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LibGL: Better handling of texture targets and default textures

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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.
This commit is contained in:
Jelle Raaijmakers 2022-03-08 12:16:56 +01:00 • committed by Andreas Kling
parent c87d3521e4
commit c21a3b3029
7 changed files with 140 additions and 156 deletions
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2
Userland/Libraries/LibGL/GL/gl.h
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@ -339,6 +339,8 @@ extern "C" {
#define GL_TEXTURE_3D 0x806F
#define GL_PROXY_TEXTURE_3D 0x8070
#define GL_TEXTURE_CUBE_MAP 0x8513
#define GL_TEXTURE_1D_ARRAY 0x8C18
#define GL_TEXTURE_2D_ARRAY 0x8C1A
// Texture parameters
#define GL_TEXTURE_WIDTH 0x1000