egutierrez
042bb43b37
- cpp/functions/gfx: gl_shader, gl_framebuffer, fullscreen_quad, shader_canvas - cpp/apps/shaders_lab: main + 3 seed shaders (plasma, circle, checker) - ImGui docking layout: Code | Canvas | Controls Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
31 lines
737 B
C++
31 lines
737 B
C++
#define GL_GLEXT_PROTOTYPES
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#include <GL/gl.h>
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#include <GL/glext.h>
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#include "gfx/fullscreen_quad.h"
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namespace fn::gfx {
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void quad_init(Quad& q) {
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glGenVertexArrays(1, &q.vao);
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glGenBuffers(1, &q.vbo);
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// Vertex shader generates positions from gl_VertexID — VBO stays empty.
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glBindVertexArray(q.vao);
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glBindBuffer(GL_ARRAY_BUFFER, q.vbo);
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glBindBuffer(GL_ARRAY_BUFFER, 0);
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glBindVertexArray(0);
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}
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void quad_draw(const Quad& q) {
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glBindVertexArray(q.vao);
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glDrawArrays(GL_TRIANGLES, 0, 6);
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glBindVertexArray(0);
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}
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void quad_destroy(Quad& q) {
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if (q.vao) { glDeleteVertexArrays(1, &q.vao); q.vao = 0; }
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if (q.vbo) { glDeleteBuffers(1, &q.vbo); q.vbo = 0; }
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}
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} // namespace fn::gfx
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