[Mesa-dev] [PATCH 4/5] mesa: rewrite glTexStorage() code
Brian Paul
brian.e.paul at gmail.com
Sat Sep 15 09:30:34 PDT 2012
From: Brian Paul <brianp at vmware.com>
Simplify the code and make it more like the other glTexImage commands.
Call _mesa_legal_texture_dimensions() to validate width, height, depth.
Call ctx->Driver.TestProxyTexImage() to make sure texture is not too large.
---
src/mesa/main/texstorage.c | 153 +++++++++++++++++++++++---------------------
1 files changed, 79 insertions(+), 74 deletions(-)
diff --git a/src/mesa/main/texstorage.c b/src/mesa/main/texstorage.c
index 10e5f8d..0a4cafe 100644
--- a/src/mesa/main/texstorage.c
+++ b/src/mesa/main/texstorage.c
@@ -118,39 +118,42 @@ next_mipmap_level_size(GLenum target,
}
-/**
- * Do actual memory allocation for glTexStorage1/2/3D().
- */
-static void
-setup_texstorage(struct gl_context *ctx,
- struct gl_texture_object *texObj,
- GLuint dims,
- gl_format texFormat,
- GLsizei levels, GLenum internalFormat,
- GLsizei width, GLsizei height, GLsizei depth)
+/** Helper to get a particular texture image in a texture object */
+static struct gl_texture_image *
+get_tex_image(struct gl_context *ctx,
+ struct gl_texture_object *texObj,
+ GLuint face, GLuint level)
+{
+ const GLenum faceTarget =
+ (texObj->Target == GL_TEXTURE_CUBE_MAP ||
+ texObj->Target == GL_PROXY_TEXTURE_CUBE_MAP)
+ ? GL_TEXTURE_CUBE_MAP_POSITIVE_X + face : texObj->Target;
+ return _mesa_get_tex_image(ctx, texObj, faceTarget, level);
+}
+
+
+
+static GLboolean
+initialize_texture_fields(struct gl_context *ctx,
+ struct gl_texture_object *texObj,
+ GLint levels,
+ GLsizei width, GLsizei height, GLsizei depth,
+ GLenum internalFormat, gl_format texFormat)
{
const GLenum target = texObj->Target;
const GLuint numFaces = _mesa_num_tex_faces(target);
GLint level, levelWidth = width, levelHeight = height, levelDepth = depth;
GLuint face;
- assert(levels > 0);
- assert(width > 0);
- assert(height > 0);
- assert(depth > 0);
-
/* Set up all the texture object's gl_texture_images */
for (level = 0; level < levels; level++) {
for (face = 0; face < numFaces; face++) {
- const GLenum faceTarget =
- (target == GL_TEXTURE_CUBE_MAP)
- ? GL_TEXTURE_CUBE_MAP_POSITIVE_X + face : target;
struct gl_texture_image *texImage =
- _mesa_get_tex_image(ctx, texObj, faceTarget, level);
+ get_tex_image(ctx, texObj, face, level);
if (!texImage) {
- _mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexImage%uD", dims);
- return;
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexStorage");
+ return GL_FALSE;
}
_mesa_init_teximage_fields(ctx, texImage,
@@ -160,49 +163,18 @@ setup_texstorage(struct gl_context *ctx,
next_mipmap_level_size(target, &levelWidth, &levelHeight, &levelDepth);
}
-
- assert(levelWidth > 0);
- assert(levelHeight > 0);
- assert(levelDepth > 0);
-
- if (!_mesa_is_proxy_texture(texObj->Target)) {
- /* Do actual texture memory allocation */
- if (!ctx->Driver.AllocTextureStorage(ctx, texObj, levels,
- width, height, depth)) {
- /* Reset the texture images' info to zeros.
- * Strictly speaking, we probably don't have to do this since
- * generating GL_OUT_OF_MEMORY can leave things in an undefined
- * state but this puts things in a consistent state.
- */
- for (level = 0; level < levels; level++) {
- for (face = 0; face < numFaces; face++) {
- struct gl_texture_image *texImage = texObj->Image[face][level];
- if (texImage) {
- _mesa_init_teximage_fields(ctx, texImage,
- 0, 0, 0, 0,
- GL_NONE, MESA_FORMAT_NONE);
- }
- }
- }
-
- _mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexStorage%uD", dims);
-
- return;
- }
-
- /* Only set this field for non-proxy texture objects */
- texObj->Immutable = GL_TRUE;
- }
+ return GL_TRUE;
}
/**
* Clear all fields of texture object to zeros. Used for proxy texture tests.
+ * Used for proxy texture tests (and to clean up when a texture memory
+ * allocation fails).
*/
static void
-clear_image_fields(struct gl_context *ctx,
- GLuint dims,
- struct gl_texture_object *texObj)
+clear_texture_fields(struct gl_context *ctx,
+ struct gl_texture_object *texObj)
{
const GLenum target = texObj->Target;
const GLuint numFaces = _mesa_num_tex_faces(target);
@@ -211,19 +183,17 @@ clear_image_fields(struct gl_context *ctx,
for (level = 0; level < Elements(texObj->Image[0]); level++) {
for (face = 0; face < numFaces; face++) {
- const GLenum faceTarget =
- (target == GL_TEXTURE_CUBE_MAP)
- ? GL_TEXTURE_CUBE_MAP_POSITIVE_X + face : target;
struct gl_texture_image *texImage =
- _mesa_get_tex_image(ctx, texObj, faceTarget, level);
+ get_tex_image(ctx, texObj, face, level);
if (!texImage) {
- _mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexStorage%uD", dims);
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexStorage");
return;
}
_mesa_init_teximage_fields(ctx, texImage,
- 0, 0, 0, 0, GL_NONE, MESA_FORMAT_NONE);
+ 0, 0, 0, 0, /* w, h, d, border */
+ GL_NONE, MESA_FORMAT_NONE);
}
}
}
@@ -356,7 +326,7 @@ texstorage(GLuint dims, GLenum target, GLsizei levels, GLenum internalformat,
GLsizei width, GLsizei height, GLsizei depth)
{
struct gl_texture_object *texObj;
- GLboolean sizeOK;
+ GLboolean sizeOK, dimensionsOK;
gl_format texFormat;
GET_CURRENT_CONTEXT(ctx);
@@ -373,24 +343,59 @@ texstorage(GLuint dims, GLenum target, GLsizei levels, GLenum internalformat,
internalformat, GL_NONE, GL_NONE);
assert(texFormat != MESA_FORMAT_NONE);
+ /* check that width, height, depth are legal for the mipmap level */
+ dimensionsOK = _mesa_legal_texture_dimensions(ctx, target, 0,
+ width, height, depth, 0);
+
sizeOK = ctx->Driver.TestProxyTexImage(ctx, target, 0, texFormat,
width, height, depth, 0);
- if (!sizeOK) {
- if (_mesa_is_proxy_texture(texObj->Target)) {
- /* clear all image fields for [levels] */
- clear_image_fields(ctx, dims, texObj);
+ if (_mesa_is_proxy_texture(texObj->Target)) {
+ if (dimensionsOK && sizeOK) {
+ initialize_texture_fields(ctx, texObj, levels, width, height, depth,
+ internalformat, texFormat);
}
else {
- _mesa_error(ctx, GL_INVALID_VALUE,
- "glTexStorage%uD(invalid width, height or depth)",
- dims);
- return;
+ /* clear all image fields for [levels] */
+ clear_texture_fields(ctx, texObj);
}
}
else {
- setup_texstorage(ctx, texObj, dims, texFormat, levels, internalformat,
- width, height, depth);
+ if (!dimensionsOK) {
+ _mesa_error(ctx, GL_INVALID_VALUE,
+ "glTexStorage%uD(invalid width, height or depth)", dims);
+ return;
+ }
+
+ if (!sizeOK) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY,
+ "glTexStorage%uD(texture too large)", dims);
+ }
+
+ assert(levels > 0);
+ assert(width > 0);
+ assert(height > 0);
+ assert(depth > 0);
+
+ if (!initialize_texture_fields(ctx, texObj, levels, width, height, depth,
+ internalformat, texFormat)) {
+ return;
+ }
+
+ /* Do actual texture memory allocation */
+ if (!ctx->Driver.AllocTextureStorage(ctx, texObj, levels,
+ width, height, depth)) {
+ /* Reset the texture images' info to zeros.
+ * Strictly speaking, we probably don't have to do this since
+ * generating GL_OUT_OF_MEMORY can leave things in an undefined
+ * state but this puts things in a consistent state.
+ */
+ clear_texture_fields(ctx, texObj);
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexStorage%uD", dims);
+ return;
+ }
+
+ texObj->Immutable = GL_TRUE;
}
}
--
1.7.4.1
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