Fix reading of depth textures/buffers in ODR. #2652
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A 32bit depth and 8bit stencil buffer has format GL_DEPTH32F_STENCIL8.
GLES does not actually have `GL_DEPTH_COMPONENT32`. Instead, `GL_DEPTH_COMPONENT` with `GL_UNSIGNED_INT` is actually a `GL_DEPTH_COMPONENT24` format.
Adds the internal format, as specified by the application, to the `Image` struct. This field is only maintained for texture images and represents the internal format as specified by the application and may thus be unsized (GLES2) or sized (GLES3). This is primarily required for reading the data back from the GPU, as there are limitations when using GLES2 type texture specification.
Depth textures, and framebuffers backed by depth textures, that where created with an unsized internal format require special handling when read back from the GPU. For example, when blitting a FB, the source and target formats will have to match and thus have to both be created with a sized or unsized internal format. Fixes google#2584
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Note that the field added in 60bef28 is only used in one place in this PR, but will need to be used in other places as well. For example, my test app for this doesn't replay correctly in MEC, due to the fact that you can use |
AWoloszyn
approved these changes
Mar 7, 2019
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Depth textures, and framebuffers backed by depth textures, that where created with an unsized internal format require special handling when read back from the GPU. For example, when blitting a FB, the source and target formats will have to match and thus have to both be created with a sized or unsized internal format.
Fixes #2584