From 902e401a384a8213d1239aae42bc2b7071ad6bd8 Mon Sep 17 00:00:00 2001
From: Eric Anholt <eric@anholt.net>
Date: Sat, 26 Jul 2008 17:12:04 -0700
Subject: [PATCH] intel: Don't return a renderbuffer with alpha when just
 GL_RGB is requested.

Fixes oglconform rbGetterFuncs testcase.  The span code for this mode hasn't
actually been tested.
---
 src/mesa/drivers/dri/intel/intel_fbo.c  |  8 +++++
 src/mesa/drivers/dri/intel/intel_span.c | 64 +++++++++++++++++++++++++++++++++
 2 files changed, 72 insertions(+)

diff --git a/src/mesa/drivers/dri/intel/intel_fbo.c b/src/mesa/drivers/dri/intel/intel_fbo.c
index 254f3efae0c..5bd2ebfdcf6 100644
--- a/src/mesa/drivers/dri/intel/intel_fbo.c
+++ b/src/mesa/drivers/dri/intel/intel_fbo.c
@@ -212,6 +212,14 @@ intel_alloc_renderbuffer_storage(GLcontext * ctx, struct gl_renderbuffer *rb,
    case GL_RGB10:
    case GL_RGB12:
    case GL_RGB16:
+      rb->_ActualFormat = GL_RGB8;
+      rb->DataType = GL_UNSIGNED_BYTE;
+      rb->RedBits = 8;
+      rb->GreenBits = 8;
+      rb->BlueBits = 8;
+      rb->AlphaBits = 0;
+      cpp = 4;
+      break;
    case GL_RGBA:
    case GL_RGBA2:
    case GL_RGBA4:
diff --git a/src/mesa/drivers/dri/intel/intel_span.c b/src/mesa/drivers/dri/intel/intel_span.c
index 06f7c9b4b7d..079b9e6a9d9 100644
--- a/src/mesa/drivers/dri/intel/intel_span.c
+++ b/src/mesa/drivers/dri/intel/intel_span.c
@@ -74,6 +74,15 @@ pread_32(struct intel_renderbuffer *irb, uint32_t offset)
    return *(uint32_t *)(irb->span_cache + (offset & (SPAN_CACHE_SIZE - 1)));
 }
 
+static uint32_t
+pread_xrgb8888(struct intel_renderbuffer *irb, uint32_t offset)
+{
+   get_span_cache(irb, offset);
+
+   return *(uint32_t *)(irb->span_cache + (offset & (SPAN_CACHE_SIZE - 1))) |
+      0xff000000;
+}
+
 static uint16_t
 pread_16(struct intel_renderbuffer *irb, uint32_t offset)
 {
@@ -99,6 +108,14 @@ pwrite_32(struct intel_renderbuffer *irb, uint32_t offset, uint32_t val)
 }
 
 static void
+pwrite_xrgb8888(struct intel_renderbuffer *irb, uint32_t offset, uint32_t val)
+{
+   clear_span_cache(irb);
+
+   dri_bo_subdata(irb->region->buffer, offset, 3, &val);
+}
+
+static void
 pwrite_16(struct intel_renderbuffer *irb, uint32_t offset, uint16_t val)
 {
    clear_span_cache(irb);
@@ -301,6 +318,17 @@ static uint32_t y_tile_swizzle(struct intel_renderbuffer *irb,
 #define PUT_VALUE(X, Y, V) pwrite_32(irb, no_tile_swizzle(irb, intel, X, Y), V)
 #include "spantmp2.h"
 
+/* 32 bit, xRGB8888 color spanline and pixel functions
+ */
+#define SPANTMP_PIXEL_FMT GL_BGRA
+#define SPANTMP_PIXEL_TYPE GL_UNSIGNED_INT_8_8_8_8_REV
+
+#define TAG(x)    intel##x##_xRGB8888
+#define TAG2(x,y) intel##x##_xRGB8888##y
+#define GET_VALUE(X, Y) pread_xrgb8888(irb, no_tile_swizzle(irb, intel, X, Y))
+#define PUT_VALUE(X, Y, V) pwrite_xrgb8888(irb, no_tile_swizzle(irb, intel, X, Y), V)
+#include "spantmp2.h"
+
 /* 16 bit RGB565 color tile spanline and pixel functions
  */
 
@@ -343,6 +371,27 @@ static uint32_t y_tile_swizzle(struct intel_renderbuffer *irb,
 #define PUT_VALUE(X, Y, V) pwrite_32(irb, y_tile_swizzle(irb, intel, X, Y), V)
 #include "spantmp2.h"
 
+/* 32 bit xRGB888 color tile spanline and pixel functions
+ */
+
+#define SPANTMP_PIXEL_FMT GL_BGRA
+#define SPANTMP_PIXEL_TYPE GL_UNSIGNED_INT_8_8_8_8_REV
+
+#define TAG(x)    intel_XTile_##x##_xRGB8888
+#define TAG2(x,y) intel_XTile_##x##_xRGB8888##y
+#define GET_VALUE(X, Y) pread_xrgb8888(irb, x_tile_swizzle(irb, intel, X, Y))
+#define PUT_VALUE(X, Y, V) pwrite_xrgb8888(irb, x_tile_swizzle(irb, intel, X, Y), V)
+#include "spantmp2.h"
+
+#define SPANTMP_PIXEL_FMT GL_BGRA
+#define SPANTMP_PIXEL_TYPE GL_UNSIGNED_INT_8_8_8_8_REV
+
+#define TAG(x)    intel_YTile_##x##_xRGB8888
+#define TAG2(x,y) intel_YTile_##x##_xRGB8888##y
+#define GET_VALUE(X, Y) pread_xrgb8888(irb, y_tile_swizzle(irb, intel, X, Y))
+#define PUT_VALUE(X, Y, V) pwrite_xrgb8888(irb, y_tile_swizzle(irb, intel, X, Y), V)
+#include "spantmp2.h"
+
 #define LOCAL_DEPTH_VARS						\
    struct intel_context *intel = intel_context(ctx);			\
    struct intel_renderbuffer *irb = intel_renderbuffer(rb);		\
@@ -677,6 +726,21 @@ intel_set_span_functions(struct intel_context *intel,
 	 break;
       }
    }
+   else if (rb->_ActualFormat == GL_RGB8) {
+      /* 8888 RGBx */
+      switch (tiling) {
+      case I915_TILING_NONE:
+      default:
+	 intelInitPointers_xRGB8888(rb);
+	 break;
+      case I915_TILING_X:
+	 intel_XTile_InitPointers_xRGB8888(rb);
+	 break;
+      case I915_TILING_Y:
+	 intel_YTile_InitPointers_xRGB8888(rb);
+	 break;
+      }
+   }
    else if (rb->_ActualFormat == GL_RGBA8) {
       /* 8888 RGBA */
       switch (tiling) {
-- 
2.11.0