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#include "log.h"
#include "sway/desktop/fx_renderer/fx_framebuffer.h"
void fx_framebuffer_bind(struct fx_framebuffer *buffer, GLsizei width, GLsizei height) {
glBindFramebuffer(GL_FRAMEBUFFER, buffer->fb);
glViewport(0, 0, width, height);
}
void fx_framebuffer_create(struct wlr_output *output, struct fx_framebuffer *buffer, bool bind) {
bool firstAlloc = false;
// Create a new framebuffer
if (buffer->fb == (uint32_t) -1) {
glGenFramebuffers(1, &buffer->fb);
firstAlloc = true;
}
if (buffer->texture.id == 0) {
firstAlloc = true;
glGenTextures(1, &buffer->texture.id);
glBindTexture(GL_TEXTURE_2D, buffer->texture.id);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
}
int width, height;
wlr_output_transformed_resolution(output, &width, &height);
if (firstAlloc || buffer->texture.width != width || buffer->texture.height != height) {
glBindTexture(GL_TEXTURE_2D, buffer->texture.id);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, 0);
glBindFramebuffer(GL_FRAMEBUFFER, buffer->fb);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,
buffer->texture.id, 0);
buffer->texture.target = GL_TEXTURE_2D;
buffer->texture.has_alpha = false;
buffer->texture.width = width;
buffer->texture.height = height;
GLenum status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
if (status != GL_FRAMEBUFFER_COMPLETE) {
sway_log(SWAY_ERROR, "Framebuffer incomplete, couldn't create! (FB status: %i)", status);
return;
}
sway_log(SWAY_DEBUG, "Framebuffer created, status %i", status);
}
// Bind the default framebuffer
glBindTexture(GL_TEXTURE_2D, 0);
if (bind) {
fx_framebuffer_bind(buffer, width, height);
}
}
void fx_framebuffer_release(struct fx_framebuffer *buffer) {
if (buffer->fb != (uint32_t) -1 && buffer->fb) {
glDeleteFramebuffers(1, &buffer->fb);
}
buffer->fb= -1;
if (buffer->texture.id) {
glDeleteTextures(1, &buffer->texture.id);
}
buffer->texture.id = 0;
buffer->texture.width = -1;
buffer->texture.height = -1;
}
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