diff options
Diffstat (limited to 'src/mesa/pipe/i915simple/i915_state_derived.c')
| -rw-r--r-- | src/mesa/pipe/i915simple/i915_state_derived.c | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/src/mesa/pipe/i915simple/i915_state_derived.c b/src/mesa/pipe/i915simple/i915_state_derived.c new file mode 100644 index 0000000000..392ac09b40 --- /dev/null +++ b/src/mesa/pipe/i915simple/i915_state_derived.c @@ -0,0 +1,186 @@ +/************************************************************************** + * + * Copyright 2003 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. + * + **************************************************************************/ + +#include "main/glheader.h" +#include "main/macros.h" +#include "main/enums.h" + +#include "vf/vf.h" +#include "pipe/draw/draw_context.h" +#include "i915_context.h" +#include "i915_state.h" + + +#define EMIT_ATTR( VF_ATTR, FRAG_ATTR, INTERP ) \ +do { \ + slot_to_vf_attr[nr_attrs] = VF_ATTR; \ + nr_attrs++; \ + attr_mask |= (1 << (VF_ATTR)); \ +} while (0) + + +static const GLuint frag_to_vf[FRAG_ATTRIB_MAX] = +{ + VF_ATTRIB_POS, + VF_ATTRIB_COLOR0, + VF_ATTRIB_COLOR1, + VF_ATTRIB_FOG, + VF_ATTRIB_TEX0, + VF_ATTRIB_TEX1, + VF_ATTRIB_TEX2, + VF_ATTRIB_TEX3, + VF_ATTRIB_TEX4, + VF_ATTRIB_TEX5, + VF_ATTRIB_TEX6, + VF_ATTRIB_TEX7, + VF_ATTRIB_VAR0, + VF_ATTRIB_VAR1, + VF_ATTRIB_VAR2, + VF_ATTRIB_VAR3, + VF_ATTRIB_VAR4, + VF_ATTRIB_VAR5, + VF_ATTRIB_VAR6, + VF_ATTRIB_VAR7, +}; + + +/** + * Determine which post-transform / pre-rasterization vertex attributes + * we need. + * Derived from: fs, setup states. + */ +static void calculate_vertex_layout( struct i915_context *i915 ) +{ +// const GLbitfield inputsRead = i915->fs.inputs_read; + const GLbitfield inputsRead = (FRAG_ATTRIB_WPOS | FRAG_ATTRIB_COL0); + GLuint slot_to_vf_attr[VF_ATTRIB_MAX]; + GLbitfield attr_mask = 0x0; + GLuint nr_attrs = 0; + GLuint i; + + memset(slot_to_vf_attr, 0, sizeof(slot_to_vf_attr)); + + + /* TODO - Figure out if we need to do perspective divide, etc. + */ + EMIT_ATTR(VF_ATTRIB_POS, FRAG_ATTRIB_WPOS, INTERP_LINEAR); + + /* Pull in the rest of the attributes. They are all in float4 + * format. Future optimizations could be to keep some attributes + * as fixed point or ubyte format. + */ + for (i = 1; i < FRAG_ATTRIB_TEX0; i++) { + if (inputsRead & (1 << i)) { + assert(i < sizeof(frag_to_vf) / sizeof(frag_to_vf[0])); + if (i915->setup.flatshade + && (i == FRAG_ATTRIB_COL0 || i == FRAG_ATTRIB_COL1)) + EMIT_ATTR(frag_to_vf[i], i, INTERP_CONSTANT); + else + EMIT_ATTR(frag_to_vf[i], i, INTERP_LINEAR); + } + } + + for (i = FRAG_ATTRIB_TEX0; i < FRAG_ATTRIB_MAX; i++) { + if (inputsRead & (1 << i)) { + assert(i < sizeof(frag_to_vf) / sizeof(frag_to_vf[0])); + EMIT_ATTR(frag_to_vf[i], i, INTERP_PERSPECTIVE); + } + } + + /* Additional attributes required for setup: Just twosided + * lighting. Edgeflag is dealt with specially by setting bits in + * the vertex header. + */ + if (i915->setup.light_twoside) { + if (inputsRead & FRAG_BIT_COL0) { + EMIT_ATTR(VF_ATTRIB_BFC0, FRAG_ATTRIB_MAX, 0); /* XXX: mark as discarded after setup */ + } + + if (inputsRead & FRAG_BIT_COL1) { + EMIT_ATTR(VF_ATTRIB_BFC1, FRAG_ATTRIB_MAX, 0); /* XXX: discard after setup */ + } + } + + /* If the attributes have changed, tell the draw module (which in turn + * tells the vf module) about the new vertex layout. + */ + draw_set_vertex_attributes( i915->draw, + slot_to_vf_attr, + nr_attrs ); +} + + +/** + * Recompute cliprect from scissor bounds, scissor enable and surface size. + */ +static void +compute_cliprect(struct i915_context *sp) +{ + GLint surfWidth, surfHeight; + + if (sp->framebuffer.num_cbufs > 0) { + surfWidth = sp->framebuffer.cbufs[0]->width; + surfHeight = sp->framebuffer.cbufs[0]->height; + } + else { + /* no surface? */ + surfWidth = sp->scissor.maxx; + surfHeight = sp->scissor.maxy; + } + + if (sp->setup.scissor) { + /* clip to scissor rect */ + sp->cliprect.minx = MAX2(sp->scissor.minx, 0); + sp->cliprect.miny = MAX2(sp->scissor.miny, 0); + sp->cliprect.maxx = MIN2(sp->scissor.maxx, surfWidth); + sp->cliprect.maxy = MIN2(sp->scissor.maxy, surfHeight); + } + else { + /* clip to surface bounds */ + sp->cliprect.minx = 0; + sp->cliprect.miny = 0; + sp->cliprect.maxx = surfWidth; + sp->cliprect.maxy = surfHeight; + } +} + + +/* Hopefully this will remain quite simple, otherwise need to pull in + * something like the state tracker mechanism. + */ +void i915_update_derived( struct i915_context *i915 ) +{ + if (i915->dirty & (I915_NEW_SETUP | I915_NEW_FS)) + calculate_vertex_layout( i915 ); + + if (i915->dirty & (I915_NEW_SCISSOR | + I915_NEW_STENCIL | + I915_NEW_FRAMEBUFFER)) + compute_cliprect(i915); + + i915->dirty = 0; +} |