48 lines
1.4 KiB
C++
48 lines
1.4 KiB
C++
#include "preview.h"
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/* Initializes the preview */
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void
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preview_init(Preview* self)
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{
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glGenFramebuffers(1, &self->fbo);
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glBindFramebuffer(GL_FRAMEBUFFER, self->fbo);
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glGenTextures(1, &self->texture);
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glBindTexture(GL_TEXTURE_2D, self->texture);
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glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, PREVIEW_SIZE.x, PREVIEW_SIZE.y, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, self->texture, 0);
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glGenRenderbuffers(1, &self->rbo);
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glBindRenderbuffer(GL_RENDERBUFFER, self->rbo);
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glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, PREVIEW_SIZE.x, PREVIEW_SIZE.y);
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glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_RENDERBUFFER, self->rbo);
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glBindFramebuffer(GL_FRAMEBUFFER, 0);
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}
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void
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preview_draw(Preview* self)
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{
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glBindFramebuffer(GL_FRAMEBUFFER, self->fbo);
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glViewport(0, 0, PREVIEW_SIZE.x, PREVIEW_SIZE.y);
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glClearColor(self->color.r, self->color.g, self->color.b, self->color.a);
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glClear(GL_COLOR_BUFFER_BIT);
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glBindFramebuffer(GL_FRAMEBUFFER, 0); // unbind
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}
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void
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preview_free(Preview* self)
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{
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glDeleteTextures(1, &self->texture);
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glDeleteFramebuffers(1, &self->fbo);
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glDeleteRenderbuffers(1, &self->rbo);
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memset(self, '\0', sizeof(Preview));
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} |