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clean the usage of glCopyImageSubData and provide a fall back for 4.2)

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This commit is contained in:
samcake 2017-02-08 11:36:34 -08:00
parent 8a40e951ac
commit 9e95944195
1 changed files with 10 additions and 28 deletions
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38
libraries/gpu-gl/src/gpu/gl45/GL45BackendTexture.cpp
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@ -439,35 +439,17 @@ void GL45Texture::stripToMip(uint16_t newMinMip) {
{
PROFILE_RANGE(render_gpu_gl, "Blit");
// Preferred path only available in 4.3
if (GLEW_VERSION_4_3) {
for (uint16 targetMip = _minMip; targetMip <= _maxMip; ++targetMip) {
uint16 sourceMip = targetMip + mipDelta;
Vec3u mipDimensions = _gpuObject.evalMipDimensions(targetMip + _mipOffset);
for (GLenum target : getFaceTargets(_target)) {
glCopyImageSubData(
oldId, target, sourceMip, 0, 0, 0,
_id, target, targetMip, 0, 0, 0,
mipDimensions.x, mipDimensions.y, 1
);
(void)CHECK_GL_ERROR();
}
for (uint16 targetMip = _minMip; targetMip <= _maxMip; ++targetMip) {
uint16 sourceMip = targetMip + mipDelta;
Vec3u mipDimensions = _gpuObject.evalMipDimensions(targetMip + _mipOffset);
for (GLenum target : getFaceTargets(_target)) {
glCopyImageSubData(
oldId, target, sourceMip, 0, 0, 0,
_id, target, targetMip, 0, 0, 0,
mipDimensions.x, mipDimensions.y, 1
);
(void)CHECK_GL_ERROR();
}
} else {
GLuint fbo { 0 };
glCreateFramebuffers(1, &fbo);
glBindFramebuffer(GL_READ_FRAMEBUFFER, fbo);
for (uint16 targetMip = _minMip; targetMip <= _maxMip; ++targetMip) {
uint16 sourceMip = targetMip + mipDelta;
Vec3u mipDimensions = _gpuObject.evalMipDimensions(targetMip + _mipOffset);
for (GLenum target : getFaceTargets(_target)) {
glFramebufferTexture2D(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, target, oldId, sourceMip);
(void)CHECK_GL_ERROR();
glCopyTextureSubImage2D(_id, targetMip, 0, 0, 0, 0, mipDimensions.x, mipDimensions.y);
(void)CHECK_GL_ERROR();
}
}
glBindFramebuffer(GL_READ_FRAMEBUFFER, 0);
glDeleteFramebuffers(1, &fbo);
}
glDeleteTextures(1, &oldId);