mirror of
https://github.com/hyprwm/wlroots-hyprland.git
synced 2024-11-02 11:55:59 +01:00
f252c5a792
Since GLES2 doesn't do this for us, it seems, on all platforms.
183 lines
5 KiB
C
183 lines
5 KiB
C
#include <stdint.h>
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#include <stdlib.h>
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#include <assert.h>
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#include <GLES2/gl2.h>
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#include <wayland-util.h>
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#include <wayland-server-protocol.h>
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#include <wlr/render.h>
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#include <wlr/render/interface.h>
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#include <wlr/render/matrix.h>
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#include <wlr/util/log.h>
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#include "render/gles2.h"
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static struct {
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bool initialized;
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GLuint rgb, rgba;
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GLuint quad;
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GLuint ellipse;
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} shaders;
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static bool compile_shader(GLuint type, const GLchar *src, GLuint *shader) {
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*shader = GL_CALL(glCreateShader(type));
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int len = strlen(src);
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GL_CALL(glShaderSource(*shader, 1, &src, &len));
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GL_CALL(glCompileShader(*shader));
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GLint success;
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GL_CALL(glGetShaderiv(*shader, GL_COMPILE_STATUS, &success));
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if (success == GL_FALSE) {
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GLint loglen;
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GL_CALL(glGetShaderiv(*shader, GL_INFO_LOG_LENGTH, &loglen));
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GLchar msg[loglen];
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GL_CALL(glGetShaderInfoLog(*shader, loglen, &loglen, msg));
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wlr_log(L_ERROR, "Shader compilation failed");
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wlr_log(L_ERROR, "%s", msg);
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exit(1);
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return false;
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}
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return true;
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}
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static bool compile_program(const GLchar *vert_src,
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const GLchar *frag_src, GLuint *program) {
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GLuint vertex, fragment;
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if (!compile_shader(GL_VERTEX_SHADER, vert_src, &vertex)) {
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return false;
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}
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if (!compile_shader(GL_FRAGMENT_SHADER, frag_src, &fragment)) {
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glDeleteProgram(vertex);
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return false;
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}
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*program = GL_CALL(glCreateProgram());
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GL_CALL(glAttachShader(*program, vertex));
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GL_CALL(glAttachShader(*program, fragment));
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GL_CALL(glLinkProgram(*program));
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return true;
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}
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static void init_default_shaders() {
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if (shaders.initialized) {
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return;
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}
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if (!compile_program(vertex_src, fragment_src_RGB, &shaders.rgb)) {
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goto error;
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}
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if (!compile_program(vertex_src, fragment_src_RGBA, &shaders.rgba)) {
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goto error;
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}
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if (!compile_program(quad_vertex_src, quad_fragment_src, &shaders.quad)) {
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goto error;
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}
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if (!compile_program(quad_vertex_src, ellipse_fragment_src, &shaders.ellipse)) {
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goto error;
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}
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wlr_log(L_DEBUG, "Compiled default shaders");
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return;
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error:
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wlr_log(L_ERROR, "Failed to set up default shaders!");
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}
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static void init_globals() {
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init_default_shaders();
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}
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static void wlr_gles2_begin(struct wlr_renderer_state *state,
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struct wlr_output *output) {
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// TODO: let users customize the clear color?
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GL_CALL(glClearColor(0.25f, 0.25f, 0.25f, 1));
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GL_CALL(glClear(GL_COLOR_BUFFER_BIT));
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int32_t width = output->width;
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int32_t height = output->height;
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GL_CALL(glViewport(0, 0, width, height));
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// Note: maybe we should save output projection and remove some of the need
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// for users to sling matricies themselves
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}
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static void wlr_gles2_end(struct wlr_renderer_state *state) {
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// no-op
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}
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static struct wlr_surface *wlr_gles2_surface_init(struct wlr_renderer_state *state) {
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return gles2_surface_init();
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}
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static void draw_quad() {
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GLfloat verts[] = {
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1, 0, // top right
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0, 0, // top left
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1, 1, // bottom right
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0, 1, // bottom left
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};
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GLfloat texcoord[] = {
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1, 0, // top right
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0, 0, // top left
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1, 1, // bottom right
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0, 1, // bottom left
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};
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GL_CALL(glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 0, verts));
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GL_CALL(glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 0, texcoord));
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GL_CALL(glEnableVertexAttribArray(0));
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GL_CALL(glEnableVertexAttribArray(1));
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GL_CALL(glDrawArrays(GL_TRIANGLE_STRIP, 0, 4));
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GL_CALL(glDisableVertexAttribArray(0));
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GL_CALL(glDisableVertexAttribArray(1));
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}
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static bool wlr_gles2_render_surface(struct wlr_renderer_state *state,
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struct wlr_surface *surface, const float (*matrix)[16]) {
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assert(surface && surface->valid);
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switch (surface->format) {
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case GL_RGB:
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GL_CALL(glUseProgram(shaders.rgb));
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break;
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case GL_RGBA:
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GL_CALL(glUseProgram(shaders.rgba));
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break;
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default:
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wlr_log(L_ERROR, "No shader for this surface format");
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return false;
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}
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gles2_flush_errors();
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wlr_surface_bind(surface);
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GL_CALL(glUniformMatrix4fv(0, 1, GL_FALSE, *matrix));
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draw_quad();
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return true;
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}
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static void wlr_gles2_render_quad(struct wlr_renderer_state *state,
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const float (*color)[4], const float (*matrix)[16]) {
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GL_CALL(glUseProgram(shaders.quad));
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GL_CALL(glUniformMatrix4fv(0, 1, GL_TRUE, *matrix));
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GL_CALL(glUniform4f(1, (*color)[0], (*color)[1], (*color)[2], (*color)[3]));
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draw_quad();
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}
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static void wlr_gles2_render_ellipse(struct wlr_renderer_state *state,
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const float (*color)[4], const float (*matrix)[16]) {
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GL_CALL(glUseProgram(shaders.ellipse));
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GL_CALL(glUniformMatrix4fv(0, 1, GL_TRUE, *matrix));
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GL_CALL(glUniform4f(1, (*color)[0], (*color)[1], (*color)[2], (*color)[3]));
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draw_quad();
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}
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static void wlr_gles2_destroy(struct wlr_renderer_state *state) {
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// no-op
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}
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static struct wlr_renderer_impl wlr_renderer_impl = {
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.begin = wlr_gles2_begin,
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.end = wlr_gles2_end,
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.surface_init = wlr_gles2_surface_init,
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.render_with_matrix = wlr_gles2_render_surface,
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.render_quad = wlr_gles2_render_quad,
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.render_ellipse = wlr_gles2_render_ellipse,
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.destroy = wlr_gles2_destroy
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};
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struct wlr_renderer *wlr_gles2_renderer_init() {
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init_globals();
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return wlr_renderer_init(NULL, &wlr_renderer_impl);
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}
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