[英]Multisampled framebuffer only visible with Nvidia cards, not AMD or Intel HD Graphics
该程序仅使用 Nvidia 显卡渲染帧缓冲区。 我用 AMD 和 Intel 测试过相同的版本,它显示为黑色。
我创建帧缓冲区:
enum FBOIDS
{
FBO,
FBO_MS,
TEXTURE,
TEXTURE_MS,
RBO,
RBO_MS
};
unsigned int ID[6];
glGenFramebuffers(1, &ID[FBO_MS]);
glBindFramebuffer(GL_FRAMEBUFFER, ID[FBO_MS]);
// generate texture
glGenTextures(1, &ID[TEXTURE_MS]);
glBindTexture(GL_TEXTURE_2D_MULTISAMPLE, ID[TEXTURE_MS]);
glTexImage2DMultisample(GL_TEXTURE_2D_MULTISAMPLE, smaa, GL_RGBA, 1, 1, GL_TRUE);
glBindTexture(GL_TEXTURE_2D_MULTISAMPLE, 0);
// attach it to currently bound framebuffer object
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D_MULTISAMPLE, ID[TEXTURE_MS], 0);
glGenRenderbuffers(1, &ID[RBO_MS]);
glBindRenderbuffer(GL_RENDERBUFFER, ID[RBO_MS]);
glRenderbufferStorageMultisample(GL_RENDERBUFFER, smaa, GL_DEPTH24_STENCIL8, 1, 1);
glBindRenderbuffer(GL_RENDERBUFFER, 0);
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_RENDERBUFFER, ID[RBO_MS]);
//========================================================================
glGenFramebuffers(1, &ID[FBO]);
glBindFramebuffer(GL_FRAMEBUFFER, ID[FBO]);
// generate texture
glGenTextures(1, &ID[TEXTURE]);
glBindTexture(GL_TEXTURE_2D, ID[TEXTURE]);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB8, 1, 1, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glBindTexture(GL_TEXTURE_2D, 0);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, ID[TEXTURE], 0);
glGenRenderbuffers(1, &ID[RBO]);
glBindRenderbuffer(GL_RENDERBUFFER, ID[RBO]);
glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, 1, 1);
glBindRenderbuffer(GL_RENDERBUFFER, 0);
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_RENDERBUFFER, ID[RBO]);
我是这样画的:
// =========================================
//=== Update tex
glBindFramebuffer(GL_FRAMEBUFFER, ID[FBO_MS]);
glBindTexture(GL_TEXTURE_2D_MULTISAMPLE, ID[TEXTURE_MS]);
glTexImage2DMultisample(GL_TEXTURE_2D_MULTISAMPLE, smaa, GL_RGB8, size.x, size.y, GL_TRUE);
glBindTexture(GL_TEXTURE_2D_MULTISAMPLE, 0);
// attach it to currently bound framebuffer object
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D_MULTISAMPLE, ID[TEXTURE_MS], 0);
glBindRenderbuffer(GL_RENDERBUFFER, ID[RBO_MS]);
glRenderbufferStorageMultisample(GL_RENDERBUFFER, smaa, GL_DEPTH24_STENCIL8, size.x, size.y);
glBindRenderbuffer(GL_RENDERBUFFER, 0);
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_RENDERBUFFER, ID[RBO_MS]);
//========================================================================
glBindFramebuffer(GL_FRAMEBUFFER, ID[FBO]);
// generate texture
glBindTexture(GL_TEXTURE_2D, ID[TEXTURE]);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB8, size.x, size.y, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
glBindTexture(GL_TEXTURE_2D, 0);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, ID[TEXTURE], 0);
glBindRenderbuffer(GL_RENDERBUFFER, ID[RBO]);
glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, size.x, size.y);
glBindRenderbuffer(GL_RENDERBUFFER, 0);
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_RENDERBUFFER, ID[RBO]);
glBindFramebuffer(GL_FRAMEBUFFER, ID[FBO_MS]);
glBindFramebuffer(GL_READ_FRAMEBUFFER, ID[FBO_MS]);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, ID[FBO]);
glBlitFramebuffer(0, 0, size.x, size.y, 0, 0, size.x, size.y, GL_COLOR_BUFFER_BIT, GL_NEAREST);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
带有图像的 Github 问题的链接: https://github.com/christt105/Elit3D/issues/40
问题已解决。 问题是我设置了更多 GPU 可以承受的样本。 我用过glGetIntegerv(GL_MAX_SAMPLES, &maxSamples);
获得最大样本数。
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