From ba3a68a4f73f6653b1e1b095abc08234dedc504d Mon Sep 17 00:00:00 2001 From: Jack Jamison Date: Sat, 11 Oct 2025 01:45:08 -0400 Subject: added graphics.h --- graphics.c | 79 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 79 insertions(+) create mode 100644 graphics.c (limited to 'graphics.c') diff --git a/graphics.c b/graphics.c new file mode 100644 index 0000000..33febff --- /dev/null +++ b/graphics.c @@ -0,0 +1,79 @@ +#include "graphics.h" + +bool init_gl(client_state* state) { + EGLint attrs[] = { + EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT, + EGL_CONFORMANT, EGL_OPENGL_BIT, + EGL_RED_SIZE, 8, + EGL_GREEN_SIZE, 8, + EGL_BLUE_SIZE, 8, + EGL_ALPHA_SIZE, 8, + EGL_DEPTH_SIZE, 24, + EGL_NONE + }; + + state->egl_window = wl_egl_window_create(state->surface, state->width, state->height); + if (!state->egl_window) { + fprintf(stderr, "ewindow\n"); + return false; + } + + + state->egl_display = eglGetDisplay(state->display); + if (state->egl_display == EGL_NO_DISPLAY) { + fprintf(stderr, "edisplay\n"); + return false; + } + { + EGLint major, minor; + if (eglInitialize(state->egl_display, &major, &minor) != EGL_TRUE) { + fprintf(stderr, "eglinit\n"); + return false; + } + + printf("EGL version %u.%u\n", major, minor); + } + eglBindAPI(EGL_OPENGL_API); + + EGLint num_configs; + if (eglChooseConfig(state->egl_display, attrs, &state->egl_config, 1, &num_configs) != EGL_TRUE) { + fprintf(stderr, "econfig: %d\n", eglGetError()); + return false; + } + + state->egl_surface = eglCreateWindowSurface(state->egl_display, state->egl_config, + (EGLNativeWindowType)state->egl_window, NULL); + if (state->egl_surface == EGL_NO_SURFACE) { + fprintf(stderr, "esurface\n"); + return false; + } + + state->egl_context = eglCreateContext(state->egl_display, state->egl_config, + EGL_NO_CONTEXT, NULL); + if (state->egl_context == EGL_NO_CONTEXT) { + fprintf(stderr, "econtext: %x\n", eglGetError()); + return false; + } + + eglMakeCurrent(state->egl_display, state->egl_surface, state->egl_surface, state->egl_context); + + if (!gladLoadGL()) { + fprintf(stderr, "gladLoadGL"); + return false; + } + + { + GLint major, minor; + glGetIntegerv(GL_MAJOR_VERSION, &major); + glGetIntegerv(GL_MINOR_VERSION, &minor); + printf("GL version %u.%u\n", major, minor); + } + + return true; +} + +void render_frame(client_state *state) { + glClearColor(1.0, 1.0, 1.0, 1.0); + glClear(GL_COLOR_BUFFER_BIT); + eglSwapBuffers(state->egl_display, state->egl_surface); +} -- cgit v1.2.3