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MaxwellToGL: Added a TODO and partial implementation of maxwell wrap mode 4 (Clamp, GL_CLAMP).

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This clamp mode was removed from OpenGL as of 3.1, we can emulate it by using GL_CLAMP_TO_BORDER to get the border color of the texture, and then manually sampling the edge to mix them in the fragment shader.
This commit is contained in:
Subv 2018-04-17 10:08:10 -05:00
parent 44e09ba807
commit 7fc516cc1a
1 changed files with 5 additions and 0 deletions
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src/video_core/renderer_opengl/maxwell_to_gl.h
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@ -74,6 +74,11 @@ inline GLenum WrapMode(Tegra::Texture::WrapMode wrap_mode) {
switch (wrap_mode) { switch (wrap_mode) {
case Tegra::Texture::WrapMode::ClampToEdge: case Tegra::Texture::WrapMode::ClampToEdge:
return GL_CLAMP_TO_EDGE; return GL_CLAMP_TO_EDGE;
case Tegra::Texture::WrapMode::ClampOGL:
// TODO(Subv): GL_CLAMP was removed as of OpenGL 3.1, to implement GL_CLAMP, we can use
// GL_CLAMP_TO_BORDER to get the border color of the texture, and then sample the edge to
// manually mix them. However the shader part of this is not yet implemented.
return GL_CLAMP_TO_BORDER;
} }
LOG_CRITICAL(Render_OpenGL, "Unimplemented texture wrap mode=%u", static_cast<u32>(wrap_mode)); LOG_CRITICAL(Render_OpenGL, "Unimplemented texture wrap mode=%u", static_cast<u32>(wrap_mode));
UNREACHABLE(); UNREACHABLE();