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LibGL+LibSoftGPU: Add support for 8-bit luminance (+ alpha) textures

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Used by Half-Life for single colour textures. The alpha variant is
especially used for UI textures.
This commit is contained in:
Luke Wilde 2022-01-15 10:11:27 +00:00 • committed by Andreas Kling
parent 6e37487477
commit c6a0365c58
3 changed files with 43 additions and 1 deletions
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10
Userland/Libraries/LibGL/SoftwareGLContext.cpp
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@ -915,7 +915,7 @@ void SoftwareGLContext::gl_tex_image_2d(GLenum target, GLint level, GLint intern
internal_format = GL_RGBA;
// We only support symbolic constants for now
RETURN_WITH_ERROR_IF(!(internal_format == GL_RGB || internal_format == GL_RGBA), GL_INVALID_ENUM);
RETURN_WITH_ERROR_IF(!(internal_format == GL_RGB || internal_format == GL_RGBA || internal_format == GL_LUMINANCE8 || internal_format == GL_LUMINANCE8_ALPHA8), GL_INVALID_ENUM);
RETURN_WITH_ERROR_IF(!(type == GL_UNSIGNED_BYTE || type == GL_UNSIGNED_SHORT_5_6_5), GL_INVALID_VALUE);
RETURN_WITH_ERROR_IF(level < 0 || level > Texture2D::LOG2_MAX_TEXTURE_SIZE, GL_INVALID_VALUE);
RETURN_WITH_ERROR_IF(width < 0 || height < 0 || width > (2 + Texture2D::MAX_TEXTURE_SIZE) || height > (2 + Texture2D::MAX_TEXTURE_SIZE), GL_INVALID_VALUE);
@ -941,6 +941,14 @@ void SoftwareGLContext::gl_tex_image_2d(GLenum target, GLint level, GLint intern
device_format = SoftGPU::ImageFormat::RGBA8888;
break;
case GL_LUMINANCE8:
device_format = SoftGPU::ImageFormat::L8;
break;
case GL_LUMINANCE8_ALPHA8:
device_format = SoftGPU::ImageFormat::L8A8;
break;
default:
VERIFY_NOT_REACHED();
}