Merge branch 'llvm-cliptest-viewport'

[mesa.git] / src / mesa / drivers / dri / intel / intel_tex_format.c

diff --git a/src/mesa/drivers/dri/intel/intel_tex_format.c b/src/mesa/drivers/dri/intel/intel_tex_format.c
index 5f813c0efa2d2c2e23d1d8c70e7d8b13ab75f4d2..9d73a2fb3757535e0e98d780fe427ddd9b9615eb 100644 (file)
--- a/src/mesa/drivers/dri/intel/intel_tex_format.c
+++ b/src/mesa/drivers/dri/intel/intel_tex_format.c
@@ -15,11 +15,10 @@
  * immediately after sampling...
  */
 gl_format
-intelChooseTextureFormat(GLcontext * ctx, GLint internalFormat,
+intelChooseTextureFormat(struct gl_context * ctx, GLint internalFormat,
                          GLenum format, GLenum type)
 {
    struct intel_context *intel = intel_context(ctx);
-   const GLboolean do32bpt = (intel->ctx.Visual.rgbBits >= 24);
 
 #if 0
    printf("%s intFmt=0x%x format=0x%x type=0x%x\n",
@@ -30,39 +29,28 @@ intelChooseTextureFormat(GLcontext * ctx, GLint internalFormat,
    case 4:
    case GL_RGBA:
    case GL_COMPRESSED_RGBA:
-      if (format == GL_BGRA) {
-         if (type == GL_UNSIGNED_BYTE || type == GL_UNSIGNED_INT_8_8_8_8_REV) {
-            return MESA_FORMAT_ARGB8888;
-         }
-         else if (type == GL_UNSIGNED_SHORT_4_4_4_4_REV) {
-            return MESA_FORMAT_ARGB4444;
-         }
-         else if (type == GL_UNSIGNED_SHORT_1_5_5_5_REV) {
-            return MESA_FORMAT_ARGB1555;
-         }
-      }
-      return do32bpt ? MESA_FORMAT_ARGB8888 : MESA_FORMAT_ARGB4444;
+      if (type == GL_UNSIGNED_SHORT_4_4_4_4_REV)
+        return MESA_FORMAT_ARGB4444;
+      else if (type == GL_UNSIGNED_SHORT_1_5_5_5_REV)
+        return MESA_FORMAT_ARGB1555;
+      else
+        return MESA_FORMAT_ARGB8888;
 
    case 3:
    case GL_RGB:
    case GL_COMPRESSED_RGB:
-      if (format == GL_RGB && type == GL_UNSIGNED_SHORT_5_6_5) {
-         return MESA_FORMAT_RGB565;
-      }
-      if (do32bpt) {
-        if (intel->has_xrgb_textures)
-           return MESA_FORMAT_XRGB8888;
-        else
-           return MESA_FORMAT_ARGB8888;
-      } else {
+      if (type == GL_UNSIGNED_SHORT_5_6_5)
         return MESA_FORMAT_RGB565;
-      }
+      else if (intel->has_xrgb_textures)
+        return MESA_FORMAT_XRGB8888;
+      else
+        return MESA_FORMAT_ARGB8888;
 
    case GL_RGBA8:
    case GL_RGB10_A2:
    case GL_RGBA12:
    case GL_RGBA16:
-      return do32bpt ? MESA_FORMAT_ARGB8888 : MESA_FORMAT_ARGB4444;
+      return MESA_FORMAT_ARGB8888;
 
    case GL_RGBA4:
    case GL_RGBA2:
@@ -105,6 +93,10 @@ intelChooseTextureFormat(GLcontext * ctx, GLint internalFormat,
    case GL_LUMINANCE12_ALPHA4:
    case GL_LUMINANCE12_ALPHA12:
    case GL_LUMINANCE16_ALPHA16:
+      /* i915 could implement this mode using MT_32BIT_RG1616.  However, this
+       * would require an extra swizzle instruction in the fragment shader to
+       * convert the { R, G, 1.0, 1.0 } to { R, R, R, G }.
+       */
 #ifndef I915
       return MESA_FORMAT_AL1616;
 #else
@@ -205,6 +197,22 @@ intelChooseTextureFormat(GLcontext * ctx, GLint internalFormat,
    case GL_RGBA_SNORM:
    case GL_RGBA8_SNORM:
       return MESA_FORMAT_SIGNED_RGBA8888_REV;
+
+   /* i915 can do a RG16, but it can't do any of the other RED or RG formats.
+    * In addition, it only implements the broken D3D mode where undefined
+    * components are read as 1.0.  I'm not sure who thought reading
+    * { R, G, 1.0, 1.0 } from a red-green texture would be useful.
+    */
+   case GL_RED:
+   case GL_R8:
+      return MESA_FORMAT_R8;
+   case GL_R16:
+      return MESA_FORMAT_R16;
+   case GL_RG:
+   case GL_RG8:
+      return MESA_FORMAT_RG88;
+   case GL_RG16:
+      return MESA_FORMAT_RG1616;
 #endif
 
    default: