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GL: Allow ShaderTexClamp path on PowerVR if no projection is needed

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This commit is contained in:
Henrik Rydgard 2017-02-17 12:12:15 +01:00
parent e9d5eb694b
commit dcfc37a39d
1 changed files with 4 additions and 2 deletions
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6
GPU/GLES/FragmentShaderGeneratorGLES.cpp
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@ -288,8 +288,10 @@ bool GenerateFragmentShader(const ShaderID &id, char *buffer) {
if (doTexture) {
const char *texcoord = "v_texcoord";
// TODO: Not sure the right way to do this for projection.
// This path destroys resolution on older PowerVR no matter what I do, so we disable it on SGX 540 and lesser, and live with the consequences.
if (needShaderTexClamp && !(gl_extensions.bugs & BUG_PVR_SHADER_PRECISION_TERRIBLE)) {
// This path destroys resolution on older PowerVR no matter what I do if projection is needed,
// so we disable it on SGX 540 and lesser, and live with the consequences.
bool badPrecision = (gl_extensions.bugs & BUG_PVR_SHADER_PRECISION_TERRIBLE) != 0;
if (needShaderTexClamp && !(doTextureProjection && badPrecision)) {
// We may be clamping inside a larger surface (tex = 64x64, buffer=480x272).
// We may also be wrapping in such a surface, or either one in a too-small surface.
// Obviously, clamping to a smaller surface won't work. But better to clamp to something.