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/**************************************************************************
*
* Copyright 2007 VMware, Inc.
* 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 VMWARE 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 <keithw@vmware.com>
*/
#include "main/macros.h"
#include "st_context.h"
#include "st_atom.h"
#include "pipe/p_context.h"
#include "pipe/p_defines.h"
#include "cso_cache/cso_context.h"
static GLuint translate_fill( GLenum mode )
{
switch (mode) {
case GL_POINT:
return PIPE_POLYGON_MODE_POINT;
case GL_LINE:
return PIPE_POLYGON_MODE_LINE;
case GL_FILL:
return PIPE_POLYGON_MODE_FILL;
default:
assert(0);
return 0;
}
}
static void update_raster_state( struct st_context *st )
{
struct gl_context *ctx = st->ctx;
struct pipe_rasterizer_state *raster = &st->state.rasterizer;
const struct gl_vertex_program *vertProg = ctx->VertexProgram._Current;
const struct gl_fragment_program *fragProg = ctx->FragmentProgram._Current;
uint i;
memset(raster, 0, sizeof(*raster));
/* _NEW_POLYGON, _NEW_BUFFERS
*/
{
raster->front_ccw = (ctx->Polygon.FrontFace == GL_CCW);
/*
* Gallium's surfaces are Y=0=TOP orientation. OpenGL is the
* opposite. Window system surfaces are Y=0=TOP. Mesa's FBOs
* must match OpenGL conventions so FBOs use Y=0=BOTTOM. In that
* case, we must invert Y and flip the notion of front vs. back.
*/
if (st_fb_orientation(ctx->DrawBuffer) == Y_0_BOTTOM) {
/* Drawing to an FBO. The viewport will be inverted. */
raster->front_ccw ^= 1;
}
}
/* _NEW_LIGHT
*/
raster->flatshade = ctx->Light.ShadeModel == GL_FLAT;
raster->flatshade_first = ctx->Light.ProvokingVertex ==
GL_FIRST_VERTEX_CONVENTION_EXT;
/* _NEW_LIGHT | _NEW_PROGRAM */
raster->light_twoside = ctx->VertexProgram._TwoSideEnabled;
/*_NEW_LIGHT | _NEW_BUFFERS */
raster->clamp_vertex_color = !st->clamp_vert_color_in_shader &&
ctx->Light._ClampVertexColor;
/* _NEW_POLYGON
*/
if (ctx->Polygon.CullFlag) {
switch (ctx->Polygon.CullFaceMode) {
case GL_FRONT:
raster->cull_face = PIPE_FACE_FRONT;
break;
case GL_BACK:
raster->cull_face = PIPE_FACE_BACK;
break;
case GL_FRONT_AND_BACK:
raster->cull_face = PIPE_FACE_FRONT_AND_BACK;
break;
}
}
else {
raster->cull_face = PIPE_FACE_NONE;
}
/* _NEW_POLYGON
*/
{
raster->fill_front = translate_fill( ctx->Polygon.FrontMode );
raster->fill_back = translate_fill( ctx->Polygon.BackMode );
/* Simplify when culling is active:
*/
if (raster->cull_face & PIPE_FACE_FRONT) {
raster->fill_front = raster->fill_back;
}
if (raster->cull_face & PIPE_FACE_BACK) {
raster->fill_back = raster->fill_front;
}
}
/* _NEW_POLYGON
*/
if (ctx->Polygon.OffsetPoint ||
ctx->Polygon.OffsetLine ||
ctx->Polygon.OffsetFill) {
raster->offset_point = ctx->Polygon.OffsetPoint;
raster->offset_line = ctx->Polygon.OffsetLine;
raster->offset_tri = ctx->Polygon.OffsetFill;
raster->offset_units = ctx->Polygon.OffsetUnits;
raster->offset_scale = ctx->Polygon.OffsetFactor;
}
raster->poly_smooth = ctx->Polygon.SmoothFlag;
raster->poly_stipple_enable = ctx->Polygon.StippleFlag;
/* _NEW_POINT
*/
raster->point_size = ctx->Point.Size;
raster->point_smooth = !ctx->Point.PointSprite && ctx->Point.SmoothFlag;
/* _NEW_POINT | _NEW_PROGRAM
*/
if (ctx->Point.PointSprite) {
/* origin */
if ((ctx->Point.SpriteOrigin == GL_UPPER_LEFT) ^
(st_fb_orientation(ctx->DrawBuffer) == Y_0_BOTTOM))
raster->sprite_coord_mode = PIPE_SPRITE_COORD_UPPER_LEFT;
else
raster->sprite_coord_mode = PIPE_SPRITE_COORD_LOWER_LEFT;
/* Coord replacement flags. If bit 'k' is set that means
* that we need to replace GENERIC[k] attrib with an automatically
* computed texture coord.
*/
for (i = 0; i < MAX_TEXTURE_COORD_UNITS; i++) {
if (ctx->Point.CoordReplace[i]) {
raster->sprite_coord_enable |= 1 << i;
}
}
if (fragProg->Base.InputsRead & VARYING_BIT_PNTC) {
raster->sprite_coord_enable |=
1 << (VARYING_SLOT_PNTC - VARYING_SLOT_TEX0);
}
raster->point_quad_rasterization = 1;
}
/* ST_NEW_VERTEX_PROGRAM
*/
if (vertProg) {
if (vertProg->Base.Id == 0) {
if (vertProg->Base.OutputsWritten & BITFIELD64_BIT(VARYING_SLOT_PSIZ)) {
/* generated program which emits point size */
raster->point_size_per_vertex = TRUE;
}
}
else if (ctx->VertexProgram.PointSizeEnabled) {
/* user-defined program and GL_VERTEX_PROGRAM_POINT_SIZE set */
raster->point_size_per_vertex = ctx->VertexProgram.PointSizeEnabled;
}
}
if (!raster->point_size_per_vertex) {
/* clamp size now */
raster->point_size = CLAMP(ctx->Point.Size,
ctx->Point.MinSize,
ctx->Point.MaxSize);
}
/* _NEW_LINE
*/
raster->line_smooth = ctx->Line.SmoothFlag;
if (ctx->Line.SmoothFlag) {
raster->line_width = CLAMP(ctx->Line.Width,
ctx->Const.MinLineWidthAA,
ctx->Const.MaxLineWidthAA);
}
else {
raster->line_width = CLAMP(ctx->Line.Width,
ctx->Const.MinLineWidth,
ctx->Const.MaxLineWidth);
}
raster->line_stipple_enable = ctx->Line.StippleFlag;
raster->line_stipple_pattern = ctx->Line.StipplePattern;
/* GL stipple factor is in [1,256], remap to [0, 255] here */
raster->line_stipple_factor = ctx->Line.StippleFactor - 1;
/* _NEW_MULTISAMPLE */
raster->multisample = ctx->Multisample._Enabled;
/* _NEW_SCISSOR */
raster->scissor = ctx->Scissor.EnableFlags;
/* _NEW_FRAG_CLAMP */
raster->clamp_fragment_color = !st->clamp_frag_color_in_shader &&
ctx->Color._ClampFragmentColor;
raster->half_pixel_center = 1;
if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP)
raster->bottom_edge_rule = 1;
/* ST_NEW_RASTERIZER */
raster->rasterizer_discard = ctx->RasterDiscard;
/* _NEW_TRANSFORM */
raster->depth_clip = ctx->Transform.DepthClamp == GL_FALSE;
raster->clip_plane_enable = ctx->Transform.ClipPlanesEnabled;
cso_set_rasterizer(st->cso_context, raster);
}
const struct st_tracked_state st_update_rasterizer = {
"st_update_rasterizer", /* name */
{
(_NEW_BUFFERS |
_NEW_LIGHT |
_NEW_LINE |
_NEW_MULTISAMPLE |
_NEW_POINT |
_NEW_POLYGON |
_NEW_PROGRAM |
_NEW_SCISSOR |
_NEW_FRAG_CLAMP |
_NEW_TRANSFORM), /* mesa state dependencies*/
(ST_NEW_VERTEX_PROGRAM |
ST_NEW_RASTERIZER), /* state tracker dependencies */
},
update_raster_state /* update function */
};
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