diff options
Diffstat (limited to 'src/gallium/auxiliary/draw/draw_context.c')
| -rw-r--r-- | src/gallium/auxiliary/draw/draw_context.c | 402 |
1 files changed, 402 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/draw/draw_context.c b/src/gallium/auxiliary/draw/draw_context.c new file mode 100644 index 0000000000..41a4cba1dd --- /dev/null +++ b/src/gallium/auxiliary/draw/draw_context.c @@ -0,0 +1,402 @@ +/************************************************************************** + * + * 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 "util/u_memory.h" +#include "util/u_math.h" +#include "draw_context.h" +#include "draw_vbuf.h" +#include "draw_vs.h" +#include "draw_pt.h" +#include "draw_pipe.h" + + +struct draw_context *draw_create( void ) +{ + struct draw_context *draw = CALLOC_STRUCT( draw_context ); + if (draw == NULL) + goto fail; + + 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->reduced_prim = ~0; /* != any of PIPE_PRIM_x */ + + + if (!draw_pipeline_init( draw )) + goto fail; + + if (!draw_pt_init( draw )) + goto fail; + + if (!draw_vs_init( draw )) + goto fail; + + return draw; + +fail: + draw_destroy( draw ); + return NULL; +} + + +void draw_destroy( struct draw_context *draw ) +{ + if (!draw) + return; + + + + /* Not so fast -- we're just borrowing this at the moment. + * + if (draw->render) + draw->render->destroy( draw->render ); + */ + + draw_pipeline_destroy( draw ); + draw_pt_destroy( draw ); + draw_vs_destroy( draw ); + + FREE( draw ); +} + + + +void draw_flush( struct draw_context *draw ) +{ + draw_do_flush( draw, DRAW_FLUSH_BACKEND ); +} + + + +/** + * Register new primitive rasterization/rendering state. + * This causes the drawing pipeline to be rebuilt. + */ +void draw_set_rasterizer_state( struct draw_context *draw, + const struct pipe_rasterizer_state *raster ) +{ + draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE ); + + draw->rasterizer = raster; + draw->bypass_clipping = + ((draw->rasterizer && draw->rasterizer->bypass_clipping) || + draw->driver.bypass_clipping); +} + + +void draw_set_driver_clipping( struct draw_context *draw, + boolean bypass_clipping ) +{ + draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE ); + + draw->driver.bypass_clipping = bypass_clipping; + draw->bypass_clipping = (draw->rasterizer->bypass_clipping || + draw->driver.bypass_clipping); +} + + +/** + * Plug in the primitive rendering/rasterization stage (which is the last + * stage in the drawing pipeline). + * This is provided by the device driver. + */ +void draw_set_rasterize_stage( struct draw_context *draw, + struct draw_stage *stage ) +{ + draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE ); + + draw->pipeline.rasterize = stage; +} + + +/** + * Set the draw module's clipping state. + */ +void draw_set_clip_state( struct draw_context *draw, + const struct pipe_clip_state *clip ) +{ + draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE ); + + assert(clip->nr <= PIPE_MAX_CLIP_PLANES); + 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_do_flush( draw, DRAW_FLUSH_STATE_CHANGE ); + draw->viewport = *viewport; /* struct copy */ + draw->identity_viewport = (viewport->scale[0] == 1.0f && + viewport->scale[1] == 1.0f && + viewport->scale[2] == 1.0f && + viewport->scale[3] == 1.0f && + viewport->translate[0] == 0.0f && + viewport->translate[1] == 0.0f && + viewport->translate[2] == 0.0f && + viewport->translate[3] == 0.0f); + + draw_vs_set_viewport( draw, viewport ); +} + + + +void +draw_set_vertex_buffers(struct draw_context *draw, + unsigned count, + const struct pipe_vertex_buffer *buffers) +{ + assert(count <= PIPE_MAX_ATTRIBS); + + memcpy(draw->pt.vertex_buffer, buffers, count * sizeof(buffers[0])); + draw->pt.nr_vertex_buffers = count; +} + + +void +draw_set_vertex_elements(struct draw_context *draw, + unsigned count, + const struct pipe_vertex_element *elements) +{ + assert(count <= PIPE_MAX_ATTRIBS); + + memcpy(draw->pt.vertex_element, elements, count * sizeof(elements[0])); + draw->pt.nr_vertex_elements = count; +} + + +/** + * Tell drawing context where to find mapped vertex buffers. + */ +void +draw_set_mapped_vertex_buffer(struct draw_context *draw, + unsigned attr, const void *buffer) +{ + draw->pt.user.vbuffer[attr] = buffer; +} + + +void +draw_set_mapped_constant_buffer(struct draw_context *draw, + const void *buffer, + unsigned size ) +{ + draw->pt.user.constants = buffer; + draw_vs_set_constants( draw, (const float (*)[4])buffer, size ); +} + + +/** + * Tells the draw module to draw points with triangles if their size + * is greater than this threshold. + */ +void +draw_wide_point_threshold(struct draw_context *draw, float threshold) +{ + draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE ); + draw->pipeline.wide_point_threshold = threshold; +} + + +/** + * Tells the draw module to draw lines with triangles if their width + * is greater than this threshold. + */ +void +draw_wide_line_threshold(struct draw_context *draw, float threshold) +{ + draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE ); + draw->pipeline.wide_line_threshold = threshold; +} + + +/** + * Tells the draw module whether or not to implement line stipple. + */ +void +draw_enable_line_stipple(struct draw_context *draw, boolean enable) +{ + draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE ); + draw->pipeline.line_stipple = enable; +} + + +/** + * Tells draw module whether to convert points to quads for sprite mode. + */ +void +draw_enable_point_sprites(struct draw_context *draw, boolean enable) +{ + draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE ); + draw->pipeline.point_sprite = enable; +} + + +void +draw_set_force_passthrough( struct draw_context *draw, boolean enable ) +{ + draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE ); + draw->force_passthrough = enable; +} + + +/** + * Ask the draw module for the location/slot of the given vertex attribute in + * a post-transformed vertex. + * + * With this function, drivers that use the draw module should have no reason + * to track the current vertex shader. + * + * Note that the draw module may sometimes generate vertices with extra + * attributes (such as texcoords for AA lines). The driver can call this + * function to find those attributes. + * + * Zero is returned if the attribute is not found since this is + * a don't care / undefined situtation. Returning -1 would be a bit more + * work for the drivers. + */ +int +draw_find_vs_output(const struct draw_context *draw, + uint semantic_name, uint semantic_index) +{ + const struct draw_vertex_shader *vs = draw->vs.vertex_shader; + uint i; + for (i = 0; i < vs->info.num_outputs; i++) { + if (vs->info.output_semantic_name[i] == semantic_name && + vs->info.output_semantic_index[i] == semantic_index) + return i; + } + + /* XXX there may be more than one extra vertex attrib. + * For example, simulated gl_FragCoord and gl_PointCoord. + */ + if (draw->extra_vp_outputs.semantic_name == semantic_name && + draw->extra_vp_outputs.semantic_index == semantic_index) { + return draw->extra_vp_outputs.slot; + } + return 0; +} + + +/** + * Return number of vertex shader outputs. + */ +uint +draw_num_vs_outputs(const struct draw_context *draw) +{ + uint count = draw->vs.vertex_shader->info.num_outputs; + if (draw->extra_vp_outputs.slot > 0) + count++; + return count; +} + + + +void draw_set_render( struct draw_context *draw, + struct vbuf_render *render ) +{ + draw->render = render; +} + +void draw_set_edgeflags( struct draw_context *draw, + const unsigned *edgeflag ) +{ + draw->pt.user.edgeflag = edgeflag; +} + + + + +/** + * Tell the drawing context about the index/element buffer to use + * (ala glDrawElements) + * If no element buffer is to be used (i.e. glDrawArrays) then this + * should be called with eltSize=0 and elements=NULL. + * + * \param draw the drawing context + * \param eltSize size of each element (1, 2 or 4 bytes) + * \param elements the element buffer ptr + */ +void +draw_set_mapped_element_buffer_range( struct draw_context *draw, + unsigned eltSize, + unsigned min_index, + unsigned max_index, + void *elements ) +{ + draw->pt.user.elts = elements; + draw->pt.user.eltSize = eltSize; + draw->pt.user.min_index = min_index; + draw->pt.user.max_index = max_index; +} + + +void +draw_set_mapped_element_buffer( struct draw_context *draw, + unsigned eltSize, + void *elements ) +{ + draw->pt.user.elts = elements; + draw->pt.user.eltSize = eltSize; + draw->pt.user.min_index = 0; + draw->pt.user.max_index = 0xffffffff; +} + + +/* Revamp me please: + */ +void draw_do_flush( struct draw_context *draw, unsigned flags ) +{ + if (!draw->suspend_flushing) + { + assert(!draw->flushing); /* catch inadvertant recursion */ + + draw->flushing = TRUE; + + draw_pipeline_flush( draw, flags ); + + draw->reduced_prim = ~0; /* is reduced_prim needed any more? */ + + draw->flushing = FALSE; + } +} |