper->stage.begin = clip_begin; + clipper->stage.point = clip_point; + clipper->stage.line = clip_line; + clipper->stage.tri = clip_tri; + clipper->stage.end = clip_end; + + clipper->plane = draw->plane; + + return &clipper->stage; +} diff --git a/src/mesa/pipe/draw/draw_context.c b/src/mesa/pipe/draw/draw_context.c new file mode 100644 index 0000000000..a97f488387 --- /dev/null +++ b/src/mesa/pipe/draw/draw_context.c @@ -0,0 +1,183 @@ +/************************************************************************** + * + * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas. + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sub license, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice (including the + * next paragraph) shall be included in all copies or substantial portions + * of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. + * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR + * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, + * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE + * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + **************************************************************************/ + + /* + * Authors: + * Keith Whitwell <keith@tungstengraphics.com> + */ + +#include "imports.h" +#include "macros.h" + +#include "draw_context.h" +#include "draw_private.h" + + +struct draw_context *draw_create( void ) +{ + struct draw_context *draw = CALLOC_STRUCT( draw_context ); + + /* create pipeline stages */ + draw->pipeline.unfilled = draw_unfilled_stage( draw ); + draw->pipeline.twoside = draw_twoside_stage( draw ); + draw->pipeline.offset = draw_offset_stage( draw ); + draw->pipeline.clip = draw_clip_stage( draw ); + draw->pipeline.flatshade = draw_flatshade_stage( draw ); + draw->pipeline.cull = draw_cull_stage( draw ); + + ASSIGN_4V( draw->plane[0], -1, 0, 0, 1 ); + ASSIGN_4V( draw->plane[1], 1, 0, 0, 1 ); + ASSIGN_4V( draw->plane[2], 0, -1, 0, 1 ); + ASSIGN_4V( draw->plane[3], 0, 1, 0, 1 ); + ASSIGN_4V( draw->plane[4], 0, 0, 1, 1 ); /* yes these are correct */ + ASSIGN_4V( draw->plane[5], 0, 0, -1, 1 ); /* mesa's a bit wonky */ + draw->nr_planes = 6; + + draw->vf = vf_create( GL_TRUE ); + + return draw; +} + + +void draw_destroy( struct draw_context *draw ) +{ + if (draw->header.storage) + ALIGN_FREE( draw->header.storage ); + + vf_destroy( draw->vf ); + + FREE( draw ); +} + + +/** + * Rebuild the rendering pipeline. + */ +static void validate_pipeline( struct draw_context *draw ) +{ + struct draw_stage *next = draw->pipeline.setup; + + /* + * NOTE: we build up the pipeline in end-to-start order. + * + * TODO: make the current primitive part of the state and build + * shorter pipelines for lines & points. + */ + + if (draw->setup.fill_cw != PIPE_POLYGON_MODE_FILL || + draw->setup.fill_ccw != PIPE_POLYGON_MODE_FILL) { + draw->pipeline.unfilled->next = next; + next = draw->pipeline.unfilled; + } + + if (draw->setup.offset_cw || + draw->setup.offset_ccw) { + draw->pipeline.offset->next = next; + next = draw->pipeline.offset; + } + + if (draw->setup.light_twoside) { + draw->pipeline.twoside->next = next; + next = draw->pipeline.twoside; + } + + /* Always run the cull stage as we calculate determinant there + * also. Fix this.. + */ + { + draw->pipeline.cull->next = next; + next = draw->pipeline.cull; + } + + /* Clip stage + */ + { + draw->pipeline.clip->next = next; + next = draw->pipeline.clip; + } + + /* Do software flatshading prior to clipping. XXX: should only do + * this for clipped primitives, ie it is a part of the clip + * routine. + */ + if (draw->setup.flatshade) { + draw->pipeline.flatshade->next = next; + next = draw->pipeline.flatshade; + } + + draw->pipeline.first = next; +} + + +/** + * Register new primitive setup/rendering state. + * This causes the drawing pipeline to be rebuilt. + */ +void draw_set_setup_state( struct draw_context *draw, + const struct pipe_setup_state *setup ) +{ + memcpy( &draw->setup, setup, sizeof(*setup) ); + validate_pipeline( draw ); +} + + +/** + * Plug in the primitive rendering/rasterization stage. + * This is provided by the device driver. + */ +void draw_set_setup_stage( struct draw_context *draw, + struct draw_stage *stage ) +{ + draw->pipeline.setup = stage; +} + + +/** + * Set the draw module's clipping state. + */ +void draw_set_clip_state( struct draw_context *draw, + const struct pipe_clip_state *clip ) +{ + memcpy(&draw->plane[6], clip->ucp, clip->nr * sizeof(clip->ucp[0])); + draw->nr_planes = 6 + clip->nr; +} + + +/** + * Set the draw module's viewport state. + */ +void draw_set_viewport_state( struct draw_context *draw, + const struct pipe_viewport_state *viewport ) +{ + draw->viewport = *viewport; /* struct copy */ + + vf_set_vp_scale_translate( draw->vf, viewport->scale, viewport->translate ); + + /* Using tnl/ and vf/ modules is temporary while getting started. + * Full pipe will have vertex shader, vertex fetch of its own. + */ +} diff --git a/src/mesa/pipe/draw/draw_context.h b/src/mesa/pipe/draw/draw_context.h new file mode 100644 index 0000000000..c298d4f46d --- /dev/null +++ b/src/mesa/pipe/draw/draw_context.h @@ -0,0 +1,74 @@ + +/************************************************************************** + * + * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas. + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sub license, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice (including the + * next paragraph) shall be included in all copies or substantial portions + * of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. + * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR + * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, + * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE + * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + **************************************************************************/ + +/** + * \brief Public interface into the drawing module. + */ + +/* Authors: Keith Whitwell <keith@tungstengraphics.com> + */ + + +#ifndef DRAW_CONTEXT_H +#define DRAW_CONTEXT_H + + +#include "glheader.h" +#include "pipe/p_state.h" + + +struct vertex_buffer; +struct draw_context; +struct draw_stage; + + +struct draw_context *draw_create( void ); + +void draw_destroy( struct draw_context *draw ); + +void draw_set_viewport_state( struct draw_context *draw, + const struct pipe_viewport_state *viewport ); + +void draw_set_clip_state( struct draw_context *pipe, + const struct pipe_clip_state *clip ); + +void draw_set_setup_state( struct draw_context *draw, + const struct pipe_setup_state *setup ); + +void draw_set_setup_stage( struct draw_context *draw, + struct draw_stage *stage ); + +void draw_set_vertex_attributes( struct draw_context *draw, + const GLuint *attrs, + GLuint nr_attrs ); + +void draw_vb(struct draw_context *draw, + struct vertex_buffer *VB ); + + +#endif /* DRAW_CONTEXT_H */ diff --git a/src/mesa/pipe/draw/draw_cull.c b/src/mesa/pipe/draw/draw_cull.c new file mode 100644 index 0000000000..863686f150 --- /dev/null +++ b/src/mesa/pipe/draw/draw_cull.c @@ -0,0 +1,130 @@ +/************************************************************************** + * + * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas. + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sub license, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice (including the + * next paragraph) shall be included in all copies or substantial portions + * of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. + * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR + * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, + * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE + * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + **************************************************************************/ + +/** + * \brief Drawing stage for polygon culling + */ + +/* Authors: Keith Whitwell <keith@tungstengraphics.com> + */ + + +#include "main/imports.h" +#include "pipe/p_defines.h" +#include "draw_private.h" + + +struct cull_stage { + struct draw_stage stage; + GLuint mode; /**< one of PIPE_WINDING_x */ +}; + + +static INLINE struct cull_stage *cull_stage( struct draw_stage *stage ) +{ + return (struct cull_stage *)stage; +} + + +static void cull_begin( struct draw_stage *stage ) +{ + struct cull_stage *cull = cull_stage(stage); + + cull->mode = stage->draw->setup.cull_mode; + + stage->next->begin( stage->next ); +} + + +static void cull_tri( struct draw_stage *stage, + struct prim_header *header ) +{ + /* Window coords: */ + const GLfloat *v0 = header->v[0]->data[0]; + const GLfloat *v1 = header->v[1]->data[0]; + const GLfloat *v2 = header->v[2]->data[0]; + + /* edge vectors e = v0 - v2, f = v1 - v2 */ + GLfloat ex = v0[0] - v2[0]; + GLfloat ey = v0[1] - v2[1]; + GLfloat fx = v1[0] - v2[0]; + GLfloat fy = v1[1] - v2[1]; + + /* det = cross(e,f).z */ + header->det = ex * fy - ey * fx; + + if (header->det != 0) { + /* non-zero area */ + GLuint mode = (header->det > 0) ? PIPE_WINDING_CW : PIPE_WINDING_CCW; + + if ((mode & cull_stage(stage)->mode) == 0) { + /* triangle is not culled, pass to next stage */ + stage->next->tri( stage->next, header ); + } + } +} + + +static void cull_line( struct draw_stage *stage, + struct prim_header *header ) +{ + stage->next->line( stage->next, header ); +} + + +static void cull_point( struct draw_stage *stage, + struct prim_header *header ) +{ + stage->next->point( stage->next, header ); +} + + +static void cull_end( struct draw_stage *stage ) +{ + stage->next->end( stage->next ); +} + + +/** + * Create a new polygon culling stage. + */ +struct draw_stage *draw_cull_stage( struct draw_context *draw ) +{ + struct cull_stage *cull = CALLOC_STRUCT(cull_stage); + + draw_alloc_tmps( &cull->stage, 0 ); + + cull->stage.draw = draw; + cull->stage.next = NULL; + cull->stage.begin = cull_begin; + cull->stage.point = cull_point; + cull->stage.line = cull_line; + cull->stage.tri = cull_tri; + cull->stage.end = cull_end; + + return &cull->stage; +} diff --git a/src/mesa/pipe/draw/draw_flatshade.c b/src/mesa/pipe/draw/draw_flatshade.c new file mode 100644 index 0000000000..09547865fa --- /dev/null +++ b/src/mesa/pipe/draw/draw_flatshade.c @@ -0,0 +1,155 @@ +/************************************************************************** + * + * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas. + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sub license, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice (including the + * next paragraph) shall be included in all copies or substantial portions + * of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. + * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR + * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, + * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE + * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + **************************************************************************/ + +/* Authors: Keith Whitwell <keith@tungstengraphics.com> + */ + +#include "main/imports.h" +#include "draw_private.h" + + +struct flatshade_stage { + struct draw_stage stage; + + const GLuint *lookup; +}; + + + +static INLINE struct flatshade_stage *flatshade_stage( struct draw_stage *stage ) +{ + return (struct flatshade_stage *)stage; +} + + +static void flatshade_begin( struct draw_stage *stage ) +{ + stage->next->begin( stage->next ); +} + + + +static INLINE void copy_attr( GLuint attr, + struct vertex_header *dst, + const struct vertex_header *src ) +{ + if (attr) { + memcpy( dst->data[attr], + src->data[attr], + sizeof(src->data[0]) ); + } +} + + +static INLINE void copy_colors( struct draw_stage *stage, + struct vertex_header *dst, + const struct vertex_header *src ) +{ + const struct flatshade_stage *flatshade = flatshade_stage(stage); + const GLuint *lookup = flatshade->lookup; + + copy_attr( lookup[VF_ATTRIB_COLOR0], dst, src ); + copy_attr( lookup[VF_ATTRIB_COLOR1], dst, src ); + copy_attr( lookup[VF_ATTRIB_BFC0], dst, src ); + copy_attr( lookup[VF_ATTRIB_BFC1], dst, src ); +} + + +/** + * Flatshade tri. Required for clipping and when unfilled tris are + * active, otherwise handled by hardware. + */ +static void flatshade_tri( struct draw_stage *stage, + struct prim_header *header ) +{ + struct prim_header tmp; + + tmp.det = header->det; + tmp.v[0] = dup_vert(stage, header->v[0], 0); + tmp.v[1] = dup_vert(stage, header->v[1], 1); + tmp.v[2] = header->v[2]; + + copy_colors(stage, tmp.v[0], tmp.v[2]); + copy_colors(stage, tmp.v[1], tmp.v[2]); + + stage->next->tri( stage->next, &tmp ); +} + + +/** + * Flatshade line. Required for clipping. + */ +static void flatshade_line( struct draw_stage *stage, + struct prim_header *header ) +{ + struct prim_header tmp; + + tmp.v[0] = dup_vert(stage, header->v[0], 0); + tmp.v[1] = header->v[1]; + + copy_colors(stage, tmp.v[0], tmp.v[1]); + + stage->next->line( stage->next, &tmp ); +} + + +static void flatshade_point( struct draw_stage *stage, + struct prim_header *header ) +{ + stage->next->point( stage->next, header ); +} + + +static void flatshade_end( struct draw_stage *stage ) +{ + stage->next->end( stage->next ); +} + + +/** + * Create flatshading drawing stage. + */ +struct draw_stage *draw_flatshade_stage( struct draw_context *draw ) +{ + struct flatshade_stage *flatshade = CALLOC_STRUCT(flatshade_stage); + + draw_alloc_tmps( &flatshade->stage, 2 ); + + flatshade->stage.draw = draw; + flatshade->stage.next = NULL; + flatshade->stage.begin = flatshade_begin; + flatshade->stage.point = flatshade_point; + flatshade->stage.line = flatshade_line; + flatshade->stage.tri = flatshade_tri; + flatshade->stage.end = flatshade_end; + + flatshade->lookup = draw->vf_attr_to_slot; + + return &flatshade->stage; +} + + diff --git a/src/mesa/pipe/draw/draw_offset.c b/src/mesa/pipe/draw/draw_offset.c new file mode 100644 index 0000000000..1a7f56d0c5 --- /dev/null +++ b/src/mesa/pipe/draw/draw_offset.c @@ -0,0 +1,166 @@ +/************************************************************************** + * + * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas. + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sub license, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice (including the + * next paragraph) shall be included in all copies or substantial portions + * of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. + * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR + * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, + * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE + * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + **************************************************************************/ + +/** + * \brief polygon offset state + * + * \author Keith Whitwell <keith@tungstengraphics.com> + * \author Brian Paul + */ + +#include "main/imports.h" +#include "main/macros.h" +#include "draw_private.h" + + + +struct offset_stage { + struct draw_stage stage; + + GLfloat scale; + GLfloat units; +}; + + + +static INLINE struct offset_stage *offset_stage( struct draw_stage *stage ) +{ + return (struct offset_stage *) stage; +} + + +static void offset_begin( struct draw_stage *stage ) +{ + struct offset_stage *offset = offset_stage(stage); + GLfloat mrd = 1.0 / 65535.0; /* XXX this depends on depthbuffer bits! */ + + offset->units = stage->draw->setup.offset_units * mrd; + offset->scale = stage->draw->setup.offset_scale; + + stage->next->begin( stage->next ); +} + + +/** + * Offset tri Z. Some hardware can handle this, but not usually when + * doing unfilled rendering. + */ +static void do_offset_tri( struct draw_stage *stage, + struct prim_header *header ) +{ + struct offset_stage *offset = offset_stage(stage); + GLfloat inv_det = 1.0 / header->det; + + /* Window coords: + */ + GLfloat *v0 = header->v[0]->data[0]; + GLfloat *v1 = header->v[1]->data[0]; + GLfloat *v2 = header->v[2]->data[0]; + + /* edge vectors e = v0 - v2, f = v1 - v2 */ + GLfloat ex = v0[0] - v2[0]; + GLfloat ey = v0[1] - v2[1]; + GLfloat ez = v0[2] - v2[2]; + GLfloat fx = v1[0] - v2[0]; + GLfloat fy = v1[1] - v2[1]; + GLfloat fz = v1[2] - v2[2]; + + /* (a,b) = cross(e,f).xy */ + GLfloat a = ey*fz - ez*fy; + GLfloat b = ez*fx - ex*fz; + + GLfloat dzdx = FABSF(a * inv_det); + GLfloat dzdy = FABSF(b * inv_det); + + GLfloat zoffset = offset->units + MAX2(dzdx, dzdy) * offset->scale; + + /* + * Note: we're applying the offset and clamping per-vertex. + * Ideally, the offset is applied per-fragment prior to fragment shading. + */ + v0[2] = CLAMP(v0[2] + zoffset, 0.0, 1.0); + v1[2] = CLAMP(v1[2] + zoffset, 0.0, 1.0); + v2[2] = CLAMP(v2[2] + zoffset, 0.0, 1.0); + + stage->next->tri( stage->next, header ); +} + + +static void offset_tri( struct draw_stage *stage, + struct prim_header *header ) +{ + struct prim_header tmp; + + tmp.det = header->det; + tmp.v[0] = dup_vert(stage, header->v[0], 0); + tmp.v[1] = dup_vert(stage, header->v[1], 1); + tmp.v[2] = dup_vert(stage, header->v[2], 2); + + do_offset_tri( stage, &tmp ); +} + + + +static void offset_line( struct draw_stage *stage, + struct prim_header *header ) +{ + stage->next->line( stage->next, header ); +} + + +static void offset_point( struct draw_stage *stage, + struct prim_header *header ) +{ + stage->next->point( stage->next, header ); +} + + +static void offset_end( struct draw_stage *stage ) +{ + stage->next->end( stage->next ); +} + + +/** + * Create polygon offset drawing stage. + */ +struct draw_stage *draw_offset_stage( struct draw_context *draw ) +{ + struct offset_stage *offset = CALLOC_STRUCT(offset_stage); + + draw_alloc_tmps( &offset->stage, 3 ); + + offset->stage.draw = draw; + offset->stage.next = NULL; + offset->stage.begin = offset_begin; + offset->stage.point = offset_point; + offset->stage.line = offset_line; + offset->stage.tri = offset_tri; + offset->stage.end = offset_end; + + return &offset->stage; +} diff --git a/src/mesa/pipe/draw/draw_private.h b/src/mesa/pipe/draw/draw_private.h new file mode 100644 index 0000000000..573b5bf588 --- /dev/null +++ b/src/mesa/pipe/draw/draw_private.h @@ -0,0 +1,182 @@ +/************************************************************************** + * + * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas. + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sub license, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice (including the + * next paragraph) shall be included in all copies or substantial portions + * of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. + * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR + * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, + * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE + * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + **************************************************************************/ + +/** + * Private data structures, etc for the draw module. + */ + + +/** + * Authors: + * Keith Whitwell <keith@tungstengraphics.com> + * Brian Paul + */ + + +#ifndef DRAW_PRIVATE_H +#define DRAW_PRIVATE_H + + +#include "main/glheader.h" +#include "pipe/p_state.h" +#include "pipe/p_defines.h" +#include "vf/vf.h" + + +/** + * Basic vertex info. + * Carry some useful information around with the vertices in the prim pipe. + */ +struct vertex_header { + GLuint clipmask:12; + GLuint edgeflag:1; + GLuint pad:19; + + GLfloat clip[4]; + + GLfloat data[][4]; /* Note variable size */ +}; + + +/** + * Basic info for a point/line/triangle primitive. + */ +struct prim_header { + GLfloat det; /**< front/back face determinant */ + struct vertex_header *v[3]; /**< 1 to 3 vertex pointers */ +}; + + + +struct draw_context; + +/** + * Base class for all primitive drawing stages. + */ +struct draw_stage +{ + struct draw_context *draw; /**< parent context */ + + struct draw_stage *next; /**< next stage in pipeline */ + + struct vertex_header **tmp; + GLuint nr_tmps; + + void (*begin)( struct draw_stage * ); + + void (*point)( struct draw_stage *, + struct prim_header * ); + + void (*line)( struct draw_stage *, + struct prim_header * ); + + void (*tri)( struct draw_stage *, + struct prim_header * ); + + void (*end)( struct draw_stage * ); +}; + + +/** + * Private context for the drawing module. + */ +struct draw_context +{ + struct { + struct draw_stage *first; /**< one of the following */ + + /* stages (in logical order) */ + struct draw_stage *flatshade; + struct draw_stage *clip; + struct draw_stage *cull; + struct draw_stage *twoside; + struct draw_stage *offset; + struct draw_stage *unfilled; + struct draw_stage *setup; /* aka render/rasterize */ + } pipeline; + + /* pipe state that we need: */ + struct pipe_setup_state setup; + struct pipe_viewport_state viewport; + + /* Clip derived state: + */ + GLfloat plane[12][4]; + GLuint nr_planes; + + GLuint vf_attr_to_slot[PIPE_ATTRIB_MAX]; + + struct vf_attr_map attrs[VF_ATTRIB_MAX]; + GLuint nr_attrs; + GLuint vertex_size; /**< in bytes */ + struct vertex_fetch *vf; + + GLubyte *verts; + GLuint nr_vertices; + GLboolean in_vb; + + GLenum prim; /**< GL_POINTS, GL_LINE_STRIP, GL_QUADS, etc */ + + /* Helper for tnl: + */ + GLvector4f header; +}; + + + +extern struct draw_stage *draw_unfilled_stage( struct draw_context *context ); +extern struct draw_stage *draw_twoside_stage( struct draw_context *context ); +extern struct draw_stage *draw_offset_stage( struct draw_context *context ); +extern struct draw_stage *draw_clip_stage( struct draw_context *context ); +extern struct draw_stage *draw_flatshade_stage( struct draw_context *context ); +extern struct draw_stage *draw_cull_stage( struct draw_context *context ); + + +extern void draw_free_tmps( struct draw_stage *stage ); +extern void draw_alloc_tmps( struct draw_stage *stage, GLuint nr ); + + + +/** + * Get a writeable copy of a vertex. + * \param stage drawing stage info + * \param vert the vertex to copy (source) + * \param idx index into stage's tmp[] array to put the copy (dest) + * \return pointer to the copied vertex + */ +static INLINE struct vertex_header * +dup_vert( struct draw_stage *stage, + const struct vertex_header *vert, + GLuint idx ) +{ + struct vertex_header *tmp = stage->tmp[idx]; + memcpy(tmp, vert, stage->draw->vertex_size ); + return tmp; +} + + +#endif /* DRAW_PRIVATE_H */ diff --git a/src/mesa/pipe/draw/draw_twoside.c b/src/mesa/pipe/draw/draw_twoside.c new file mode 100644 index 0000000000..e86123e84d --- /dev/null +++ b/src/mesa/pipe/draw/draw_twoside.c @@ -0,0 +1,158 @@ +/************************************************************************** + * + * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas. + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sub license, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice (including the + * next paragraph) shall be included in all copies or substantial portions + * of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. + * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR + * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, + * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE + * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + **************************************************************************/ + +/* Authors: Keith Whitwell <keith@tungstengraphics.com> + */ + +#include "main/imports.h" +#include "pipe/p_defines.h" +#include "draw_private.h" + + +struct twoside_stage { + struct draw_stage stage; + + GLfloat facing; + const GLuint *lookup; +}; + + +static INLINE struct twoside_stage *twoside_stage( struct draw_stage *stage ) +{ + return (struct twoside_stage *)stage; +} + + +static void twoside_begin( struct draw_stage *stage ) +{ + struct twoside_stage *twoside = twoside_stage(stage); + + twoside->facing = (stage->draw->setup.front_winding == PIPE_WINDING_CW) ? 1 : -1; + + stage->next->begin( stage->next ); +} + + +static INLINE void copy_color( GLuint attr_dst, + GLuint attr_src, + struct vertex_header *v ) +{ + if (attr_dst && attr_src) { + memcpy( v->data[attr_dst], + v->data[attr_src], + sizeof(v->data[0]) ); + } +} + + +static struct vertex_header *copy_bfc( struct twoside_stage *twoside, + const struct vertex_header *v, + GLuint idx ) +{ + struct vertex_header *tmp = dup_vert( &twoside->stage, v, idx ); + + copy_color( twoside->lookup[VF_ATTRIB_COLOR0], + twoside->lookup[VF_ATTRIB_BFC0], + tmp ); + + copy_color( twoside->lookup[VF_ATTRIB_COLOR1], + twoside->lookup[VF_ATTRIB_BFC1], + tmp ); + + return tmp; +} + + +/* Twoside tri: + */ +static void twoside_tri( struct draw_stage *stage, + struct prim_header *header ) +{ + struct twoside_stage *twoside = twoside_stage(stage); + + if (header->det * twoside->facing < 0) { + /* this is a back-facing triangle */ + struct prim_header tmp; + + tmp.det = header->det; + /* copy back colors to front color slots */ + tmp.v[0] = copy_bfc(twoside, header->v[0], 0); + tmp.v[1] = copy_bfc(twoside, header->v[1], 1); + tmp.v[2] = copy_bfc(twoside, header->v[2], 2); + + stage->next->tri( stage->next, &tmp ); + } + else { + stage->next->tri( stage->next, header ); + } +} + + +static void twoside_line( struct draw_stage *stage, + struct prim_header *header ) +{ + /* pass-through */ + stage->next->line( stage->next, header ); +} + + +static void twoside_point( struct draw_stage *stage, + struct prim_header *header ) +{ + /* pass-through */ + stage->next->point( stage->next, header ); +} + + +static void twoside_end( struct draw_stage *stage ) +{ + /* pass-through */ + stage->next->end( stage->next ); +} + + +/** + * Create twoside pipeline stage. + */ +struct draw_stage *draw_twoside_stage( struct draw_context *draw ) +{ + struct twoside_stage *twoside = CALLOC_STRUCT(twoside_stage); + + draw_alloc_tmps( &twoside->stage, 3 ); + + twoside->stage.draw = draw; + twoside->stage.next = NULL; + twoside->stage.begin = twoside_begin; + twoside->stage.point = twoside_point; + twoside->stage.line = twoside_line; + twoside->stage.tri = twoside_tri; + twoside->stage.end = twoside_end; + + twoside->lookup = draw->vf_attr_to_slot; + + return &twoside->stage; +} diff --git a/src/mesa/pipe/draw/draw_unfilled.c b/src/mesa/pipe/draw/draw_unfilled.c new file mode 100644 index 0000000000..f0aee58333 --- /dev/null +++ b/src/mesa/pipe/draw/draw_unfilled.c @@ -0,0 +1,178 @@ +/************************************************************************** + * + * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas. + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sub license, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice (including the + * next paragraph) shall be included in all copies or substantial portions + * of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. + * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR + * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, + * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE + * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + **************************************************************************/ + +/** + * \brief Drawing stage for handling glPolygonMode(line/point). + * Convert triangles to points or lines as needed. + */ + +/* Authors: Keith Whitwell <keith@tungstengraphics.com> + */ + +#include "main/imports.h" +#include "pipe/p_defines.h" +#include "draw_private.h" + + +struct unfilled_stage { + struct draw_stage stage; + + /** [0] = front face, [1] = back face. + * legal values: PIPE_POLYGON_MODE_FILL, PIPE_POLYGON_MODE_LINE, + * and PIPE_POLYGON_MODE_POINT, + */ + GLuint mode[2]; +}; + + +static INLINE struct unfilled_stage *unfilled_stage( struct draw_stage *stage ) +{ + return (struct unfilled_stage *)stage; +} + + +static void unfilled_begin( struct draw_stage *stage ) +{ + struct unfilled_stage *unfilled = unfilled_stage(stage); + + unfilled->mode[0] = stage->draw->setup.fill_ccw; /* front */ + unfilled->mode[1] = stage->draw->setup.fill_cw; /* back */ + + stage->next->begin( stage->next ); +} + +static void point( struct draw_stage *stage, + struct vertex_header *v0 ) +{ + struct prim_header tmp; + tmp.v[0] = v0; + stage->next->point( stage->next, &tmp ); +} + +static void line( struct draw_stage *stage, + struct vertex_header *v0, + struct vertex_header *v1 ) +{ + struct prim_header tmp; + tmp.v[0] = v0; + tmp.v[1] = v1; + stage->next->line( stage->next, &tmp ); +} + + +static void points( struct draw_stage *stage, + struct prim_header *header ) +{ + struct vertex_header *v0 = header->v[0]; + struct vertex_header *v1 = header->v[1]; + struct vertex_header *v2 = header->v[2]; + + if (v0->edgeflag) point( stage, v0 ); + if (v1->edgeflag) point( stage, v1 ); + if (v2->edgeflag) point( stage, v2 ); +} + + +static void lines( struct draw_stage *stage, + struct prim_header *header ) +{ + struct vertex_header *v0 = header->v[0]; + struct vertex_header *v1 = header->v[1]; + struct vertex_header *v2 = header->v[2]; + + if (v0->edgeflag) line( stage, v0, v1 ); + if (v1->edgeflag) line( stage, v1, v2 ); + if (v2->edgeflag) line( stage, v2, v0 ); +} + + +/* Unfilled tri: + * + * Note edgeflags in the vertex struct is not sufficient as we will + * need to manipulate them when decomposing primitives??? + */ +static void unfilled_tri( struct draw_stage *stage, + struct prim_header *header ) +{ + struct unfilled_stage *unfilled = unfilled_stage(stage); + GLuint mode = unfilled->mode[header->det > 0.0]; + + switch (mode) { + case PIPE_POLYGON_MODE_FILL: + stage->next->tri( stage->next, header ); + break; + case PIPE_POLYGON_MODE_LINE: + lines( stage, header ); + break; + case PIPE_POLYGON_MODE_POINT: + points( stage, header ); + break; + default: + abort(); + } +} + +static void unfilled_line( struct draw_stage *stage, + struct prim_header *header ) +{ + stage->next->line( stage->next, header ); +} + + +static void unfilled_point( struct draw_stage *stage, + struct prim_header *header ) +{ + stage->next->point( stage->next, header ); +} + + +static void unfilled_end( struct draw_stage *stage ) +{ + stage->next->end( stage->next ); +} + + +/** + * Create unfilled triangle stage. + */ +struct draw_stage *draw_unfilled_stage( struct draw_context *draw ) +{ + struct unfilled_stage *unfilled = CALLOC_STRUCT(unfilled_stage); + + draw_alloc_tmps( &unfilled->stage, 0 ); + + unfilled->stage.draw = draw; + unfilled->stage.next = NULL; + unfilled->stage.tmp = NULL; + unfilled->stage.begin = unfilled_begin; + unfilled->stage.point = unfilled_point; + unfilled->stage.line = unfilled_line; + unfilled->stage.tri = unfilled_tri; + unfilled->stage.end = unfilled_end; + + return &unfilled->stage; +} diff --git a/src/mesa/pipe/draw/draw_vb.c b/src/mesa/pipe/draw/draw_vb.c new file mode 100644 index 0000000000..ac721c589d --- /dev/null +++ b/src/mesa/pipe/draw/draw_vb.c @@ -0,0 +1,722 @@ +/************************************************************************** + * + * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas. + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sub license, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice (including the + * next paragraph) shall be included in all copies or substantial portions + * of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. + * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR + * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, + * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE + * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + **************************************************************************/ + + /* + * Authors: + * Keith Whitwell <keith@tungstengraphics.com> + */ + +#include "imports.h" +#include "macros.h" + +#include "tnl/t_context.h" +#include "vf/vf.h" + +#include "draw_private.h" +#include "draw_context.h" + + +/* This file is a temporary set of hooks to allow us to use the tnl/ + * and vf/ modules until we have replacements in pipe. + */ + + +static struct vertex_header *get_vertex( struct draw_context *pipe, + GLuint i ) +{ + return (struct vertex_header *)(pipe->verts + i * pipe->vertex_size); +} + + + +static void draw_allocate_vertices( struct draw_context *draw, + GLuint nr_vertices ) +{ + draw->nr_vertices = nr_vertices; + draw->verts = MALLOC( nr_vertices * draw->vertex_size ); + + draw->pipeline.first->begin( draw->pipeline.first ); +} + +static void draw_set_prim( struct draw_context *draw, + GLenum prim ) +{ + draw->prim = prim; + + /* Not done yet - need to force edgeflags to 1 in strip/fan + * primitives. + */ +#if 0 + switch (prim) { + case GL_TRIANGLES: + case GL_POLYGON: + case GL_QUADS: + case GL_QUAD_STRIP: /* yes, we need this */ + respect_edgeflags( pipe, GL_TRUE ); + break; + + default: + respect_edgeflags( pipe, GL_FALSE ); + break; + } +#endif +} + + + +static void do_quad( struct draw_stage *first, + struct vertex_header *v0, + struct vertex_header *v1, + struct vertex_header *v2, + struct vertex_header *v3 ) +{ + struct prim_header prim; + + { + GLuint tmp = v1->edgeflag; + v1->edgeflag = 0; + + prim.v[0] = v0; + prim.v[1] = v1; + prim.v[2] = v3; + first->tri( first, &prim ); + + v1->edgeflag = tmp; + } + + { + GLuint tmp = v3->edgeflag; + v3->edgeflag = 0; + + prim.v[0] = v1; + prim.v[1] = v2; + prim.v[2] = v3; + first->tri( first, &prim ); + + v3->edgeflag = tmp; + } +} + + + + +static void draw_indexed_prim( struct draw_context *draw, + const GLuint *elts, + GLuint count ) +{ + struct draw_stage * const first = draw->pipeline.first; + struct prim_header prim; + GLuint i; + + prim.det = 0; /* valid from cull stage onwards */ + prim.v[0] = 0; + prim.v[1] = 0; + prim.v[2] = 0; + + switch (draw->prim) { + case GL_POINTS: + for (i = 0; i < count; i ++) { + prim.v[0] = get_vertex( draw, elts[i] ); + + first->point( first, &prim ); + } + break; + + case GL_LINES: + for (i = 0; i+1 < count; i += 2) { + prim.v[0] = get_vertex( draw, elts[i + 0] ); + prim.v[1] = get_vertex( draw, elts[i + 1] ); + + first->line( first, &prim ); + } + break; + + case GL_LINE_LOOP: + if (count >= 2) { + for (i = 1; i < count; i++) { + prim.v[0] = get_vertex( draw, elts[i-1] ); + prim.v[1] = get_vertex( draw, elts[i] ); + first->line( first, &prim ); + } + + prim.v[0] = get_vertex( draw, elts[count-1] ); + prim.v[1] = get_vertex( draw, elts[0] ); + first->line( first, &prim ); + } + break; + + case GL_LINE_STRIP: + /* I'm guessing it will be necessary to have something like a + * render->reset_line_stipple() method to properly support + * splitting strips into primitives like this. Alternately we + * could just scan ahead to find individual clipped lines and + * otherwise leave the strip intact - that might be better, but + * require more complex code here. + */ + if (count >= 2) { + prim.v[0] = 0; + prim.v[1] = get_vertex( draw, elts[0] ); + + for (i = 1; i < count; i++) { + prim.v[0] = prim.v[1]; + prim.v[1] = get_vertex( draw, elts[i] ); + + first->line( first, &prim ); + } + } + break; + + case GL_TRIANGLES: + for (i = 0; i+2 < count; i += 3) { + prim.v[0] = get_vertex( draw, elts[i + 0] ); + prim.v[1] = get_vertex( draw, elts[i + 1] ); + prim.v[2] = get_vertex( draw, elts[i + 2] ); + + first->tri( first, &prim ); + } + break; + + case GL_TRIANGLE_STRIP: + for (i = 0; i+2 < count; i++) { + if (i & 1) { + prim.v[0] = get_vertex( draw, elts[i + 1] ); + prim.v[1] = get_vertex( draw, elts[i + 0] ); + prim.v[2] = get_vertex( draw, elts[i + 2] ); + } + else { + prim.v[0] = get_vertex( draw, elts[i + 0] ); + prim.v[1] = get_vertex( draw, elts[i + 1] ); + prim.v[2] = get_vertex( draw, elts[i + 2] ); + } + + first->tri( first, &prim ); + } + break; + + case GL_TRIANGLE_FAN: + if (count >= 3) { + prim.v[0] = get_vertex( draw, elts[0] ); + prim.v[1] = 0; + prim.v[2] = get_vertex( draw, elts[1] ); + + for (i = 0; i+2 < count; i++) { + prim.v[1] = prim.v[2]; + prim.v[2] = get_vertex( draw, elts[i+2] ); + + first->tri( first, &prim ); + } + } + break; + + case GL_QUADS: + for (i = 0; i+3 < count; i += 4) { + do_quad( first, + get_vertex( draw, elts[i + 0] ), + get_vertex( draw, elts[i + 1] ), + get_vertex( draw, elts[i + 2] ), + get_vertex( draw, elts[i + 3] )); + } + break; + + case GL_QUAD_STRIP: + for (i = 0; i+3 < count; i += 2) { + do_quad( first, + get_vertex( draw, elts[i + 2] ), + get_vertex( draw, elts[i + 0] ), + get_vertex( draw, elts[i + 1] ), + get_vertex( draw, elts[i + 3] )); + } + break; + + + case GL_POLYGON: + if (count >= 3) { + int e1save, e2save; + prim.v[0] = 0; + prim.v[1] = get_vertex( draw, elts[1] ); + prim.v[2] = get_vertex( draw, elts[0] ); + e2save = prim.v[2]->edgeflag; + + for (i = 0; i+2 < count; i++) { + prim.v[0] = prim.v[1]; + prim.v[1] = get_vertex( draw, elts[i+2] ); + + /* save v1 edge flag, and clear if not last triangle */ + e1save = prim.v[1]->edgeflag; + if (i + 3 < count) + prim.v[1]->edgeflag = 0; + + /* draw */ + first->tri( first, &prim ); + + prim.v[1]->edgeflag = e1save; /* restore */ + prim.v[2]->edgeflag = 0; /* disable edge after 1st tri */ + } + prim.v[2]->edgeflag = e2save; + } + break; + + default: + assert(0); + break; + } +} + +static void draw_prim( struct draw_context *draw, + GLuint start, + GLuint count ) +{ + struct draw_stage * const first = draw->pipeline.first; + struct prim_header prim; + GLuint i; + +// _mesa_printf("%s (%d) %d/%d\n", __FUNCTION__, draw->prim, start, count ); + + prim.det = 0; /* valid from cull stage onwards */ + prim.v[0] = 0; + prim.v[1] = 0; + prim.v[2] = 0; + + switch (draw->prim) { + case GL_POINTS: + for (i = 0; i < count; i ++) { + prim.v[0] = get_vertex( draw, start + i ); + first->point( first, &prim ); + } + break; + + case GL_LINES: + for (i = 0; i+1 < count; i += 2) { + prim.v[0] = get_vertex( draw, start + i + 0 ); + prim.v[1] = get_vertex( draw, start + i + 1 ); + + first->line( first, &prim ); + } + break; + + case GL_LINE_LOOP: + if (count >= 2) { + for (i = 1; i < count; i++) { + prim.v[0] = get_vertex( draw, start + i - 1 ); + prim.v[1] = get_vertex( draw, start + i ); + first->line( first, &prim ); + } + + prim.v[0] = get_vertex( draw, start + count - 1 ); + prim.v[1] = get_vertex( draw, start + 0 ); + first->line( first, &prim ); + } + break; + + case GL_LINE_STRIP: + if (count >= 2) { + prim.v[0] = 0; + prim.v[1] = get_vertex( draw, start + 0 ); + + for (i = 1; i < count; i++) { + prim.v[0] = prim.v[1]; + prim.v[1] = get_vertex( draw, start + i ); + + first->line( first, &prim ); + } + } + break; + + case GL_TRIANGLES: + for (i = 0; i+2 < count; i += 3) { + prim.v[0] = get_vertex( draw, start + i + 0 ); + prim.v[1] = get_vertex( draw, start + i + 1 ); + prim.v[2] = get_vertex( draw, start + i + 2 ); + + first->tri( first, &prim ); + } + break; + + case GL_TRIANGLE_STRIP: + for (i = 0; i+2 < count; i++) { + if (i & 1) { + prim.v[0] = get_vertex( draw, start + i + 1 ); + prim.v[1] = get_vertex( draw, start + i + 0 ); + prim.v[2] = get_vertex( draw, start + i + 2 ); + } + else { + prim.v[0] = get_vertex( draw, start + i + 0 ); + prim.v[1] = get_vertex( draw, start + i + 1 ); + prim.v[2] = get_vertex( draw, start + i + 2 ); + } + + first->tri( first, &prim ); + } + break; + + case GL_TRIANGLE_FAN: + if (count >= 3) { + prim.v[0] = get_vertex( draw, start + 0 ); + prim.v[1] = 0; + prim.v[2] = get_vertex( draw, start + 1 ); + + for (i = 0; i+2 < count; i++) { + prim.v[1] = prim.v[2]; + prim.v[2] = get_vertex( draw, start + i + 2 ); + + first->tri( first, &prim ); + } + } + break; + + + case GL_QUADS: + for (i = 0; i+3 < count; i += 4) { + do_quad( first, + get_vertex( draw, start + i + 0 ), + get_vertex( draw, start + i + 1 ), + get_vertex( draw, start + i + 2 ), + get_vertex( draw, start + i + 3 )); + } + break; + + case GL_QUAD_STRIP: + for (i = 0; i+3 < count; i += 2) { + do_quad( first, + get_vertex( draw, start + i + 2 ), + get_vertex( draw, start + i + 0 ), + get_vertex( draw, start + i + 1 ), + get_vertex( draw, start + i + 3 )); + } + break; + + case GL_POLYGON: + if (count >= 3) { + int e1save, e2save; + prim.v[0] = 0; + prim.v[1] = get_vertex( draw, start + 1 ); + prim.v[2] = get_vertex( draw, start + 0 ); + e2save = prim.v[2]->edgeflag; + + for (i = 0; i+2 < count; i++) { + prim.v[0] = prim.v[1]; + prim.v[1] = get_vertex( draw, start + i + 2 ); + + /* save v1 edge flag, and clear if not last triangle */ + e1save = prim.v[1]->edgeflag; + if (i + 3 < count) + prim.v[1]->edgeflag = 0; + + /* draw */ + first->tri( first, &prim ); + + prim.v[1]->edgeflag = e1save; /* restore */ + prim.v[2]->edgeflag = 0; /* disable edge after 1st tri */ + } + prim.v[2]->edgeflag = e2save; + } + break; + + default: + assert(0); + break; + } +} + + +static void draw_release_vertices( struct draw_context *draw ) +{ + draw->pipeline.first->end( draw->pipeline.first ); + + FREE(draw->verts); + draw->verts = NULL; +} + + +struct header_dword { + GLuint clipmask:12; + GLuint edgeflag:1; + GLuint pad:19; +}; + + +static void +build_vertex_headers( struct draw_context *draw, + struct vertex_buffer *VB ) +{ + if (draw->header.storage == NULL) { + draw->header.stride = sizeof(GLfloat); + draw->header.size = 1; + draw->header.storage = ALIGN_MALLOC( VB->Size * sizeof(GLfloat), 32 ); + draw->header.data = draw->header.storage; + draw->header.count = 0; + draw->header.flags = VEC_SIZE_1 | VEC_MALLOC; + } + + /* Build vertex header attribute. + * + */ + + { + GLuint i; + struct header_dword *header = (struct header_dword *)draw->header.storage; + + /* yes its a hack + */ + assert(sizeof(*header) == sizeof(GLfloat)); + + draw->header.count = VB->Count; + + if (VB->EdgeFlag) { + for (i = 0; i < VB->Count; i++) { + header[i].clipmask = VB->ClipMask[i]; + header[i].edgeflag = VB->EdgeFlag[i]; + header[i].pad = 0; + } + } + else if (VB->ClipOrMask) { + for (i = 0; i < VB->Count; i++) { + header[i].clipmask = VB->ClipMask[i]; + header[i].edgeflag = 0; + header[i].pad = 0; + } + } + else { + for (i = 0; i < VB->Count; i++) { + header[i].clipmask = 0; + header[i].edgeflag = 0; + header[i].pad = 0; + } + } + } + + VB->AttribPtr[VF_ATTRIB_VERTEX_HEADER] = &draw->header; +} + + + + + +static GLuint draw_prim_info(GLenum mode, GLuint *first, GLuint *incr) +{ + switch (mode) { + case GL_POINTS: + *first = 1; + *incr = 1; + return 0; + case GL_LINES: + *first = 2; + *incr = 2; + return 0; + case GL_LINE_STRIP: + *first = 2; + *incr = 1; + return 0; + case GL_LINE_LOOP: + *first = 2; + *incr = 1; + return 1; + case GL_TRIANGLES: + *first = 3; + *incr = 3; + return 0; + case GL_TRIANGLE_STRIP: + *first = 3; + *incr = 1; + return 0; + case GL_TRIANGLE_FAN: + case GL_POLYGON: + *first = 3; + *incr = 1; + return 1; + case GL_QUADS: + *first = 4; + *incr = 4; + return 0; + case GL_QUAD_STRIP: + *first = 4; + *incr = 2; + return 0; + default: + assert(0); + *first = 1; + *incr = 1; + return 0; + } +} + + +static GLuint trim( GLuint count, GLuint first, GLuint incr ) +{ + if (count < first) + return 0; + else + return count - (count - first) % incr; +} + + +/* This is a hack & will all go away. + */ +void draw_vb(struct draw_context *draw, + struct vertex_buffer *VB ) +{ + GLuint i; + + VB->AttribPtr[VF_ATTRIB_POS] = VB->NdcPtr; + VB->AttribPtr[VF_ATTRIB_BFC0] = VB->ColorPtr[1]; + VB->AttribPtr[VF_ATTRIB_BFC1] = VB->SecondaryColorPtr[1]; + VB->AttribPtr[VF_ATTRIB_CLIP_POS] = VB->ClipPtr; + + /* Build vertex headers: + */ + build_vertex_headers( draw, VB ); + + draw->in_vb = 1; + + /* Allocate the vertices: + */ + draw_allocate_vertices( draw, VB->Count ); + + /* Bind the vb outputs: + */ + vf_set_sources( draw->vf, VB->AttribPtr, 0 ); + + /* Build the hardware or prim-pipe vertices: + */ + vf_emit_vertices( draw->vf, VB->Count, draw->verts ); + + + for (i = 0; i < VB->PrimitiveCount; i++) { + + GLenum mode = VB->Primitive[i].mode; + GLuint start = VB->Primitive[i].start; + GLuint length, first, incr; + + /* Trim the primitive down to a legal size. + */ + draw_prim_info( mode, &first, &incr ); + length = trim( VB->Primitive[i].count, first, incr ); + + if (!length) + continue; + + if (draw->prim != mode) + draw_set_prim( draw, mode ); + + if (VB->Elts) { + draw_indexed_prim( draw, + VB->Elts + start, + length ); + } + else { + draw_prim( draw, + start, + length ); + } + } + + draw_release_vertices( draw ); + draw->verts = NULL; + draw->in_vb = 0; +} + + +/** + * Accumulate another attribute's info. + * Note the "- 2" factor here. We need this because the vertex->data[] + * array does not include the first two attributes we emit (VERTEX_HEADER + * and CLIP_POS). So, the 3rd attribute actually winds up in the 1st + * position of the data[] array. + */ +#define EMIT_ATTR( VF_ATTR, STYLE ) \ +do { \ + if (draw->nr_attrs >= 2) \ + draw->vf_attr_to_slot[VF_ATTR] = draw->nr_attrs - 2; \ + draw->attrs[draw->nr_attrs].attrib = VF_ATTR; \ + draw->attrs[draw->nr_attrs].format = STYLE; \ + draw->nr_attrs++; \ +} while (0) + + +/** + * Tell the draw module about the layout of attributes in the vertex. + * We need this in order to know which vertex slot has color0, etc. + * + * \param slot_to_vf_attr an array which maps slot indexes to vertex + * format tokens (VF_*). + * \param nr_attrs the size of the slot_to_vf_attr array + * (and number of attributes) + */ +void draw_set_vertex_attributes( struct draw_context *draw, + const GLuint *slot_to_vf_attr, + GLuint nr_attrs ) +{ + GLuint i; + + memset(draw->vf_attr_to_slot, 0, sizeof(draw->vf_attr_to_slot)); + draw->nr_attrs = 0; + + /* + * First three attribs are always the same: header, clip pos, winpos + */ + EMIT_ATTR(VF_ATTRIB_VERTEX_HEADER, EMIT_1F); + EMIT_ATTR(VF_ATTRIB_CLIP_POS, EMIT_4F); + + assert(slot_to_vf_attr[0] == VF_ATTRIB_POS); + EMIT_ATTR(slot_to_vf_attr[0], EMIT_4F_VIEWPORT); + + /* + * Remaining attribs (color, texcoords, etc) + */ + for (i = 1; i < nr_attrs; i++) + EMIT_ATTR(slot_to_vf_attr[i], EMIT_4F); + + /* tell the vertex format module how to construct vertices for us */ + draw->vertex_size = vf_set_vertex_attributes( draw->vf, draw->attrs, + draw->nr_attrs, 0 ); +} + + +#define MAX_VERTEX_SIZE ((2 + FRAG_ATTRIB_MAX) * 4 * sizeof(GLfloat)) + +void draw_alloc_tmps( struct draw_stage *stage, GLuint nr ) +{ + stage->nr_tmps = nr; + + if (nr) { + GLubyte *store = MALLOC(MAX_VERTEX_SIZE * nr); + GLuint i; + + stage->tmp = MALLOC(sizeof(struct vertex_header *) * nr); + + for (i = 0; i < nr; i++) + stage->tmp[i] = (struct vertex_header *)(store + i * MAX_VERTEX_SIZE); + } +} + +void draw_free_tmps( struct draw_stage *stage ) +{ + if (stage->tmp) { + FREE(stage->tmp[0]); + FREE(stage->tmp); + } +} |