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-rw-r--r--src/mesa/drivers/dri/i965/brw_cc.c34
-rw-r--r--src/mesa/drivers/dri/i965/brw_context.c4
-rw-r--r--src/mesa/drivers/dri/i965/brw_vs_emit.c14
-rw-r--r--src/mesa/drivers/dri/i965/brw_wm_surface_state.c31
4 files changed, 69 insertions, 14 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_cc.c b/src/mesa/drivers/dri/i965/brw_cc.c
index d4ccd28c9e..bac1c3a49c 100644
--- a/src/mesa/drivers/dri/i965/brw_cc.c
+++ b/src/mesa/drivers/dri/i965/brw_cc.c
@@ -34,6 +34,7 @@
#include "brw_state.h"
#include "brw_defines.h"
#include "brw_util.h"
+#include "intel_fbo.h"
#include "main/macros.h"
#include "main/enums.h"
@@ -89,6 +90,28 @@ struct brw_cc_unit_key {
GLenum depth_func;
};
+/**
+ * Modify blend function to force destination alpha to 1.0
+ *
+ * If \c function specifies a blend function that uses destination alpha,
+ * replace it with a function that hard-wires destination alpha to 1.0. This
+ * is used when rendering to xRGB targets.
+ */
+static GLenum
+fix_xRGB_alpha(GLenum function)
+{
+ switch (function) {
+ case GL_DST_ALPHA:
+ return GL_ONE;
+
+ case GL_ONE_MINUS_DST_ALPHA:
+ case GL_SRC_ALPHA_SATURATE:
+ return GL_ZERO;
+ }
+
+ return function;
+}
+
static void
cc_unit_populate_key(struct brw_context *brw, struct brw_cc_unit_key *key)
{
@@ -132,6 +155,17 @@ cc_unit_populate_key(struct brw_context *brw, struct brw_cc_unit_key *key)
key->blend_dst_rgb = ctx->Color.BlendDstRGB;
key->blend_src_a = ctx->Color.BlendSrcA;
key->blend_dst_a = ctx->Color.BlendDstA;
+
+ /* 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) {
+ key->blend_src_rgb = fix_xRGB_alpha(key->blend_src_rgb);
+ key->blend_src_a = fix_xRGB_alpha(key->blend_src_a);
+ key->blend_dst_rgb = fix_xRGB_alpha(key->blend_dst_rgb);
+ key->blend_dst_a = fix_xRGB_alpha(key->blend_dst_a);
+ }
}
key->alpha_enabled = ctx->Color.AlphaEnabled;
diff --git a/src/mesa/drivers/dri/i965/brw_context.c b/src/mesa/drivers/dri/i965/brw_context.c
index 8bdda60697..78bea82949 100644
--- a/src/mesa/drivers/dri/i965/brw_context.c
+++ b/src/mesa/drivers/dri/i965/brw_context.c
@@ -111,7 +111,9 @@ GLboolean brwCreateContext( const __GLcontextModes *mesaVis,
ctx->Const.MaxTextureUnits = MIN2(ctx->Const.MaxTextureCoordUnits,
ctx->Const.MaxTextureImageUnits);
ctx->Const.MaxVertexTextureImageUnits = 0; /* no vertex shader textures */
- ctx->Const.MaxCombinedTextureImageUnits = 0;
+ ctx->Const.MaxCombinedTextureImageUnits =
+ ctx->Const.MaxVertexTextureImageUnits +
+ ctx->Const.MaxTextureImageUnits;
/* Mesa limits textures to 4kx4k; it would be nice to fix that someday
*/
diff --git a/src/mesa/drivers/dri/i965/brw_vs_emit.c b/src/mesa/drivers/dri/i965/brw_vs_emit.c
index 00efd3443d..27aac8b54a 100644
--- a/src/mesa/drivers/dri/i965/brw_vs_emit.c
+++ b/src/mesa/drivers/dri/i965/brw_vs_emit.c
@@ -392,6 +392,17 @@ static void emit_sge( struct brw_vs_compile *c,
emit_sop(c, dst, arg0, arg1, BRW_CONDITIONAL_GE);
}
+static void emit_cmp( struct brw_compile *p,
+ struct brw_reg dst,
+ struct brw_reg arg0,
+ struct brw_reg arg1,
+ struct brw_reg arg2 )
+{
+ brw_CMP(p, brw_null_reg(), BRW_CONDITIONAL_L, arg0, brw_imm_f(0));
+ brw_SEL(p, dst, arg1, arg2);
+ brw_set_predicate_control(p, BRW_PREDICATE_NONE);
+}
+
static void emit_max( struct brw_compile *p,
struct brw_reg dst,
struct brw_reg arg0,
@@ -1485,6 +1496,9 @@ void brw_vs_emit(struct brw_vs_compile *c )
brw_MOV(p, brw_acc_reg(), args[2]);
brw_MAC(p, dst, args[0], args[1]);
break;
+ case OPCODE_CMP:
+ emit_cmp(p, dst, args[0], args[1], args[2]);
+ break;
case OPCODE_MAX:
emit_max(p, dst, args[0], args[1]);
break;
diff --git a/src/mesa/drivers/dri/i965/brw_wm_surface_state.c b/src/mesa/drivers/dri/i965/brw_wm_surface_state.c
index 47035cc6fc..8335e5a650 100644
--- a/src/mesa/drivers/dri/i965/brw_wm_surface_state.c
+++ b/src/mesa/drivers/dri/i965/brw_wm_surface_state.c
@@ -94,20 +94,14 @@ static GLuint translate_tex_format( gl_format mesa_format,
return BRW_SURFACEFORMAT_R8G8B8_UNORM;
case MESA_FORMAT_ARGB8888:
- if (internal_format == GL_RGB)
- return BRW_SURFACEFORMAT_B8G8R8X8_UNORM;
- else
- return BRW_SURFACEFORMAT_B8G8R8A8_UNORM;
+ return BRW_SURFACEFORMAT_B8G8R8A8_UNORM;
case MESA_FORMAT_XRGB8888:
return BRW_SURFACEFORMAT_B8G8R8X8_UNORM;
case MESA_FORMAT_RGBA8888_REV:
_mesa_problem(NULL, "unexpected format in i965:translate_tex_format()");
- if (internal_format == GL_RGB)
- return BRW_SURFACEFORMAT_R8G8B8X8_UNORM;
- else
- return BRW_SURFACEFORMAT_R8G8B8A8_UNORM;
+ return BRW_SURFACEFORMAT_R8G8B8A8_UNORM;
case MESA_FORMAT_RGB565:
return BRW_SURFACEFORMAT_B5G6R5_UNORM;
@@ -537,12 +531,16 @@ brw_update_renderbuffer_surface(struct brw_context *brw,
region_bo = region->buffer;
key.surface_type = BRW_SURFACE_2D;
- switch (irb->texformat) {
+ switch (irb->Base.Format) {
+ /* XRGB and ARGB are treated the same here because the chips in this
+ * family cannot render to XRGB targets. This means that we have to
+ * mask writes to alpha (ala glColorMask) and reconfigure the alpha
+ * blending hardware to use GL_ONE (or GL_ZERO) for cases where
+ * GL_DST_ALPHA (or GL_ONE_MINUS_DST_ALPHA) is used.
+ */
case MESA_FORMAT_ARGB8888:
- key.surface_format = BRW_SURFACEFORMAT_B8G8R8A8_UNORM;
- break;
case MESA_FORMAT_XRGB8888:
- key.surface_format = BRW_SURFACEFORMAT_B8G8R8X8_UNORM;
+ key.surface_format = BRW_SURFACEFORMAT_B8G8R8A8_UNORM;
break;
case MESA_FORMAT_RGB565:
key.surface_format = BRW_SURFACEFORMAT_B5G6R5_UNORM;
@@ -554,7 +552,7 @@ brw_update_renderbuffer_surface(struct brw_context *brw,
key.surface_format = BRW_SURFACEFORMAT_B4G4R4A4_UNORM;
break;
default:
- _mesa_problem(ctx, "Bad renderbuffer format: %d\n", irb->texformat);
+ _mesa_problem(ctx, "Bad renderbuffer format: %d\n", irb->Base.Format);
}
key.tiling = region->tiling;
if (brw->intel.intelScreen->driScrnPriv->dri2.enabled) {
@@ -579,6 +577,13 @@ brw_update_renderbuffer_surface(struct brw_context *brw,
/* _NEW_COLOR */
memcpy(key.color_mask, ctx->Color.ColorMask,
sizeof(key.color_mask));
+
+ /* As mentioned above, disable writes to the alpha component when the
+ * renderbuffer is XRGB.
+ */
+ if (ctx->DrawBuffer->Visual.alphaBits == 0)
+ key.color_mask[3] = GL_FALSE;
+
key.color_blend = (!ctx->Color._LogicOpEnabled &&
ctx->Color.BlendEnabled);
generated by cgit v1.2.3 (git 2.39.1) at 2024-08-07 21:40:01 +0000