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https://github.com/open-goal/jak-project
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water111
ef0f7635d3
* first pass at ocean mid * fix some bugs * fix seams * cleanup * temp * fix mipmap
95 lines
3.6 KiB
C++
95 lines
3.6 KiB
C++
#include "opengl_utils.h"
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#include "common/util/Assert.h"
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#include <cstdio>
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FramebufferTexturePair::FramebufferTexturePair(int w, int h, u64 texture_format, int num_levels)
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: m_w(w), m_h(h) {
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m_framebuffers.resize(num_levels);
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glGenFramebuffers(num_levels, m_framebuffers.data());
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glGenTextures(1, &m_texture);
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GLint old_framebuffer;
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glGetIntegerv(GL_FRAMEBUFFER_BINDING, &old_framebuffer);
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for (int i = 0; i < num_levels; i++) {
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glBindTexture(GL_TEXTURE_2D, m_texture);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, num_levels);
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glTexImage2D(GL_TEXTURE_2D, i, GL_RGBA, w >> i, h >> i, 0, GL_RGBA, texture_format, nullptr);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
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}
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for (int i = 0; i < num_levels; i++) {
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glBindTexture(GL_TEXTURE_2D, 0);
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glBindFramebuffer(GL_FRAMEBUFFER, m_framebuffers[i]);
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glBindTexture(GL_TEXTURE_2D, m_texture);
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// I don't know if we really need to do this. whatever uses this texture should figure it out.
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glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0 + i, m_texture, i);
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GLenum draw_buffers[1] = {GLenum(GL_COLOR_ATTACHMENT0 + i)};
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glDrawBuffers(1, draw_buffers);
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auto status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
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if (status != GL_FRAMEBUFFER_COMPLETE) {
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switch (status) {
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case GL_FRAMEBUFFER_UNDEFINED:
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printf("GL_FRAMEBUFFER_UNDEFINED\n");
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break;
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case GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT:
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printf("GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT\n");
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break;
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case GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT:
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printf("GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT\n");
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break;
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case GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER:
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printf("GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER\n");
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break;
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case GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER:
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printf("GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER\n");
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break;
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case GL_FRAMEBUFFER_UNSUPPORTED:
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printf("GL_FRAMEBUFFER_UNSUPPORTED\n");
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break;
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case GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE:
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printf("GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE\n");
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break;
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case GL_FRAMEBUFFER_INCOMPLETE_LAYER_TARGETS:
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printf("GL_FRAMEBUFFER_INCOMPLETE_LAYER_TARGETS\n");
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break;
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}
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ASSERT(false);
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}
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glBindFramebuffer(GL_FRAMEBUFFER, old_framebuffer);
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}
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glBindFramebuffer(GL_FRAMEBUFFER, old_framebuffer);
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}
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FramebufferTexturePair::~FramebufferTexturePair() {
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glDeleteFramebuffers(m_framebuffers.size(), m_framebuffers.data());
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glDeleteTextures(1, &m_texture);
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}
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FramebufferTexturePairContext::FramebufferTexturePairContext(FramebufferTexturePair& fb, int level)
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: m_fb(&fb) {
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glGetIntegerv(GL_VIEWPORT, m_old_viewport);
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glGetIntegerv(GL_FRAMEBUFFER_BINDING, &m_old_framebuffer);
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glBindFramebuffer(GL_FRAMEBUFFER, m_fb->m_framebuffers[level]);
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glViewport(0, 0, m_fb->m_w, m_fb->m_h);
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glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, m_fb->m_texture, level);
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}
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void FramebufferTexturePairContext::switch_to(FramebufferTexturePair& fb) {
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if (&fb != m_fb) {
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m_fb = &fb;
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glBindFramebuffer(GL_FRAMEBUFFER, m_fb->m_framebuffers[0]);
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glViewport(0, 0, m_fb->m_w, m_fb->m_h);
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glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, m_fb->m_texture, 0);
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}
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}
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FramebufferTexturePairContext::~FramebufferTexturePairContext() {
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glViewport(m_old_viewport[0], m_old_viewport[1], m_old_viewport[2], m_old_viewport[3]);
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glBindFramebuffer(GL_FRAMEBUFFER, m_old_framebuffer);
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} |