/**
* Is alpha to coverage enabled and applicable to the currently bound
* framebuffer?
*/
bool
_mesa_is_alpha_to_coverage_enabled(const struct gl_context *ctx)
{
bool buffer0_is_integer = ctx->DrawBuffer->_IntegerBuffers & 0x1;
return (ctx->Multisample.SampleAlphaToCoverage &&
_mesa_is_multisample_enabled(ctx) &&
!buffer0_is_integer);
}
static void
upload_sf(struct brw_context *brw)
{
struct gl_context *ctx = &brw->ctx;
uint32_t dw1 = 0, dw2 = 0, dw3 = 0;
float point_size;
dw1 = GEN6_SF_STATISTICS_ENABLE;
if (brw->sf.viewport_transform_enable)
dw1 |= GEN6_SF_VIEWPORT_TRANSFORM_ENABLE;
/* _NEW_LINE */
uint32_t line_width_u3_7 = brw_get_line_width(brw);
if (brw->gen >= 9 || brw->is_cherryview) {
dw1 |= line_width_u3_7 << GEN9_SF_LINE_WIDTH_SHIFT;
} else {
dw2 |= line_width_u3_7 << GEN6_SF_LINE_WIDTH_SHIFT;
}
if (ctx->Line.SmoothFlag) {
dw2 |= GEN6_SF_LINE_END_CAP_WIDTH_1_0;
}
/* _NEW_POINT - Clamp to ARB_point_parameters user limits */
point_size = CLAMP(ctx->Point.Size, ctx->Point.MinSize, ctx->Point.MaxSize);
/* Clamp to the hardware limits and convert to fixed point */
dw3 |= U_FIXED(CLAMP(point_size, 0.125f, 255.875f), 3);
/* _NEW_PROGRAM | _NEW_POINT, BRW_NEW_VUE_MAP_GEOM_OUT */
if (use_state_point_size(brw))
dw3 |= GEN6_SF_USE_STATE_POINT_WIDTH;
/* _NEW_POINT | _NEW_MULTISAMPLE */
if ((ctx->Point.SmoothFlag || _mesa_is_multisample_enabled(ctx)) &&
!ctx->Point.PointSprite) {
dw3 |= GEN8_SF_SMOOTH_POINT_ENABLE;
}
dw3 |= GEN6_SF_LINE_AA_MODE_TRUE;
/* _NEW_LIGHT */
if (ctx->Light.ProvokingVertex != GL_FIRST_VERTEX_CONVENTION) {
dw3 |= (2 << GEN6_SF_TRI_PROVOKE_SHIFT) |
(2 << GEN6_SF_TRIFAN_PROVOKE_SHIFT) |
(1 << GEN6_SF_LINE_PROVOKE_SHIFT);
} else {
dw3 |= (1 << GEN6_SF_TRIFAN_PROVOKE_SHIFT);
}
BEGIN_BATCH(4);
OUT_BATCH(_3DSTATE_SF << 16 | (4 - 2));
OUT_BATCH(dw1);
OUT_BATCH(dw2);
OUT_BATCH(dw3);
ADVANCE_BATCH();
}
/**
* Update fragment program state/atom. This involves translating the
* Mesa fragment program into a gallium fragment program and binding it.
*/
static void
update_fp( struct st_context *st )
{
struct st_fragment_program *stfp;
struct st_fp_variant_key key;
assert(st->ctx->FragmentProgram._Current);
stfp = st_fragment_program(st->ctx->FragmentProgram._Current);
assert(stfp->Base.Base.Target == GL_FRAGMENT_PROGRAM_ARB);
memset(&key, 0, sizeof(key));
key.st = st->has_shareable_shaders ? NULL : st;
/* _NEW_FRAG_CLAMP */
key.clamp_color = st->clamp_frag_color_in_shader &&
st->ctx->Color._ClampFragmentColor;
/* _NEW_MULTISAMPLE | _NEW_BUFFERS */
key.persample_shading =
st->force_persample_in_shader &&
_mesa_is_multisample_enabled(st->ctx) &&
st->ctx->Multisample.SampleShading &&
st->ctx->Multisample.MinSampleShadingValue *
_mesa_geometric_samples(st->ctx->DrawBuffer) > 1;
if (stfp->ati_fs) {
unsigned u;
if (st->ctx->Fog.Enabled) {
key.fog = translate_fog_mode(st->ctx->Fog.Mode);
}
for (u = 0; u < MAX_NUM_FRAGMENT_REGISTERS_ATI; u++) {
key.texture_targets[u] = get_texture_target(st->ctx, u);
}
}
st->fp_variant = st_get_fp_variant(st, stfp, &key);
st_reference_fragprog(st, &st->fp, stfp);
cso_set_fragment_shader_handle(st->cso_context,
st->fp_variant->driver_shader);
}
static void
upload_raster(struct brw_context *brw)
{
struct gl_context *ctx = &brw->ctx;
uint32_t dw1 = 0;
/* _NEW_BUFFERS */
bool render_to_fbo = _mesa_is_user_fbo(brw->ctx.DrawBuffer);
/* _NEW_POLYGON */
if (ctx->Polygon._FrontBit == render_to_fbo)
dw1 |= GEN8_RASTER_FRONT_WINDING_CCW;
if (ctx->Polygon.CullFlag) {
switch (ctx->Polygon.CullFaceMode) {
case GL_FRONT:
dw1 |= GEN8_RASTER_CULL_FRONT;
break;
case GL_BACK:
dw1 |= GEN8_RASTER_CULL_BACK;
break;
case GL_FRONT_AND_BACK:
dw1 |= GEN8_RASTER_CULL_BOTH;
break;
default:
unreachable("not reached");
}
} else {
dw1 |= GEN8_RASTER_CULL_NONE;
}
/* _NEW_POINT */
if (ctx->Point.SmoothFlag)
dw1 |= GEN8_RASTER_SMOOTH_POINT_ENABLE;
if (_mesa_is_multisample_enabled(ctx))
dw1 |= GEN8_RASTER_API_MULTISAMPLE_ENABLE;
if (ctx->Polygon.OffsetFill)
dw1 |= GEN6_SF_GLOBAL_DEPTH_OFFSET_SOLID;
if (ctx->Polygon.OffsetLine)
dw1 |= GEN6_SF_GLOBAL_DEPTH_OFFSET_WIREFRAME;
if (ctx->Polygon.OffsetPoint)
dw1 |= GEN6_SF_GLOBAL_DEPTH_OFFSET_POINT;
switch (ctx->Polygon.FrontMode) {
case GL_FILL:
dw1 |= GEN6_SF_FRONT_SOLID;
break;
case GL_LINE:
dw1 |= GEN6_SF_FRONT_WIREFRAME;
break;
case GL_POINT:
dw1 |= GEN6_SF_FRONT_POINT;
break;
default:
unreachable("not reached");
}
switch (ctx->Polygon.BackMode) {
case GL_FILL:
dw1 |= GEN6_SF_BACK_SOLID;
break;
case GL_LINE:
dw1 |= GEN6_SF_BACK_WIREFRAME;
break;
case GL_POINT:
dw1 |= GEN6_SF_BACK_POINT;
break;
default:
unreachable("not reached");
}
/* _NEW_LINE */
if (ctx->Line.SmoothFlag)
dw1 |= GEN8_RASTER_LINE_AA_ENABLE;
/* _NEW_SCISSOR */
if (ctx->Scissor.EnableFlags)
dw1 |= GEN8_RASTER_SCISSOR_ENABLE;
/* _NEW_TRANSFORM */
if (!ctx->Transform.DepthClamp) {
if (brw->gen >= 9) {
dw1 |= GEN9_RASTER_VIEWPORT_Z_NEAR_CLIP_TEST_ENABLE |
GEN9_RASTER_VIEWPORT_Z_FAR_CLIP_TEST_ENABLE;
} else {
dw1 |= GEN8_RASTER_VIEWPORT_Z_CLIP_TEST_ENABLE;
}
}
BEGIN_BATCH(5);
OUT_BATCH(_3DSTATE_RASTER << 16 | (5 - 2));
OUT_BATCH(dw1);
OUT_BATCH_F(ctx->Polygon.OffsetUnits * 2); /* constant. copied from gen4 */
OUT_BATCH_F(ctx->Polygon.OffsetFactor); /* scale */
OUT_BATCH_F(ctx->Polygon.OffsetClamp); /* global depth offset clamp */
ADVANCE_BATCH();
}
static void
gen6_upload_blend_state(struct brw_context *brw)
{
bool is_buffer_zero_integer_format = false;
struct gl_context *ctx = &brw->ctx;
struct gen6_blend_state *blend;
int b;
int nr_draw_buffers = ctx->DrawBuffer->_NumColorDrawBuffers;
int size;
/* We need at least one BLEND_STATE written, because we might do
* thread dispatch even if _NumColorDrawBuffers is 0 (for example
* for computed depth or alpha test), which will do an FB write
* with render target 0, which will reference BLEND_STATE[0] for
* alpha test enable.
*/
if (nr_draw_buffers == 0)
nr_draw_buffers = 1;
size = sizeof(*blend) * nr_draw_buffers;
blend = brw_state_batch(brw, AUB_TRACE_BLEND_STATE,
size, 64, &brw->cc.blend_state_offset);
memset(blend, 0, size);
for (b = 0; b < nr_draw_buffers; b++) {
/* _NEW_BUFFERS */
struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[b];
GLenum rb_type;
bool integer;
if (rb)
rb_type = _mesa_get_format_datatype(rb->Format);
else
rb_type = GL_UNSIGNED_NORMALIZED;
/* Used for implementing the following bit of GL_EXT_texture_integer:
* "Per-fragment operations that require floating-point color
* components, including multisample alpha operations, alpha test,
* blending, and dithering, have no effect when the corresponding
* colors are written to an integer color buffer."
*/
integer = (rb_type == GL_INT || rb_type == GL_UNSIGNED_INT);
if(b == 0 && integer)
is_buffer_zero_integer_format = true;
/* _NEW_COLOR */
if (ctx->Color.ColorLogicOpEnabled) {
/* Floating point RTs should have no effect from LogicOp,
* except for disabling of blending, but other types should.
*
* However, from the Sandy Bridge PRM, Vol 2 Par 1, Section 8.1.11,
* "Logic Ops",
*
* "Logic Ops are only supported on *_UNORM surfaces (excluding
* _SRGB variants), otherwise Logic Ops must be DISABLED."
*/
WARN_ONCE(ctx->Color.LogicOp != GL_COPY &&
rb_type != GL_UNSIGNED_NORMALIZED &&
rb_type != GL_FLOAT, "Ignoring %s logic op on %s "
"renderbuffer\n",
_mesa_enum_to_string(ctx->Color.LogicOp),
_mesa_enum_to_string(rb_type));
if (rb_type == GL_UNSIGNED_NORMALIZED) {
blend[b].blend1.logic_op_enable = 1;
blend[b].blend1.logic_op_func =
intel_translate_logic_op(ctx->Color.LogicOp);
}
} else if (ctx->Color.BlendEnabled & (1 << b) && !integer) {
GLenum eqRGB = ctx->Color.Blend[b].EquationRGB;
GLenum eqA = ctx->Color.Blend[b].EquationA;
GLenum srcRGB = ctx->Color.Blend[b].SrcRGB;
GLenum dstRGB = ctx->Color.Blend[b].DstRGB;
GLenum srcA = ctx->Color.Blend[b].SrcA;
GLenum dstA = ctx->Color.Blend[b].DstA;
if (eqRGB == GL_MIN || eqRGB == GL_MAX) {
srcRGB = dstRGB = GL_ONE;
}
if (eqA == GL_MIN || eqA == GL_MAX) {
srcA = dstA = GL_ONE;
}
/* Due to hardware limitations, the destination may have information
* in an alpha channel even when the format specifies no alpha
* channel. In order to avoid getting any incorrect blending due to
* that alpha channel, coerce the blend factors to values that will
* not read the alpha channel, but will instead use the correct
* implicit value for alpha.
*/
if (rb && !_mesa_base_format_has_channel(rb->_BaseFormat, GL_TEXTURE_ALPHA_TYPE))
{
srcRGB = brw_fix_xRGB_alpha(srcRGB);
srcA = brw_fix_xRGB_alpha(srcA);
dstRGB = brw_fix_xRGB_alpha(dstRGB);
dstA = brw_fix_xRGB_alpha(dstA);
}
blend[b].blend0.dest_blend_factor = brw_translate_blend_factor(dstRGB);
blend[b].blend0.source_blend_factor = brw_translate_blend_factor(srcRGB);
blend[b].blend0.blend_func = brw_translate_blend_equation(eqRGB);
blend[b].blend0.ia_dest_blend_factor = brw_translate_blend_factor(dstA);
blend[b].blend0.ia_source_blend_factor = brw_translate_blend_factor(srcA);
blend[b].blend0.ia_blend_func = brw_translate_blend_equation(eqA);
blend[b].blend0.blend_enable = 1;
blend[b].blend0.ia_blend_enable = (srcA != srcRGB ||
dstA != dstRGB ||
eqA != eqRGB);
}
/* See section 8.1.6 "Pre-Blend Color Clamping" of the
* SandyBridge PRM Volume 2 Part 1 for HW requirements.
*
* We do our ARB_color_buffer_float CLAMP_FRAGMENT_COLOR
* clamping in the fragment shader. For its clamping of
* blending, the spec says:
*
* "RESOLVED: For fixed-point color buffers, the inputs and
* the result of the blending equation are clamped. For
* floating-point color buffers, no clamping occurs."
*
* So, generally, we want clamping to the render target's range.
* And, good news, the hardware tables for both pre- and
* post-blend color clamping are either ignored, or any are
* allowed, or clamping is required but RT range clamping is a
* valid option.
*/
blend[b].blend1.pre_blend_clamp_enable = 1;
blend[b].blend1.post_blend_clamp_enable = 1;
blend[b].blend1.clamp_range = BRW_RENDERTARGET_CLAMPRANGE_FORMAT;
/* _NEW_COLOR */
if (ctx->Color.AlphaEnabled && !integer) {
blend[b].blend1.alpha_test_enable = 1;
blend[b].blend1.alpha_test_func =
intel_translate_compare_func(ctx->Color.AlphaFunc);
}
/* _NEW_COLOR */
if (ctx->Color.DitherFlag && !integer) {
blend[b].blend1.dither_enable = 1;
blend[b].blend1.y_dither_offset = 0;
blend[b].blend1.x_dither_offset = 0;
}
blend[b].blend1.write_disable_r = !ctx->Color.ColorMask[b][0];
blend[b].blend1.write_disable_g = !ctx->Color.ColorMask[b][1];
blend[b].blend1.write_disable_b = !ctx->Color.ColorMask[b][2];
blend[b].blend1.write_disable_a = !ctx->Color.ColorMask[b][3];
/* OpenGL specification 3.3 (page 196), section 4.1.3 says:
* "If drawbuffer zero is not NONE and the buffer it references has an
* integer format, the SAMPLE_ALPHA_TO_COVERAGE and SAMPLE_ALPHA_TO_ONE
* operations are skipped."
*/
if(!is_buffer_zero_integer_format) {
/* _NEW_MULTISAMPLE */
blend[b].blend1.alpha_to_coverage =
_mesa_is_multisample_enabled(ctx) && ctx->Multisample.SampleAlphaToCoverage;
/* From SandyBridge PRM, volume 2 Part 1, section 8.2.3, BLEND_STATE:
* DWord 1, Bit 30 (AlphaToOne Enable):
* "If Dual Source Blending is enabled, this bit must be disabled"
*/
WARN_ONCE(ctx->Color.Blend[b]._UsesDualSrc &&
_mesa_is_multisample_enabled(ctx) &&
ctx->Multisample.SampleAlphaToOne,
"HW workaround: disabling alpha to one with dual src "
"blending\n");
if (ctx->Color.Blend[b]._UsesDualSrc)
blend[b].blend1.alpha_to_one = false;
else
blend[b].blend1.alpha_to_one =
_mesa_is_multisample_enabled(ctx) && ctx->Multisample.SampleAlphaToOne;
blend[b].blend1.alpha_to_coverage_dither = (brw->gen >= 7);
}
else {
blend[b].blend1.alpha_to_coverage = false;
blend[b].blend1.alpha_to_one = false;
}
}
/* Point the GPU at the new indirect state. */
if (brw->gen == 6) {
BEGIN_BATCH(4);
OUT_BATCH(_3DSTATE_CC_STATE_POINTERS << 16 | (4 - 2));
OUT_BATCH(brw->cc.blend_state_offset | 1);
OUT_BATCH(0);
OUT_BATCH(0);
ADVANCE_BATCH();
} else {
BEGIN_BATCH(2);
OUT_BATCH(_3DSTATE_BLEND_STATE_POINTERS << 16 | (2 - 2));
OUT_BATCH(brw->cc.blend_state_offset | 1);
ADVANCE_BATCH();
}
}
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);
/* _NEW_TRANSFORM */
if (ctx->Transform.ClipOrigin == GL_UPPER_LEFT) {
raster->front_ccw ^= 1;
}
/*
* 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
*/
{
if (ST_DEBUG & DEBUG_WIREFRAME) {
raster->fill_front = PIPE_POLYGON_MODE_LINE;
raster->fill_back = PIPE_POLYGON_MODE_LINE;
}
else {
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->offset_clamp = ctx->Polygon.OffsetClamp;
}
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 (!st->needs_texcoord_semantic &&
fragProg->Base.InputsRead & VARYING_BIT_PNTC) {
raster->sprite_coord_enable |=
1 << st_get_generic_varying_index(st, VARYING_SLOT_PNTC);
}
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->API != API_OPENGLES2) {
/* PointSizeEnabled is always set in ES2 contexts */
raster->point_size_per_vertex = ctx->VertexProgram.PointSizeEnabled;
}
else {
/* ST_NEW_TESSEVAL_PROGRAM | ST_NEW_GEOMETRY_PROGRAM */
/* We have to check the last bound stage and see if it writes psize */
struct gl_program *last = NULL;
if (ctx->GeometryProgram._Current)
last = &ctx->GeometryProgram._Current->Base;
else if (ctx->TessEvalProgram._Current)
last = &ctx->TessEvalProgram._Current->Base;
else if (ctx->VertexProgram._Current)
last = &ctx->VertexProgram._Current->Base;
if (last)
raster->point_size_per_vertex =
!!(last->OutputsWritten & BITFIELD64_BIT(VARYING_SLOT_PSIZ));
}
}
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 = _mesa_is_multisample_enabled(ctx);
/* _NEW_MULTISAMPLE | _NEW_BUFFERS */
raster->force_persample_interp =
!st->force_persample_in_shader &&
_mesa_is_multisample_enabled(ctx) &&
ctx->Multisample.SampleShading &&
ctx->Multisample.MinSampleShadingValue *
_mesa_geometric_samples(ctx->DrawBuffer) > 1;
/* _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;
/* _NEW_TRANSFORM */
if (ctx->Transform.ClipOrigin == GL_UPPER_LEFT)
raster->bottom_edge_rule ^= 1;
/* ST_NEW_RASTERIZER */
raster->rasterizer_discard = ctx->RasterDiscard;
if (st->edgeflag_culls_prims) {
/* All edge flags are FALSE. Cull the affected faces. */
if (raster->fill_front != PIPE_POLYGON_MODE_FILL)
raster->cull_face |= PIPE_FACE_FRONT;
if (raster->fill_back != PIPE_POLYGON_MODE_FILL)
raster->cull_face |= PIPE_FACE_BACK;
}
/* _NEW_TRANSFORM */
raster->depth_clip = !ctx->Transform.DepthClamp;
raster->clip_plane_enable = ctx->Transform.ClipPlanesEnabled;
raster->clip_halfz = (ctx->Transform.ClipDepthMode == GL_ZERO_TO_ONE);
cso_set_rasterizer(st->cso_context, raster);
}
/**
* Use the list of tokens in the state[] array to find global GL state
* and return it in <value>. Usually, four values are returned in <value>
* but matrix queries may return as many as 16 values.
* This function is used for ARB vertex/fragment programs.
* The program parser will produce the state[] values.
*/
static void
_mesa_fetch_state(struct gl_context *ctx, const gl_state_index state[],
gl_constant_value *val)
{
GLfloat *value = &val->f;
switch (state[0]) {
case STATE_MATERIAL:
{
/* state[1] is either 0=front or 1=back side */
const GLuint face = (GLuint) state[1];
const struct gl_material *mat = &ctx->Light.Material;
assert(face == 0 || face == 1);
/* we rely on tokens numbered so that _BACK_ == _FRONT_+ 1 */
assert(MAT_ATTRIB_FRONT_AMBIENT + 1 == MAT_ATTRIB_BACK_AMBIENT);
/* XXX we could get rid of this switch entirely with a little
* work in arbprogparse.c's parse_state_single_item().
*/
/* state[2] is the material attribute */
switch (state[2]) {
case STATE_AMBIENT:
COPY_4V(value, mat->Attrib[MAT_ATTRIB_FRONT_AMBIENT + face]);
return;
case STATE_DIFFUSE:
COPY_4V(value, mat->Attrib[MAT_ATTRIB_FRONT_DIFFUSE + face]);
return;
case STATE_SPECULAR:
COPY_4V(value, mat->Attrib[MAT_ATTRIB_FRONT_SPECULAR + face]);
return;
case STATE_EMISSION:
COPY_4V(value, mat->Attrib[MAT_ATTRIB_FRONT_EMISSION + face]);
return;
case STATE_SHININESS:
value[0] = mat->Attrib[MAT_ATTRIB_FRONT_SHININESS + face][0];
value[1] = 0.0F;
value[2] = 0.0F;
value[3] = 1.0F;
return;
default:
_mesa_problem(ctx, "Invalid material state in fetch_state");
return;
}
}
case STATE_LIGHT:
{
/* state[1] is the light number */
const GLuint ln = (GLuint) state[1];
/* state[2] is the light attribute */
switch (state[2]) {
case STATE_AMBIENT:
COPY_4V(value, ctx->Light.Light[ln].Ambient);
return;
case STATE_DIFFUSE:
COPY_4V(value, ctx->Light.Light[ln].Diffuse);
return;
case STATE_SPECULAR:
COPY_4V(value, ctx->Light.Light[ln].Specular);
return;
case STATE_POSITION:
COPY_4V(value, ctx->Light.Light[ln].EyePosition);
return;
case STATE_ATTENUATION:
value[0] = ctx->Light.Light[ln].ConstantAttenuation;
value[1] = ctx->Light.Light[ln].LinearAttenuation;
value[2] = ctx->Light.Light[ln].QuadraticAttenuation;
value[3] = ctx->Light.Light[ln].SpotExponent;
return;
case STATE_SPOT_DIRECTION:
COPY_3V(value, ctx->Light.Light[ln].SpotDirection);
value[3] = ctx->Light.Light[ln]._CosCutoff;
return;
case STATE_SPOT_CUTOFF:
value[0] = ctx->Light.Light[ln].SpotCutoff;
return;
case STATE_HALF_VECTOR:
{
static const GLfloat eye_z[] = {0, 0, 1};
GLfloat p[3];
/* Compute infinite half angle vector:
* halfVector = normalize(normalize(lightPos) + (0, 0, 1))
* light.EyePosition.w should be 0 for infinite lights.
*/
COPY_3V(p, ctx->Light.Light[ln].EyePosition);
NORMALIZE_3FV(p);
ADD_3V(value, p, eye_z);
NORMALIZE_3FV(value);
value[3] = 1.0;
}
return;
default:
_mesa_problem(ctx, "Invalid light state in fetch_state");
return;
}
}
case STATE_LIGHTMODEL_AMBIENT:
COPY_4V(value, ctx->Light.Model.Ambient);
return;
case STATE_LIGHTMODEL_SCENECOLOR:
if (state[1] == 0) {
/* front */
GLint i;
for (i = 0; i < 3; i++) {
value[i] = ctx->Light.Model.Ambient[i]
* ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_AMBIENT][i]
+ ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_EMISSION][i];
}
value[3] = ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_DIFFUSE][3];
}
else {
/* back */
GLint i;
for (i = 0; i < 3; i++) {
value[i] = ctx->Light.Model.Ambient[i]
* ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_AMBIENT][i]
+ ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_EMISSION][i];
}
value[3] = ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_DIFFUSE][3];
}
return;
case STATE_LIGHTPROD:
{
const GLuint ln = (GLuint) state[1];
const GLuint face = (GLuint) state[2];
GLint i;
assert(face == 0 || face == 1);
switch (state[3]) {
case STATE_AMBIENT:
for (i = 0; i < 3; i++) {
value[i] = ctx->Light.Light[ln].Ambient[i] *
ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_AMBIENT+face][i];
}
/* [3] = material alpha */
value[3] = ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_AMBIENT+face][3];
return;
case STATE_DIFFUSE:
for (i = 0; i < 3; i++) {
value[i] = ctx->Light.Light[ln].Diffuse[i] *
ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_DIFFUSE+face][i];
}
/* [3] = material alpha */
value[3] = ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_DIFFUSE+face][3];
return;
case STATE_SPECULAR:
for (i = 0; i < 3; i++) {
value[i] = ctx->Light.Light[ln].Specular[i] *
ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_SPECULAR+face][i];
}
/* [3] = material alpha */
value[3] = ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_SPECULAR+face][3];
return;
default:
_mesa_problem(ctx, "Invalid lightprod state in fetch_state");
return;
}
}
case STATE_TEXGEN:
{
/* state[1] is the texture unit */
const GLuint unit = (GLuint) state[1];
/* state[2] is the texgen attribute */
switch (state[2]) {
case STATE_TEXGEN_EYE_S:
COPY_4V(value, ctx->Texture.Unit[unit].GenS.EyePlane);
return;
case STATE_TEXGEN_EYE_T:
COPY_4V(value, ctx->Texture.Unit[unit].GenT.EyePlane);
return;
case STATE_TEXGEN_EYE_R:
COPY_4V(value, ctx->Texture.Unit[unit].GenR.EyePlane);
return;
case STATE_TEXGEN_EYE_Q:
COPY_4V(value, ctx->Texture.Unit[unit].GenQ.EyePlane);
return;
case STATE_TEXGEN_OBJECT_S:
COPY_4V(value, ctx->Texture.Unit[unit].GenS.ObjectPlane);
return;
case STATE_TEXGEN_OBJECT_T:
COPY_4V(value, ctx->Texture.Unit[unit].GenT.ObjectPlane);
return;
case STATE_TEXGEN_OBJECT_R:
COPY_4V(value, ctx->Texture.Unit[unit].GenR.ObjectPlane);
return;
case STATE_TEXGEN_OBJECT_Q:
COPY_4V(value, ctx->Texture.Unit[unit].GenQ.ObjectPlane);
return;
default:
_mesa_problem(ctx, "Invalid texgen state in fetch_state");
return;
}
}
case STATE_TEXENV_COLOR:
{
/* state[1] is the texture unit */
const GLuint unit = (GLuint) state[1];
if (_mesa_get_clamp_fragment_color(ctx, ctx->DrawBuffer))
COPY_4V(value, ctx->Texture.Unit[unit].EnvColor);
else
COPY_4V(value, ctx->Texture.Unit[unit].EnvColorUnclamped);
}
return;
case STATE_FOG_COLOR:
if (_mesa_get_clamp_fragment_color(ctx, ctx->DrawBuffer))
COPY_4V(value, ctx->Fog.Color);
else
COPY_4V(value, ctx->Fog.ColorUnclamped);
return;
case STATE_FOG_PARAMS:
value[0] = ctx->Fog.Density;
value[1] = ctx->Fog.Start;
value[2] = ctx->Fog.End;
value[3] = 1.0f / (ctx->Fog.End - ctx->Fog.Start);
return;
case STATE_CLIPPLANE:
{
const GLuint plane = (GLuint) state[1];
COPY_4V(value, ctx->Transform.EyeUserPlane[plane]);
}
return;
case STATE_POINT_SIZE:
value[0] = ctx->Point.Size;
value[1] = ctx->Point.MinSize;
value[2] = ctx->Point.MaxSize;
value[3] = ctx->Point.Threshold;
return;
case STATE_POINT_ATTENUATION:
value[0] = ctx->Point.Params[0];
value[1] = ctx->Point.Params[1];
value[2] = ctx->Point.Params[2];
value[3] = 1.0F;
return;
case STATE_MODELVIEW_MATRIX:
case STATE_PROJECTION_MATRIX:
case STATE_MVP_MATRIX:
case STATE_TEXTURE_MATRIX:
case STATE_PROGRAM_MATRIX:
{
/* state[0] = modelview, projection, texture, etc. */
/* state[1] = which texture matrix or program matrix */
/* state[2] = first row to fetch */
/* state[3] = last row to fetch */
/* state[4] = transpose, inverse or invtrans */
const GLmatrix *matrix;
const gl_state_index mat = state[0];
const GLuint index = (GLuint) state[1];
const GLuint firstRow = (GLuint) state[2];
const GLuint lastRow = (GLuint) state[3];
const gl_state_index modifier = state[4];
const GLfloat *m;
GLuint row, i;
assert(firstRow < 4);
assert(lastRow < 4);
if (mat == STATE_MODELVIEW_MATRIX) {
matrix = ctx->ModelviewMatrixStack.Top;
}
else if (mat == STATE_PROJECTION_MATRIX) {
matrix = ctx->ProjectionMatrixStack.Top;
}
else if (mat == STATE_MVP_MATRIX) {
matrix = &ctx->_ModelProjectMatrix;
}
else if (mat == STATE_TEXTURE_MATRIX) {
assert(index < ARRAY_SIZE(ctx->TextureMatrixStack));
matrix = ctx->TextureMatrixStack[index].Top;
}
else if (mat == STATE_PROGRAM_MATRIX) {
assert(index < ARRAY_SIZE(ctx->ProgramMatrixStack));
matrix = ctx->ProgramMatrixStack[index].Top;
}
else {
_mesa_problem(ctx, "Bad matrix name in _mesa_fetch_state()");
return;
}
if (modifier == STATE_MATRIX_INVERSE ||
modifier == STATE_MATRIX_INVTRANS) {
/* Be sure inverse is up to date:
*/
_math_matrix_analyse( (GLmatrix*) matrix );
m = matrix->inv;
}
else {
m = matrix->m;
}
if (modifier == STATE_MATRIX_TRANSPOSE ||
modifier == STATE_MATRIX_INVTRANS) {
for (i = 0, row = firstRow; row <= lastRow; row++) {
value[i++] = m[row * 4 + 0];
value[i++] = m[row * 4 + 1];
value[i++] = m[row * 4 + 2];
value[i++] = m[row * 4 + 3];
}
}
else {
for (i = 0, row = firstRow; row <= lastRow; row++) {
value[i++] = m[row + 0];
value[i++] = m[row + 4];
value[i++] = m[row + 8];
value[i++] = m[row + 12];
}
}
}
return;
case STATE_NUM_SAMPLES:
val[0].i = MAX2(1, _mesa_geometric_samples(ctx->DrawBuffer));
return;
case STATE_DEPTH_RANGE:
value[0] = ctx->ViewportArray[0].Near; /* near */
value[1] = ctx->ViewportArray[0].Far; /* far */
value[2] = ctx->ViewportArray[0].Far - ctx->ViewportArray[0].Near; /* far - near */
value[3] = 1.0;
return;
case STATE_FRAGMENT_PROGRAM:
{
/* state[1] = {STATE_ENV, STATE_LOCAL} */
/* state[2] = parameter index */
const int idx = (int) state[2];
switch (state[1]) {
case STATE_ENV:
COPY_4V(value, ctx->FragmentProgram.Parameters[idx]);
return;
case STATE_LOCAL:
if (!ctx->FragmentProgram.Current->arb.LocalParams) {
ctx->FragmentProgram.Current->arb.LocalParams =
rzalloc_array_size(ctx->FragmentProgram.Current,
sizeof(float[4]),
MAX_PROGRAM_LOCAL_PARAMS);
if (!ctx->FragmentProgram.Current->arb.LocalParams)
return;
}
COPY_4V(value,
ctx->FragmentProgram.Current->arb.LocalParams[idx]);
return;
default:
_mesa_problem(ctx, "Bad state switch in _mesa_fetch_state()");
return;
}
}
return;
case STATE_VERTEX_PROGRAM:
{
/* state[1] = {STATE_ENV, STATE_LOCAL} */
/* state[2] = parameter index */
const int idx = (int) state[2];
switch (state[1]) {
case STATE_ENV:
COPY_4V(value, ctx->VertexProgram.Parameters[idx]);
return;
case STATE_LOCAL:
if (!ctx->VertexProgram.Current->arb.LocalParams) {
ctx->VertexProgram.Current->arb.LocalParams =
rzalloc_array_size(ctx->VertexProgram.Current,
sizeof(float[4]),
MAX_PROGRAM_LOCAL_PARAMS);
if (!ctx->VertexProgram.Current->arb.LocalParams)
return;
}
COPY_4V(value,
ctx->VertexProgram.Current->arb.LocalParams[idx]);
return;
default:
_mesa_problem(ctx, "Bad state switch in _mesa_fetch_state()");
return;
}
}
return;
case STATE_NORMAL_SCALE:
ASSIGN_4V(value, ctx->_ModelViewInvScale, 0, 0, 1);
return;
case STATE_INTERNAL:
switch (state[1]) {
case STATE_CURRENT_ATTRIB:
{
const GLuint idx = (GLuint) state[2];
COPY_4V(value, ctx->Current.Attrib[idx]);
}
return;
case STATE_CURRENT_ATTRIB_MAYBE_VP_CLAMPED:
{
const GLuint idx = (GLuint) state[2];
if(ctx->Light._ClampVertexColor &&
(idx == VERT_ATTRIB_COLOR0 ||
idx == VERT_ATTRIB_COLOR1)) {
value[0] = CLAMP(ctx->Current.Attrib[idx][0], 0.0f, 1.0f);
value[1] = CLAMP(ctx->Current.Attrib[idx][1], 0.0f, 1.0f);
value[2] = CLAMP(ctx->Current.Attrib[idx][2], 0.0f, 1.0f);
value[3] = CLAMP(ctx->Current.Attrib[idx][3], 0.0f, 1.0f);
}
else
COPY_4V(value, ctx->Current.Attrib[idx]);
}
return;
case STATE_NORMAL_SCALE:
ASSIGN_4V(value,
ctx->_ModelViewInvScale,
ctx->_ModelViewInvScale,
ctx->_ModelViewInvScale,
1);
return;
case STATE_FOG_PARAMS_OPTIMIZED:
/* for simpler per-vertex/pixel fog calcs. POW (for EXP/EXP2 fog)
* might be more expensive than EX2 on some hw, plus it needs
* another constant (e) anyway. Linear fog can now be done with a
* single MAD.
* linear: fogcoord * -1/(end-start) + end/(end-start)
* exp: 2^-(density/ln(2) * fogcoord)
* exp2: 2^-((density/(sqrt(ln(2))) * fogcoord)^2)
*/
value[0] = (ctx->Fog.End == ctx->Fog.Start)
? 1.0f : (GLfloat)(-1.0F / (ctx->Fog.End - ctx->Fog.Start));
value[1] = ctx->Fog.End * -value[0];
value[2] = (GLfloat)(ctx->Fog.Density * M_LOG2E); /* M_LOG2E == 1/ln(2) */
value[3] = (GLfloat)(ctx->Fog.Density * ONE_DIV_SQRT_LN2);
return;
case STATE_POINT_SIZE_CLAMPED:
{
/* this includes implementation dependent limits, to avoid
* another potentially necessary clamp.
* Note: for sprites, point smooth (point AA) is ignored
* and we'll clamp to MinPointSizeAA and MaxPointSize, because we
* expect drivers will want to say their minimum for AA size is 0.0
* but for non-AA it's 1.0 (because normal points with size below 1.0
* need to get rounded up to 1.0, hence never disappear). GL does
* not specify max clamp size for sprites, other than it needs to be
* at least as large as max AA size, hence use non-AA size there.
*/
GLfloat minImplSize;
GLfloat maxImplSize;
if (ctx->Point.PointSprite) {
minImplSize = ctx->Const.MinPointSizeAA;
maxImplSize = ctx->Const.MaxPointSize;
}
else if (ctx->Point.SmoothFlag || _mesa_is_multisample_enabled(ctx)) {
minImplSize = ctx->Const.MinPointSizeAA;
maxImplSize = ctx->Const.MaxPointSizeAA;
}
else {
minImplSize = ctx->Const.MinPointSize;
maxImplSize = ctx->Const.MaxPointSize;
}
value[0] = ctx->Point.Size;
value[1] = ctx->Point.MinSize >= minImplSize ? ctx->Point.MinSize : minImplSize;
value[2] = ctx->Point.MaxSize <= maxImplSize ? ctx->Point.MaxSize : maxImplSize;
value[3] = ctx->Point.Threshold;
}
return;
case STATE_LIGHT_SPOT_DIR_NORMALIZED:
{
/* here, state[2] is the light number */
/* pre-normalize spot dir */
const GLuint ln = (GLuint) state[2];
COPY_3V(value, ctx->Light.Light[ln]._NormSpotDirection);
value[3] = ctx->Light.Light[ln]._CosCutoff;
}
return;
case STATE_LIGHT_POSITION:
{
const GLuint ln = (GLuint) state[2];
COPY_4V(value, ctx->Light.Light[ln]._Position);
}
return;
case STATE_LIGHT_POSITION_NORMALIZED:
{
const GLuint ln = (GLuint) state[2];
COPY_4V(value, ctx->Light.Light[ln]._Position);
NORMALIZE_3FV( value );
}
return;
case STATE_LIGHT_HALF_VECTOR:
{
const GLuint ln = (GLuint) state[2];
GLfloat p[3];
/* Compute infinite half angle vector:
* halfVector = normalize(normalize(lightPos) + (0, 0, 1))
* light.EyePosition.w should be 0 for infinite lights.
*/
COPY_3V(p, ctx->Light.Light[ln]._Position);
NORMALIZE_3FV(p);
ADD_3V(value, p, ctx->_EyeZDir);
NORMALIZE_3FV(value);
value[3] = 1.0;
}
return;
case STATE_PT_SCALE:
value[0] = ctx->Pixel.RedScale;
value[1] = ctx->Pixel.GreenScale;
value[2] = ctx->Pixel.BlueScale;
value[3] = ctx->Pixel.AlphaScale;
return;
case STATE_PT_BIAS:
value[0] = ctx->Pixel.RedBias;
value[1] = ctx->Pixel.GreenBias;
value[2] = ctx->Pixel.BlueBias;
value[3] = ctx->Pixel.AlphaBias;
return;
case STATE_FB_SIZE:
value[0] = (GLfloat) (ctx->DrawBuffer->Width - 1);
value[1] = (GLfloat) (ctx->DrawBuffer->Height - 1);
value[2] = 0.0F;
value[3] = 0.0F;
return;
case STATE_FB_WPOS_Y_TRANSFORM:
/* A driver may negate this conditional by using ZW swizzle
* instead of XY (based on e.g. some other state). */
if (_mesa_is_user_fbo(ctx->DrawBuffer)) {
/* Identity (XY) followed by flipping Y upside down (ZW). */
value[0] = 1.0F;
value[1] = 0.0F;
value[2] = -1.0F;
value[3] = (GLfloat) ctx->DrawBuffer->Height;
} else {
/* Flipping Y upside down (XY) followed by identity (ZW). */
value[0] = -1.0F;
value[1] = (GLfloat) ctx->DrawBuffer->Height;
value[2] = 1.0F;
value[3] = 0.0F;
}
return;
case STATE_TCS_PATCH_VERTICES_IN:
val[0].i = ctx->TessCtrlProgram.patch_vertices;
return;
case STATE_TES_PATCH_VERTICES_IN:
if (ctx->TessCtrlProgram._Current)
val[0].i = ctx->TessCtrlProgram._Current->info.tess.tcs_vertices_out;
else
val[0].i = ctx->TessCtrlProgram.patch_vertices;
return;
case STATE_ADVANCED_BLENDING_MODE:
val[0].i = ctx->Color.BlendEnabled ? ctx->Color._AdvancedBlendMode : 0;
return;
/* XXX: make sure new tokens added here are also handled in the
* _mesa_program_state_flags() switch, below.
*/
default:
/* Unknown state indexes are silently ignored here.
* Drivers may do something special.
*/
return;
}
return;
default:
_mesa_problem(ctx, "Invalid state in _mesa_fetch_state");
return;
}
}
