[Mesa-dev] [PATCH 2/6] mesa: consolidate subtexture xoffset/yoffset/width/height error checking code
Brian Paul
brian.e.paul at gmail.com
Sat Sep 22 08:35:03 PDT 2012
From: Brian Paul <brianp at vmware.com>
This is the code that checks if a subtexture region is aligned to the
compressed format's block size.
---
src/mesa/main/teximage.c | 161 +++++++++++++++++++++-------------------------
1 files changed, 73 insertions(+), 88 deletions(-)
diff --git a/src/mesa/main/teximage.c b/src/mesa/main/teximage.c
index 37218f5..3197434 100644
--- a/src/mesa/main/teximage.c
+++ b/src/mesa/main/teximage.c
@@ -1343,6 +1343,60 @@ _mesa_legal_texture_dimensions(struct gl_context *ctx, GLenum target,
/**
+ * Do error checking of xoffset, yoffset, width, height for glTexSubImage,
+ * glCopyTexSubImage and glCompressedTexSubImage.
+ * Basically, check that the subregion is aligned to the compressed format's
+ * block size. See comments in function for more info.
+ * \return GL_TRUE if error found, GL_FALSE otherwise.
+ */
+static GLboolean
+error_check_subtexture_dimensions(struct gl_context *ctx,
+ const char *function,
+ GLuint dims,
+ gl_format texFormat,
+ GLint xoffset, GLint yoffset,
+ GLsizei subWidth, GLsizei subHeight,
+ GLsizei texWidth, GLsizei texHeight)
+{
+ GLuint bw, bh;
+
+ /*
+ * The OpenGL spec (and GL_ARB_texture_compression) says only whole
+ * compressed texture images can be updated. But, that restriction may be
+ * relaxed for particular compressed formats. At this time, all the
+ * compressed formats supported by Mesa allow sub-textures to be updated
+ * along compressed block boundaries.
+ */
+ _mesa_get_format_block_size(texFormat, &bw, &bh);
+
+ /* offset must be multiple of block size */
+ if ((xoffset % bw != 0) || (yoffset % bh != 0)) {
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "%s%dD(xoffset = %d, yoffset = %d)",
+ function, dims, xoffset, yoffset);
+ return GL_TRUE;
+ }
+
+ /* size must be multiple of bw by bh or equal to whole texture size */
+ if ((subWidth % bw != 0) && subWidth != texWidth) {
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "%s%dD(width = %d)", function, dims, subWidth);
+ return GL_TRUE;
+ }
+
+ if ((subHeight % bh != 0) && subHeight != texHeight) {
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "%s%dD(height = %d)", function, dims, subHeight);
+ return GL_TRUE;
+ }
+
+ return GL_FALSE;
+}
+
+
+
+
+/**
* This is the fallback for Driver.TestProxyTexImage() for doing device-
* specific texture image size checks.
*
@@ -1649,17 +1703,6 @@ compressed_tex_size(GLsizei width, GLsizei height, GLsizei depth,
}
-/*
- * Return compressed texture block size, in pixels.
- */
-static void
-get_compressed_block_size(GLenum glformat, GLuint *bw, GLuint *bh)
-{
- gl_format mesaFormat = _mesa_glenum_to_compressed_format(glformat);
- _mesa_get_format_block_size(mesaFormat, bw, bh);
-}
-
-
/**
* Test the glTexImage[123]D() parameters for errors.
*
@@ -2195,35 +2238,19 @@ subtexture_error_check2( struct gl_context *ctx, GLuint dimensions,
}
if (_mesa_is_format_compressed(destTex->TexFormat)) {
- GLuint bw, bh;
-
if (compressedteximage_only_format(ctx, destTex->InternalFormat)) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glTexSubImage%dD(no compression for format)", dimensions);
return GL_TRUE;
}
- /* do tests which depend on compression block size */
- _mesa_get_format_block_size(destTex->TexFormat, &bw, &bh);
-
- /* offset must be multiple of block size */
- if ((xoffset % bw != 0) || (yoffset % bh != 0)) {
- _mesa_error(ctx, GL_INVALID_OPERATION,
- "glTexSubImage%dD(xoffset = %d, yoffset = %d)",
- dimensions, xoffset, yoffset);
+ if (error_check_subtexture_dimensions(ctx, "glTexSubImage", dimensions,
+ destTex->TexFormat,
+ xoffset, yoffset,
+ width, height,
+ destTex->Width, destTex->Height)) {
return GL_TRUE;
}
- /* size must be multiple of bw by bh or equal to whole texture size */
- if ((width % bw != 0) && (GLuint) width != destTex->Width) {
- _mesa_error(ctx, GL_INVALID_OPERATION,
- "glTexSubImage%dD(width = %d)", dimensions, width);
- return GL_TRUE;
- }
- if ((height % bh != 0) && (GLuint) height != destTex->Height) {
- _mesa_error(ctx, GL_INVALID_OPERATION,
- "glTexSubImage%dD(height = %d)", dimensions, height);
- return GL_TRUE;
- }
}
if (ctx->Version >= 30 || ctx->Extensions.EXT_texture_integer) {
@@ -2508,23 +2535,14 @@ copytexsubimage_error_check(struct gl_context *ctx, GLuint dimensions,
"glCopyTexSubImage%dD(no compression for format)", dimensions);
return GL_TRUE;
}
- /* offset must be multiple of 4 */
- if ((xoffset & 3) || (yoffset & 3)) {
- _mesa_error(ctx, GL_INVALID_VALUE,
- "glCopyTexSubImage%dD(xoffset or yoffset)", dimensions);
+
+ if (error_check_subtexture_dimensions(ctx, "glCopyTexSubImage",
+ dimensions, texImage->TexFormat,
+ xoffset, yoffset, width, height,
+ texImage->Width,
+ texImage->Height)) {
return GL_TRUE;
}
- /* size must be multiple of 4 */
- if ((width & 3) != 0 && (GLuint) width != texImage->Width) {
- _mesa_error(ctx, GL_INVALID_VALUE,
- "glCopyTexSubImage%dD(width)", dimensions);
- return GL_TRUE;
- }
- if ((height & 3) != 0 && (GLuint) height != texImage->Height) {
- _mesa_error(ctx, GL_INVALID_VALUE,
- "glCopyTexSubImage%dD(height)", dimensions);
- return GL_TRUE;
- }
}
if (texImage->InternalFormat == GL_YCBCR_MESA) {
@@ -3494,7 +3512,7 @@ compressed_subtexture_error_check(struct gl_context *ctx, GLint dimensions,
GLenum format, GLsizei imageSize)
{
GLint expectedSize, maxLevels = 0, maxTextureSize;
- GLuint bw, bh;
+
(void) zoffset;
if (dimensions == 1) {
@@ -3543,20 +3561,6 @@ compressed_subtexture_error_check(struct gl_context *ctx, GLint dimensions,
if (level < 0 || level >= maxLevels)
return GL_INVALID_VALUE;
- /*
- * do checks which depend on compression block size
- */
- get_compressed_block_size(format, &bw, &bh);
-
- if ((xoffset % bw != 0) || (yoffset % bh != 0))
- return GL_INVALID_OPERATION;
-
- if ((width % bw != 0) && width != 2 && width != 1)
- return GL_INVALID_OPERATION;
-
- if ((height % bh != 0) && height != 2 && height != 1)
- return GL_INVALID_OPERATION;
-
expectedSize = compressed_tex_size(width, height, depth, format);
if (expectedSize != imageSize)
return GL_INVALID_VALUE;
@@ -3571,6 +3575,7 @@ compressed_subtexture_error_check(struct gl_context *ctx, GLint dimensions,
*/
static GLboolean
compressed_subtexture_error_check2(struct gl_context *ctx, GLuint dims,
+ GLint xoffset, GLint yoffset,
GLsizei width, GLsizei height,
GLsizei depth, GLenum format,
struct gl_texture_image *texImage)
@@ -3589,34 +3594,13 @@ compressed_subtexture_error_check2(struct gl_context *ctx, GLuint dims,
return GL_TRUE;
}
- if (((width == 1 || width == 2) &&
- width != (GLsizei) texImage->Width) ||
- (width > (GLsizei) texImage->Width)) {
- _mesa_error(ctx, GL_INVALID_VALUE,
- "glCompressedTexSubImage%uD(width=%d)", dims, width);
+ if (error_check_subtexture_dimensions(ctx, "glCompressedTexSubImage", dims,
+ texImage->TexFormat,
+ xoffset, yoffset, width, height,
+ texImage->Width, texImage->Height)) {
return GL_TRUE;
}
- if (dims >= 2) {
- if (((height == 1 || height == 2) &&
- height != (GLsizei) texImage->Height) ||
- (height > (GLsizei) texImage->Height)) {
- _mesa_error(ctx, GL_INVALID_VALUE,
- "glCompressedTexSubImage%uD(height=%d)", dims, height);
- return GL_TRUE;
- }
- }
-
- if (dims >= 3) {
- if (((depth == 1 || depth == 2) &&
- depth != (GLsizei) texImage->Depth) ||
- (depth > (GLsizei) texImage->Depth)) {
- _mesa_error(ctx, GL_INVALID_VALUE,
- "glCompressedTexSubImage%uD(depth=%d)", dims, depth);
- return GL_TRUE;
- }
- }
-
return GL_FALSE;
}
@@ -3688,7 +3672,8 @@ compressed_tex_sub_image(GLuint dims, GLenum target, GLint level,
texImage = _mesa_select_tex_image(ctx, texObj, target, level);
assert(texImage);
- if (compressed_subtexture_error_check2(ctx, dims, width, height, depth,
+ if (compressed_subtexture_error_check2(ctx, dims, xoffset, yoffset,
+ width, height, depth,
format, texImage)) {
/* error was recorded */
}
--
1.7.4.1
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