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Add workaround for reading back BGRA textures

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This commit is contained in:
Janos Pantos
2017-11-09 17:14:45 +01:00
committed by Baldur Karlsson
parent 997248380e
commit ce4aee7bdd
2 changed files with 21 additions and 1 deletions
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renderdoc/driver/gl/gl_common.h
+1
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@@ -441,6 +441,7 @@ extern bool IsGLES;
EXT_TO_CHECK(99, 32, OES_texture_storage_multisample_2d_array) \
EXT_TO_CHECK(99, 99, EXT_clip_cull_distance) \
EXT_TO_CHECK(99, 99, EXT_multisample_compatibility) \
EXT_TO_CHECK(99, 99, EXT_read_format_bgra) \
EXT_TO_CHECK(99, 99, NV_polygon_mode) \
EXT_TO_CHECK(99, 99, NV_read_depth) \
EXT_TO_CHECK(99, 99, NV_read_stencil) \
renderdoc/driver/gl/wrappers/gl_emulated.cpp
+20 -1
View File
@@ -1446,6 +1446,16 @@ void APIENTRY _glGetTexImage(GLenum target, GLint level, GLenum format, GLenum t
size_t sliceSize = GetByteSize(width, height, 1, format, type);
bool fixBGRA = false;
if(!HasExt[EXT_read_format_bgra] && format == eGL_BGRA)
{
if(type == eGL_UNSIGNED_BYTE)
fixBGRA = true;
else
RDCERR("Can't read back texture without EXT_read_format_bgra extension (data type: %s)",
ToStr(type).c_str());
}
for(GLint d = 0; d < depth; ++d)
{
switch(target)
@@ -1472,7 +1482,16 @@ void APIENTRY _glGetTexImage(GLenum target, GLint level, GLenum format, GLenum t
}
byte *dst = (byte *)pixels + d * sliceSize;
hookset->glReadPixels(0, 0, width, height, format, type, (void *)dst);
GLenum readFormat = fixBGRA ? eGL_RGBA : format;
hookset->glReadPixels(0, 0, width, height, readFormat, type, (void *)dst);
if(fixBGRA)
{
// since we read back the texture with RGBA format, we have to flip the R and B components
byte *b = dst;
for(GLint i = 0, n = width * height; i < n; ++i, b += 4)
std::swap(*b, *(b + 2));
}
}
hookset->glDeleteFramebuffers(1, &fbo);