const gl_format texFormat =
_mesa_get_srgb_format_linear(texImage->TexFormat);
const GLenum baseFormat = _mesa_get_format_base_format(texFormat);
+ const GLenum destBaseFormat = _mesa_base_tex_format(ctx, format);
+ GLenum rebaseFormat = GL_NONE;
const GLuint width = texImage->Width;
const GLuint height = texImage->Height;
const GLuint depth = texImage->Depth;
}
if (baseFormat == GL_LUMINANCE ||
+ baseFormat == GL_INTENSITY ||
baseFormat == GL_LUMINANCE_ALPHA) {
+ /* If a luminance (or intensity) texture is read back as RGB(A), the
+ * returned value should be (L,0,0,1), not (L,L,L,1). Set rebaseFormat
+ * here to get G=B=0.
+ */
+ rebaseFormat = texImage->_BaseFormat;
+ }
+ else if ((baseFormat == GL_RGBA ||
+ baseFormat == GL_RGB ||
+ baseFormat == GL_RG) &&
+ (destBaseFormat == GL_LUMINANCE ||
+ destBaseFormat == GL_LUMINANCE_ALPHA ||
+ destBaseFormat == GL_LUMINANCE_INTEGER_EXT ||
+ destBaseFormat == GL_LUMINANCE_ALPHA_INTEGER_EXT)) {
+ /* If we're reading back an RGB(A) texture as luminance then we need
+ * to return L=tex(R). Note, that's different from glReadPixels which
+ * returns L=R+G+B.
+ */
+ rebaseFormat = GL_LUMINANCE_ALPHA; /* this covers GL_LUMINANCE too */
+ }
+
+ if (rebaseFormat) {
_mesa_rebase_rgba_float(width * height, (GLfloat (*)[4]) tempImage,
- baseFormat);
+ rebaseFormat);
}
srcRow = tempImage;
}
+/**
+ * Return a base GL format given the user-requested format
+ * for glGetTexImage().
+ */
+static GLenum
+_mesa_base_pack_format(GLenum format)
+{
+ switch (format) {
+ case GL_ABGR_EXT:
+ case GL_BGRA:
+ case GL_BGRA_INTEGER:
+ case GL_RGBA_INTEGER:
+ return GL_RGBA;
+ case GL_BGR:
+ case GL_BGR_INTEGER:
+ case GL_RGB_INTEGER:
+ return GL_RGB;
+ case GL_RED_INTEGER:
+ return GL_RED;
+ case GL_GREEN_INTEGER:
+ return GL_GREEN;
+ case GL_BLUE_INTEGER:
+ return GL_BLUE;
+ case GL_ALPHA_INTEGER:
+ return GL_ALPHA;
+ case GL_LUMINANCE_INTEGER_EXT:
+ return GL_LUMINANCE;
+ case GL_LUMINANCE_ALPHA_INTEGER_EXT:
+ return GL_LUMINANCE_ALPHA;
+ default:
+ return format;
+ }
+}
+
+
/**
* Get an uncompressed color texture image.
*/
const gl_format texFormat =
_mesa_get_srgb_format_linear(texImage->TexFormat);
const GLuint width = texImage->Width;
- const GLenum destBaseFormat = _mesa_base_tex_format(ctx, format);
+ GLenum destBaseFormat = _mesa_base_pack_format(format);
GLenum rebaseFormat = GL_NONE;
GLuint height = texImage->Height;
GLuint depth = texImage->Depth;
GLuint (*rgba_uint)[4];
GLboolean tex_is_integer = _mesa_is_format_integer_color(texImage->TexFormat);
GLboolean tex_is_uint = _mesa_is_format_unsigned(texImage->TexFormat);
+ GLenum texBaseFormat = _mesa_get_format_base_format(texImage->TexFormat);
/* Allocate buffer for one row of texels */
rgba = malloc(4 * width * sizeof(GLfloat));
rebaseFormat = texImage->_BaseFormat;
}
else if ((texImage->_BaseFormat == GL_RGBA ||
- texImage->_BaseFormat == GL_RGB) &&
+ texImage->_BaseFormat == GL_RGB ||
+ texImage->_BaseFormat == GL_RG) &&
(destBaseFormat == GL_LUMINANCE ||
destBaseFormat == GL_LUMINANCE_ALPHA ||
destBaseFormat == GL_LUMINANCE_INTEGER_EXT ||
*/
rebaseFormat = GL_LUMINANCE_ALPHA; /* this covers GL_LUMINANCE too */
}
+ else if (texImage->_BaseFormat != texBaseFormat) {
+ /* The internal format and the real format differ, so we can't rely
+ * on the unpack functions setting the correct constant values.
+ * (e.g. reading back GL_RGB8 which is actually RGBA won't set alpha=1)
+ */
+ switch (texImage->_BaseFormat) {
+ case GL_RED:
+ if ((texBaseFormat == GL_RGBA ||
+ texBaseFormat == GL_RGB ||
+ texBaseFormat == GL_RG) &&
+ (destBaseFormat == GL_RGBA ||
+ destBaseFormat == GL_RGB ||
+ destBaseFormat == GL_RG ||
+ destBaseFormat == GL_GREEN)) {
+ rebaseFormat = texImage->_BaseFormat;
+ break;
+ }
+ /* fall through */
+ case GL_RG:
+ if ((texBaseFormat == GL_RGBA ||
+ texBaseFormat == GL_RGB) &&
+ (destBaseFormat == GL_RGBA ||
+ destBaseFormat == GL_RGB ||
+ destBaseFormat == GL_BLUE)) {
+ rebaseFormat = texImage->_BaseFormat;
+ break;
+ }
+ /* fall through */
+ case GL_RGB:
+ if (texBaseFormat == GL_RGBA &&
+ (destBaseFormat == GL_RGBA ||
+ destBaseFormat == GL_ALPHA ||
+ destBaseFormat == GL_LUMINANCE_ALPHA)) {
+ rebaseFormat = texImage->_BaseFormat;
+ }
+ break;
+
+ case GL_ALPHA:
+ if (destBaseFormat != GL_ALPHA) {
+ rebaseFormat = texImage->_BaseFormat;
+ }
+ break;
+ }
+ }
for (img = 0; img < depth; img++) {
GLubyte *srcMap;
transferOps |= IMAGE_CLAMP_BIT;
}
}
- /* This applies to RGB, RGBA textures. if the format is either LUMINANCE
- * or LUMINANCE ALPHA, luminance (L) is computed as L=R+G+B .we need to
- * clamp the sum to [0,1].
- */
- else if ((format == GL_LUMINANCE ||
- format == GL_LUMINANCE_ALPHA) &&
- dataType == GL_UNSIGNED_NORMALIZED) {
- transferOps |= IMAGE_CLAMP_BIT;
- }
if (_mesa_is_format_compressed(texImage->TexFormat)) {
get_tex_rgba_compressed(ctx, dimensions, format, type,
{
const GLenum target = texImage->TexObject->Target;
GLboolean memCopy = GL_FALSE;
+ GLenum texBaseFormat = _mesa_get_format_base_format(texImage->TexFormat);
/*
* Check if we can use memcpy to copy from the hardware texture
* format to the user's format/type.
* Note that GL's pixel transfer ops don't apply to glGetTexImage()
*/
- if (target == GL_TEXTURE_1D ||
- target == GL_TEXTURE_2D ||
- target == GL_TEXTURE_RECTANGLE ||
- _mesa_is_cube_face(target)) {
+ if ((target == GL_TEXTURE_1D ||
+ target == GL_TEXTURE_2D ||
+ target == GL_TEXTURE_RECTANGLE ||
+ _mesa_is_cube_face(target)) &&
+ texBaseFormat == texImage->_BaseFormat) {
memCopy = _mesa_format_matches_format_and_type(texImage->TexFormat,
format, type,
ctx->Pack.SwapBytes);
case GL_TEXTURE_2D_ARRAY_EXT:
return (ctx->Extensions.MESA_texture_array ||
ctx->Extensions.EXT_texture_array);
+ case GL_TEXTURE_CUBE_MAP_ARRAY:
+ return ctx->Extensions.ARB_texture_cube_map_array;
default:
return GL_FALSE;
}
struct gl_texture_object *texObj;
struct gl_texture_image *texImage;
GET_CURRENT_CONTEXT(ctx);
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
+
+ FLUSH_VERTICES(ctx, 0);
if (getteximage_error_check(ctx, target, level, format, type,
bufSize, pixels)) {
struct gl_texture_object *texObj;
struct gl_texture_image *texImage;
GET_CURRENT_CONTEXT(ctx);
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
+
+ FLUSH_VERTICES(ctx, 0);
if (getcompressedteximage_error_check(ctx, target, level, bufSize, img)) {
return;
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