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LibGL: Better handling of texture targets and default textures
We were lacking support for default textures (i.e. calling `glBindTexture` with a `texture` argument of `0`) which caused our Quake2 port to render red screens whenever a video was playing. Every texture unit is now initialized with a default 2D texture. Additionally, we had this concept of a "currently bound target" on our texture units which is not how OpenGL wants us to handle targets. Calling `glBindTexture` should set the texture for the provided target only, making it sort of an alias for future operations on the same target. Finally, `glDeleteTextures` should not remove the bound texture from the target in the texture unit, but it should reset it to the default texture.
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7 changed files with 140 additions and 156 deletions
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@ -339,6 +339,8 @@ extern "C" {
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#define GL_TEXTURE_3D 0x806F
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#define GL_PROXY_TEXTURE_3D 0x8070
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#define GL_TEXTURE_CUBE_MAP 0x8513
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#define GL_TEXTURE_1D_ARRAY 0x8C18
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#define GL_TEXTURE_2D_ARRAY 0x8C1A
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// Texture parameters
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#define GL_TEXTURE_WIDTH 0x1000
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