[Mesa-dev] [PATCH 2/8] intel: Implement ARB_texture_storage

[Ian Romanick]

From: Ian Romanick <ian.d.romanick at intel.com>

This is basically cut-and-paste from the swrast implementation, and it
could probably be (slightly) more optimal.

Signed-off-by: Ian Romanick <ian.d.romanick at intel.com>
---
 src/mesa/drivers/dri/intel/intel_extensions.c |    1 +
 src/mesa/drivers/dri/intel/intel_tex.c        |   26 +++++++++++++++++++++++++
 2 files changed, 27 insertions(+), 0 deletions(-)

diff --git a/src/mesa/drivers/dri/intel/intel_extensions.c b/src/mesa/drivers/dri/intel/intel_extensions.c
index 76b56a2..746184f 100755
--- a/src/mesa/drivers/dri/intel/intel_extensions.c
+++ b/src/mesa/drivers/dri/intel/intel_extensions.c
@@ -57,6 +57,7 @@ intelInitExtensions(struct gl_context *ctx)
    ctx->Extensions.ARB_texture_env_combine = true;
    ctx->Extensions.ARB_texture_env_crossbar = true;
    ctx->Extensions.ARB_texture_env_dot3 = true;
+   ctx->Extensions.ARB_texture_storage = true;
    ctx->Extensions.ARB_vertex_array_object = true;
    ctx->Extensions.ARB_vertex_program = true;
    ctx->Extensions.ARB_vertex_shader = true;
diff --git a/src/mesa/drivers/dri/intel/intel_tex.c b/src/mesa/drivers/dri/intel/intel_tex.c
index 92481b9..4abe988 100644
--- a/src/mesa/drivers/dri/intel/intel_tex.c
+++ b/src/mesa/drivers/dri/intel/intel_tex.c
@@ -110,6 +110,31 @@ intel_alloc_texture_image_buffer(struct gl_context *ctx,
    return true;
 }
 
+/**
+ * Called via ctx->Driver.AllocTextureStorage()
+ * Just have to allocate memory for the texture images.
+ */
+static GLboolean
+intel_alloc_texture_storage(struct gl_context *ctx,
+                            struct gl_texture_object *texObj,
+                            GLsizei levels, GLsizei width,
+                            GLsizei height, GLsizei depth)
+{
+   const int numFaces = (texObj->Target == GL_TEXTURE_CUBE_MAP) ? 6 : 1;
+   int face;
+   int level;
+
+   for (face = 0; face < numFaces; face++) {
+      for (level = 0; level < levels; level++) {
+         struct gl_texture_image *const texImage = texObj->Image[face][level];
+         if (!intel_alloc_texture_image_buffer(ctx, texImage))
+            return false;
+      }
+   }
+
+   return true;
+}
+
 static void
 intel_free_texture_image_buffer(struct gl_context * ctx,
 				struct gl_texture_image *texImage)
@@ -191,6 +216,7 @@ intelInitTextureFuncs(struct dd_function_table *functions)
    functions->DeleteTexture = intelDeleteTextureObject;
    functions->AllocTextureImageBuffer = intel_alloc_texture_image_buffer;
    functions->FreeTextureImageBuffer = intel_free_texture_image_buffer;
+   functions->AllocTextureStorage = intel_alloc_texture_storage;
    functions->MapTextureImage = intel_map_texture_image;
    functions->UnmapTextureImage = intel_unmap_texture_image;
 }
-- 
1.7.6.5