/**
* Apply stencil test to an array of stencil values (before depth buffering).
* For the values that fail, we'll apply the GL_STENCIL_FAIL operator to
* the stencil values.
*
* @param face 0 or 1 for front or back-face polygons
* @param n number of pixels in the array
* @param stencil array of [n] stencil values (in/out)
* @param mask array [n] of flag: 0=skip the pixel, 1=stencil the pixel,
* values are set to zero where the stencil test fails.
* @param stride stride between stencil values
* @return GL_FALSE = all pixels failed, GL_TRUE = zero or more pixels passed.
*/
static GLboolean
do_stencil_test(struct gl_context *ctx, GLuint face, GLuint n,
GLubyte stencil[], GLubyte mask[], GLint stride)
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
GLubyte *fail = swrast->stencil_temp.buf2;
GLboolean allfail = GL_FALSE;
GLuint i, j;
const GLuint valueMask = ctx->Stencil.ValueMask[face];
const GLubyte ref = (GLubyte) (_mesa_get_stencil_ref(ctx, face) & valueMask);
GLubyte s;
/*
* Perform stencil test. The results of this operation are stored
* in the fail[] array:
* IF fail[i] is non-zero THEN
* the stencil fail operator is to be applied
* ELSE
* the stencil fail operator is not to be applied
* ENDIF
*/
switch (ctx->Stencil.Function[face]) {
case GL_NEVER:
STENCIL_TEST(0);
allfail = GL_TRUE;
break;
case GL_LESS:
STENCIL_TEST(ref < s);
break;
case GL_LEQUAL:
STENCIL_TEST(ref <= s);
break;
case GL_GREATER:
STENCIL_TEST(ref > s);
break;
case GL_GEQUAL:
STENCIL_TEST(ref >= s);
break;
case GL_EQUAL:
STENCIL_TEST(ref == s);
break;
case GL_NOTEQUAL:
STENCIL_TEST(ref != s);
break;
case GL_ALWAYS:
STENCIL_TEST(1);
break;
default:
_mesa_problem(ctx, "Bad stencil func in gl_stencil_span");
return 0;
}
if (ctx->Stencil.FailFunc[face] != GL_KEEP) {
apply_stencil_op(ctx, ctx->Stencil.FailFunc[face], face, n, stencil,
fail, stride);
}
return !allfail;
}
static void
gen6_upload_color_calc_state(struct brw_context *brw)
{
struct gl_context *ctx = &brw->ctx;
struct gen6_color_calc_state *cc;
cc = brw_state_batch(brw, AUB_TRACE_CC_STATE,
sizeof(*cc), 64, &brw->cc.state_offset);
memset(cc, 0, sizeof(*cc));
/* _NEW_COLOR */
cc->cc0.alpha_test_format = BRW_ALPHATEST_FORMAT_UNORM8;
UNCLAMPED_FLOAT_TO_UBYTE(cc->cc1.alpha_ref_fi.ui, ctx->Color.AlphaRef);
if (brw->gen < 9) {
/* _NEW_STENCIL */
cc->cc0.stencil_ref = _mesa_get_stencil_ref(ctx, 0);
cc->cc0.bf_stencil_ref =
_mesa_get_stencil_ref(ctx, ctx->Stencil._BackFace);
}
/* _NEW_COLOR */
cc->constant_r = ctx->Color.BlendColorUnclamped[0];
cc->constant_g = ctx->Color.BlendColorUnclamped[1];
cc->constant_b = ctx->Color.BlendColorUnclamped[2];
cc->constant_a = ctx->Color.BlendColorUnclamped[3];
/* 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(0);
OUT_BATCH(0);
OUT_BATCH(brw->cc.state_offset | 1);
ADVANCE_BATCH();
} else {
BEGIN_BATCH(2);
OUT_BATCH(_3DSTATE_CC_STATE_POINTERS << 16 | (2 - 2));
OUT_BATCH(brw->cc.state_offset | 1);
ADVANCE_BATCH();
}
}
/**
* Apply the given stencil operator to the array of stencil values.
* Don't touch stencil[i] if mask[i] is zero.
* @param n number of stencil values
* @param oper the stencil buffer operator
* @param face 0 or 1 for front or back face operation
* @param stencil array of stencil values (in/out)
* @param mask array [n] of flag: 1=apply operator, 0=don't apply operator
* @param stride stride between stencil values
*/
static void
apply_stencil_op(const struct gl_context *ctx, GLenum oper, GLuint face,
GLuint n, GLubyte stencil[], const GLubyte mask[],
GLint stride)
{
const GLubyte ref = _mesa_get_stencil_ref(ctx, face);
const GLubyte wrtmask = ctx->Stencil.WriteMask[face];
const GLubyte invmask = (GLubyte) (~wrtmask);
GLuint i, j;
switch (oper) {
case GL_KEEP:
/* do nothing */
break;
case GL_ZERO:
/* replace stencil buf values with zero */
STENCIL_OP(0);
break;
case GL_REPLACE:
/* replace stencil buf values with ref value */
STENCIL_OP(ref);
break;
case GL_INCR:
/* increment stencil buf values, with clamping */
STENCIL_OP(clamp(s + 1));
break;
case GL_DECR:
/* increment stencil buf values, with clamping */
STENCIL_OP(clamp(s - 1));
break;
case GL_INCR_WRAP_EXT:
/* increment stencil buf values, without clamping */
STENCIL_OP(s + 1);
break;
case GL_DECR_WRAP_EXT:
/* increment stencil buf values, without clamping */
STENCIL_OP(s - 1);
break;
case GL_INVERT:
/* replace stencil buf values with inverted value */
STENCIL_OP(~s);
break;
default:
_mesa_problem(ctx, "Bad stencil op in apply_stencil_op");
}
}
void
nv04_emit_control(struct gl_context *ctx, int emit)
{
struct nv04_context *nv04 = to_nv04_context(ctx);
struct gl_framebuffer *fb = ctx->DrawBuffer;
int cull = ctx->Polygon.CullFaceMode;
int front = ctx->Polygon.FrontFace;
nv04->ctrl[0] = NV04_TEXTURED_TRIANGLE_CONTROL_Z_FORMAT_FIXED |
NV04_TEXTURED_TRIANGLE_CONTROL_ORIGIN_CORNER;
nv04->ctrl[1] = 0;
nv04->ctrl[2] = 0;
/* Dithering. */
if (ctx->Color.DitherFlag)
nv04->ctrl[0] |= NV04_TEXTURED_TRIANGLE_CONTROL_DITHER_ENABLE;
/* Cull mode. */
if (!ctx->Polygon.CullFlag)
nv04->ctrl[0] |= NV04_TEXTURED_TRIANGLE_CONTROL_CULL_MODE_NONE;
else if (cull == GL_FRONT_AND_BACK)
nv04->ctrl[0] |= NV04_TEXTURED_TRIANGLE_CONTROL_CULL_MODE_BOTH;
else
nv04->ctrl[0] |= (cull == GL_FRONT) ^ (front == GL_CCW) ?
NV04_TEXTURED_TRIANGLE_CONTROL_CULL_MODE_CW :
NV04_TEXTURED_TRIANGLE_CONTROL_CULL_MODE_CCW;
/* Depth test. */
if (ctx->Depth.Test && fb->Visual.depthBits > 0)
nv04->ctrl[0] |= NV04_TEXTURED_TRIANGLE_CONTROL_Z_ENABLE;
if (ctx->Depth.Mask && fb->Visual.depthBits > 0)
nv04->ctrl[0] |= NV04_TEXTURED_TRIANGLE_CONTROL_Z_WRITE;
nv04->ctrl[0] |= get_comparison_op(ctx->Depth.Func) << 16;
/* Alpha test. */
if (ctx->Color.AlphaEnabled)
nv04->ctrl[0] |= NV04_TEXTURED_TRIANGLE_CONTROL_ALPHA_ENABLE;
nv04->ctrl[0] |= get_comparison_op(ctx->Color.AlphaFunc) << 8 |
FLOAT_TO_UBYTE(ctx->Color.AlphaRef);
/* Color mask. */
if (ctx->Color.ColorMask[0][RCOMP])
nv04->ctrl[0] |= NV04_MULTITEX_TRIANGLE_CONTROL0_RED_WRITE;
if (ctx->Color.ColorMask[0][GCOMP])
nv04->ctrl[0] |= NV04_MULTITEX_TRIANGLE_CONTROL0_GREEN_WRITE;
if (ctx->Color.ColorMask[0][BCOMP])
nv04->ctrl[0] |= NV04_MULTITEX_TRIANGLE_CONTROL0_BLUE_WRITE;
if (ctx->Color.ColorMask[0][ACOMP])
nv04->ctrl[0] |= NV04_MULTITEX_TRIANGLE_CONTROL0_ALPHA_WRITE;
/* Stencil test. */
if (ctx->Stencil.WriteMask[0])
nv04->ctrl[0] |= NV04_MULTITEX_TRIANGLE_CONTROL0_STENCIL_WRITE;
if (_mesa_stencil_is_enabled(ctx))
nv04->ctrl[1] |= NV04_MULTITEX_TRIANGLE_CONTROL1_STENCIL_ENABLE;
nv04->ctrl[1] |= get_comparison_op(ctx->Stencil.Function[0]) << 4 |
_mesa_get_stencil_ref(ctx, 0) << 8 |
ctx->Stencil.ValueMask[0] << 16 |
ctx->Stencil.WriteMask[0] << 24;
nv04->ctrl[2] |= get_stencil_op(ctx->Stencil.ZPassFunc[0]) << 8 |
get_stencil_op(ctx->Stencil.ZFailFunc[0]) << 4 |
get_stencil_op(ctx->Stencil.FailFunc[0]);
}
/**
* Creates the state cache entry for the given CC unit key.
*/
static void upload_cc_unit(struct brw_context *brw)
{
struct gl_context *ctx = &brw->ctx;
struct brw_cc_unit_state *cc;
cc = brw_state_batch(brw, AUB_TRACE_CC_STATE,
sizeof(*cc), 64, &brw->cc.state_offset);
memset(cc, 0, sizeof(*cc));
/* _NEW_STENCIL | _NEW_BUFFERS */
if (ctx->Stencil._Enabled) {
const unsigned back = ctx->Stencil._BackFace;
cc->cc0.stencil_enable = 1;
cc->cc0.stencil_func =
intel_translate_compare_func(ctx->Stencil.Function[0]);
cc->cc0.stencil_fail_op =
intel_translate_stencil_op(ctx->Stencil.FailFunc[0]);
cc->cc0.stencil_pass_depth_fail_op =
intel_translate_stencil_op(ctx->Stencil.ZFailFunc[0]);
cc->cc0.stencil_pass_depth_pass_op =
intel_translate_stencil_op(ctx->Stencil.ZPassFunc[0]);
cc->cc1.stencil_ref = _mesa_get_stencil_ref(ctx, 0);
cc->cc1.stencil_write_mask = ctx->Stencil.WriteMask[0];
cc->cc1.stencil_test_mask = ctx->Stencil.ValueMask[0];
if (ctx->Stencil._TestTwoSide) {
cc->cc0.bf_stencil_enable = 1;
cc->cc0.bf_stencil_func =
intel_translate_compare_func(ctx->Stencil.Function[back]);
cc->cc0.bf_stencil_fail_op =
intel_translate_stencil_op(ctx->Stencil.FailFunc[back]);
cc->cc0.bf_stencil_pass_depth_fail_op =
intel_translate_stencil_op(ctx->Stencil.ZFailFunc[back]);
cc->cc0.bf_stencil_pass_depth_pass_op =
intel_translate_stencil_op(ctx->Stencil.ZPassFunc[back]);
cc->cc1.bf_stencil_ref = _mesa_get_stencil_ref(ctx, back);
cc->cc2.bf_stencil_write_mask = ctx->Stencil.WriteMask[back];
cc->cc2.bf_stencil_test_mask = ctx->Stencil.ValueMask[back];
}
/* Not really sure about this:
*/
if (ctx->Stencil.WriteMask[0] ||
(ctx->Stencil._TestTwoSide && ctx->Stencil.WriteMask[back]))
cc->cc0.stencil_write_enable = 1;
}
/* _NEW_COLOR */
if (ctx->Color.ColorLogicOpEnabled && ctx->Color.LogicOp != GL_COPY) {
cc->cc2.logicop_enable = 1;
cc->cc5.logicop_func = intel_translate_logic_op(ctx->Color.LogicOp);
} else if (ctx->Color.BlendEnabled) {
GLenum eqRGB = ctx->Color.Blend[0].EquationRGB;
GLenum eqA = ctx->Color.Blend[0].EquationA;
GLenum srcRGB = ctx->Color.Blend[0].SrcRGB;
GLenum dstRGB = ctx->Color.Blend[0].DstRGB;
GLenum srcA = ctx->Color.Blend[0].SrcA;
GLenum dstA = ctx->Color.Blend[0].DstA;
/* If the renderbuffer is XRGB, we have to frob the blend function to
* force the destination alpha to 1.0. This means replacing GL_DST_ALPHA
* with GL_ONE and GL_ONE_MINUS_DST_ALPHA with GL_ZERO.
*/
if (ctx->DrawBuffer->Visual.alphaBits == 0) {
srcRGB = brw_fix_xRGB_alpha(srcRGB);
srcA = brw_fix_xRGB_alpha(srcA);
dstRGB = brw_fix_xRGB_alpha(dstRGB);
dstA = brw_fix_xRGB_alpha(dstA);
}
if (eqRGB == GL_MIN || eqRGB == GL_MAX) {
srcRGB = dstRGB = GL_ONE;
}
if (eqA == GL_MIN || eqA == GL_MAX) {
srcA = dstA = GL_ONE;
}
cc->cc6.dest_blend_factor = brw_translate_blend_factor(dstRGB);
cc->cc6.src_blend_factor = brw_translate_blend_factor(srcRGB);
cc->cc6.blend_function = brw_translate_blend_equation(eqRGB);
cc->cc5.ia_dest_blend_factor = brw_translate_blend_factor(dstA);
cc->cc5.ia_src_blend_factor = brw_translate_blend_factor(srcA);
cc->cc5.ia_blend_function = brw_translate_blend_equation(eqA);
cc->cc3.blend_enable = 1;
cc->cc3.ia_blend_enable = (srcA != srcRGB ||
dstA != dstRGB ||
eqA != eqRGB);
}
/* _NEW_BUFFERS */
if (ctx->Color.AlphaEnabled && ctx->DrawBuffer->_NumColorDrawBuffers <= 1) {
cc->cc3.alpha_test = 1;
cc->cc3.alpha_test_func =
intel_translate_compare_func(ctx->Color.AlphaFunc);
cc->cc3.alpha_test_format = BRW_ALPHATEST_FORMAT_UNORM8;
UNCLAMPED_FLOAT_TO_UBYTE(cc->cc7.alpha_ref.ub[0], ctx->Color.AlphaRef);
}
if (ctx->Color.DitherFlag) {
cc->cc5.dither_enable = 1;
cc->cc6.y_dither_offset = 0;
cc->cc6.x_dither_offset = 0;
}
/* _NEW_DEPTH */
if (ctx->Depth.Test) {
cc->cc2.depth_test = 1;
cc->cc2.depth_test_function =
intel_translate_compare_func(ctx->Depth.Func);
cc->cc2.depth_write_enable = ctx->Depth.Mask;
}
if (brw->stats_wm || unlikely(INTEL_DEBUG & DEBUG_STATS))
cc->cc5.statistics_enable = 1;
/* CACHE_NEW_CC_VP */
cc->cc4.cc_viewport_state_offset = (brw->batch.bo->offset +
brw->cc.vp_offset) >> 5; /* reloc */
brw->state.dirty.cache |= CACHE_NEW_CC_UNIT;
/* Emit CC viewport relocation */
drm_intel_bo_emit_reloc(brw->batch.bo,
(brw->cc.state_offset +
offsetof(struct brw_cc_unit_state, cc4)),
brw->batch.bo, brw->cc.vp_offset,
I915_GEM_DOMAIN_INSTRUCTION, 0);
}
static void
update_depth_stencil_alpha(struct st_context *st)
{
struct pipe_depth_stencil_alpha_state *dsa = &st->state.depth_stencil;
struct pipe_stencil_ref sr;
struct gl_context *ctx = st->ctx;
memset(dsa, 0, sizeof(*dsa));
memset(&sr, 0, sizeof(sr));
if (ctx->DrawBuffer->Visual.depthBits > 0) {
if (ctx->Depth.Test) {
dsa->depth.enabled = 1;
dsa->depth.writemask = ctx->Depth.Mask;
dsa->depth.func = st_compare_func_to_pipe(ctx->Depth.Func);
}
if (ctx->Depth.BoundsTest) {
dsa->depth.bounds_test = 1;
dsa->depth.bounds_min = ctx->Depth.BoundsMin;
dsa->depth.bounds_max = ctx->Depth.BoundsMax;
}
}
if (ctx->Stencil.Enabled && ctx->DrawBuffer->Visual.stencilBits > 0) {
dsa->stencil[0].enabled = 1;
dsa->stencil[0].func = st_compare_func_to_pipe(ctx->Stencil.Function[0]);
dsa->stencil[0].fail_op = gl_stencil_op_to_pipe(ctx->Stencil.FailFunc[0]);
dsa->stencil[0].zfail_op = gl_stencil_op_to_pipe(ctx->Stencil.ZFailFunc[0]);
dsa->stencil[0].zpass_op = gl_stencil_op_to_pipe(ctx->Stencil.ZPassFunc[0]);
dsa->stencil[0].valuemask = ctx->Stencil.ValueMask[0] & 0xff;
dsa->stencil[0].writemask = ctx->Stencil.WriteMask[0] & 0xff;
sr.ref_value[0] = _mesa_get_stencil_ref(ctx, 0);
if (ctx->Stencil._TestTwoSide) {
const GLuint back = ctx->Stencil._BackFace;
dsa->stencil[1].enabled = 1;
dsa->stencil[1].func = st_compare_func_to_pipe(ctx->Stencil.Function[back]);
dsa->stencil[1].fail_op = gl_stencil_op_to_pipe(ctx->Stencil.FailFunc[back]);
dsa->stencil[1].zfail_op = gl_stencil_op_to_pipe(ctx->Stencil.ZFailFunc[back]);
dsa->stencil[1].zpass_op = gl_stencil_op_to_pipe(ctx->Stencil.ZPassFunc[back]);
dsa->stencil[1].valuemask = ctx->Stencil.ValueMask[back] & 0xff;
dsa->stencil[1].writemask = ctx->Stencil.WriteMask[back] & 0xff;
sr.ref_value[1] = _mesa_get_stencil_ref(ctx, back);
}
else {
/* This should be unnecessary. Drivers must not expect this to
* contain valid data, except the enabled bit
*/
dsa->stencil[1] = dsa->stencil[0];
dsa->stencil[1].enabled = 0;
sr.ref_value[1] = sr.ref_value[0];
}
}
if (ctx->Color.AlphaEnabled &&
!(ctx->DrawBuffer->_IntegerBuffers & 0x1)) {
dsa->alpha.enabled = 1;
dsa->alpha.func = st_compare_func_to_pipe(ctx->Color.AlphaFunc);
dsa->alpha.ref_value = ctx->Color.AlphaRefUnclamped;
}
cso_set_depth_stencil_alpha(st->cso_context, dsa);
cso_set_stencil_ref(st->cso_context, &sr);
}
