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Surface cachin' again

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wheremyfoodat 2023-01-05 20:41:09 +02:00
parent 70dd8b2e9d
commit 3ce9dc1d7b
3 changed files with 36 additions and 35 deletions
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31
include/renderer_gl/surfaces.hpp
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@ -39,12 +39,39 @@ struct ColourBuffer {
}
void allocate() {
printf("Make this colour buffer allocate itself\n");
// Create texture for the FBO, setting up filters and the like
// Reading back the current texture is slow, but allocate calls should be and far between.
// If this becomes a bottleneck, we can fix it semi-easily
auto prevTexture = OpenGL::getTex2D();
texture.create(size.x(), size.y(), GL_RGBA8);
texture.bind();
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glBindTexture(GL_TEXTURE_2D, prevTexture);
//Helpers::panic("Creating FBO: %d, %d\n", size.x(), size.y());
fbo.createWithDrawTexture(texture);
fbo.bind(OpenGL::DrawAndReadFramebuffer);
if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
Helpers::panic("Incomplete framebuffer");
//glBindRenderbuffer(GL_RENDERBUFFER, 0);
// TODO: This should not clear the framebuffer contents. It should load them from VRAM.
GLint oldViewport[4];
glGetIntegerv(GL_VIEWPORT, oldViewport);
OpenGL::setViewport(size.x(), size.y());
OpenGL::setClearColor(0.0, 0.0, 0.0, 1.0);
OpenGL::clearColor();
OpenGL::setViewport(oldViewport[0], oldViewport[1], oldViewport[2], oldViewport[3]);
}
void free() {
valid = false;
printf("Make this colour buffer free itself\n");
if (texture.exists() || fbo.exists())
Helpers::panic("Make this buffer free itself");
}
bool matches(ColourBuffer& other) {