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- /*
- Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
-
- This software is provided 'as-is', without any express or implied
- warranty. In no event will the authors be held liable for any damages
- arising from the use of this software.
-
- Permission is granted to anyone to use this software for any purpose,
- including commercial applications, and to alter it and redistribute it
- freely.
- */
- #include <stdlib.h>
- #include <stdio.h>
- #include <string.h>
- #include <math.h>
-
- #include "SDL_test_common.h"
-
- #ifdef __MACOS__
- #define HAVE_OPENGL
- #endif
-
- #ifdef HAVE_OPENGL
-
- #include "SDL_opengl.h"
-
- typedef struct GL_Context
- {
- #define SDL_PROC(ret,func,params) ret (APIENTRY *func) params;
- #include "../src/render/opengl/SDL_glfuncs.h"
- #undef SDL_PROC
- } GL_Context;
-
-
- /* Undefine this if you want a flat cube instead of a rainbow cube */
- #define SHADED_CUBE
-
- static SDLTest_CommonState *state;
- static SDL_GLContext context;
- static GL_Context ctx;
-
- static int LoadContext(GL_Context * data)
- {
- #if SDL_VIDEO_DRIVER_UIKIT
- #define __SDL_NOGETPROCADDR__
- #elif SDL_VIDEO_DRIVER_ANDROID
- #define __SDL_NOGETPROCADDR__
- #elif SDL_VIDEO_DRIVER_PANDORA
- #define __SDL_NOGETPROCADDR__
- #endif
-
- #if defined __SDL_NOGETPROCADDR__
- #define SDL_PROC(ret,func,params) data->func=func;
- #else
- #define SDL_PROC(ret,func,params) \
- do { \
- data->func = SDL_GL_GetProcAddress(#func); \
- if ( ! data->func ) { \
- return SDL_SetError("Couldn't load GL function %s: %s", #func, SDL_GetError()); \
- } \
- } while ( 0 );
- #endif /* __SDL_NOGETPROCADDR__ */
-
- #include "../src/render/opengl/SDL_glfuncs.h"
- #undef SDL_PROC
- return 0;
- }
-
-
- /* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
- static void
- quit(int rc)
- {
- if (context) {
- /* SDL_GL_MakeCurrent(0, NULL); *//* doesn't do anything */
- SDL_GL_DeleteContext(context);
- }
- SDLTest_CommonQuit(state);
- exit(rc);
- }
-
- static void
- Render()
- {
- static float color[8][3] = {
- {1.0, 1.0, 0.0},
- {1.0, 0.0, 0.0},
- {0.0, 0.0, 0.0},
- {0.0, 1.0, 0.0},
- {0.0, 1.0, 1.0},
- {1.0, 1.0, 1.0},
- {1.0, 0.0, 1.0},
- {0.0, 0.0, 1.0}
- };
- static float cube[8][3] = {
- {0.5, 0.5, -0.5},
- {0.5, -0.5, -0.5},
- {-0.5, -0.5, -0.5},
- {-0.5, 0.5, -0.5},
- {-0.5, 0.5, 0.5},
- {0.5, 0.5, 0.5},
- {0.5, -0.5, 0.5},
- {-0.5, -0.5, 0.5}
- };
-
- /* Do our drawing, too. */
- ctx.glClearColor(0.0, 0.0, 0.0, 1.0);
- ctx.glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-
- ctx.glBegin(GL_QUADS);
-
- #ifdef SHADED_CUBE
- ctx.glColor3fv(color[0]);
- ctx.glVertex3fv(cube[0]);
- ctx.glColor3fv(color[1]);
- ctx.glVertex3fv(cube[1]);
- ctx.glColor3fv(color[2]);
- ctx.glVertex3fv(cube[2]);
- ctx.glColor3fv(color[3]);
- ctx.glVertex3fv(cube[3]);
-
- ctx.glColor3fv(color[3]);
- ctx.glVertex3fv(cube[3]);
- ctx.glColor3fv(color[4]);
- ctx.glVertex3fv(cube[4]);
- ctx.glColor3fv(color[7]);
- ctx.glVertex3fv(cube[7]);
- ctx.glColor3fv(color[2]);
- ctx.glVertex3fv(cube[2]);
-
- ctx.glColor3fv(color[0]);
- ctx.glVertex3fv(cube[0]);
- ctx.glColor3fv(color[5]);
- ctx.glVertex3fv(cube[5]);
- ctx.glColor3fv(color[6]);
- ctx.glVertex3fv(cube[6]);
- ctx.glColor3fv(color[1]);
- ctx.glVertex3fv(cube[1]);
-
- ctx.glColor3fv(color[5]);
- ctx.glVertex3fv(cube[5]);
- ctx.glColor3fv(color[4]);
- ctx.glVertex3fv(cube[4]);
- ctx.glColor3fv(color[7]);
- ctx.glVertex3fv(cube[7]);
- ctx.glColor3fv(color[6]);
- ctx.glVertex3fv(cube[6]);
-
- ctx.glColor3fv(color[5]);
- ctx.glVertex3fv(cube[5]);
- ctx.glColor3fv(color[0]);
- ctx.glVertex3fv(cube[0]);
- ctx.glColor3fv(color[3]);
- ctx.glVertex3fv(cube[3]);
- ctx.glColor3fv(color[4]);
- ctx.glVertex3fv(cube[4]);
-
- ctx.glColor3fv(color[6]);
- ctx.glVertex3fv(cube[6]);
- ctx.glColor3fv(color[1]);
- ctx.glVertex3fv(cube[1]);
- ctx.glColor3fv(color[2]);
- ctx.glVertex3fv(cube[2]);
- ctx.glColor3fv(color[7]);
- ctx.glVertex3fv(cube[7]);
- #else /* flat cube */
- ctx.glColor3f(1.0, 0.0, 0.0);
- ctx.glVertex3fv(cube[0]);
- ctx.glVertex3fv(cube[1]);
- ctx.glVertex3fv(cube[2]);
- ctx.glVertex3fv(cube[3]);
-
- ctx.glColor3f(0.0, 1.0, 0.0);
- ctx.glVertex3fv(cube[3]);
- ctx.glVertex3fv(cube[4]);
- ctx.glVertex3fv(cube[7]);
- ctx.glVertex3fv(cube[2]);
-
- ctx.glColor3f(0.0, 0.0, 1.0);
- ctx.glVertex3fv(cube[0]);
- ctx.glVertex3fv(cube[5]);
- ctx.glVertex3fv(cube[6]);
- ctx.glVertex3fv(cube[1]);
-
- ctx.glColor3f(0.0, 1.0, 1.0);
- ctx.glVertex3fv(cube[5]);
- ctx.glVertex3fv(cube[4]);
- ctx.glVertex3fv(cube[7]);
- ctx.glVertex3fv(cube[6]);
-
- ctx.glColor3f(1.0, 1.0, 0.0);
- ctx.glVertex3fv(cube[5]);
- ctx.glVertex3fv(cube[0]);
- ctx.glVertex3fv(cube[3]);
- ctx.glVertex3fv(cube[4]);
-
- ctx.glColor3f(1.0, 0.0, 1.0);
- ctx.glVertex3fv(cube[6]);
- ctx.glVertex3fv(cube[1]);
- ctx.glVertex3fv(cube[2]);
- ctx.glVertex3fv(cube[7]);
- #endif /* SHADED_CUBE */
-
- ctx.glEnd();
-
- ctx.glMatrixMode(GL_MODELVIEW);
- ctx.glRotatef(5.0, 1.0, 1.0, 1.0);
- }
-
- int
- main(int argc, char *argv[])
- {
- int fsaa, accel;
- int value;
- int i, done;
- SDL_DisplayMode mode;
- SDL_Event event;
- Uint32 then, now, frames;
- int status;
- int dw, dh;
- int swap_interval = 0;
-
- /* Enable standard application logging */
- SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
-
- /* Initialize parameters */
- fsaa = 0;
- accel = -1;
-
- /* Initialize test framework */
- state = SDLTest_CommonCreateState(argv, SDL_INIT_VIDEO);
- if (!state) {
- return 1;
- }
- for (i = 1; i < argc;) {
- int consumed;
-
- consumed = SDLTest_CommonArg(state, i);
- if (consumed == 0) {
- if (SDL_strcasecmp(argv[i], "--fsaa") == 0 && i+1 < argc) {
- fsaa = SDL_atoi(argv[i+1]);
- consumed = 2;
- } else if (SDL_strcasecmp(argv[i], "--accel") == 0 && i+1 < argc) {
- accel = SDL_atoi(argv[i+1]);
- consumed = 2;
- } else {
- consumed = -1;
- }
- }
- if (consumed < 0) {
- static const char *options[] = { "[--fsaa n]", "[--accel n]", NULL };
- SDLTest_CommonLogUsage(state, argv[0], options);
- quit(1);
- }
- i += consumed;
- }
-
- /* Set OpenGL parameters */
- state->window_flags |= SDL_WINDOW_OPENGL;
- state->gl_red_size = 5;
- state->gl_green_size = 5;
- state->gl_blue_size = 5;
- state->gl_depth_size = 16;
- state->gl_double_buffer = 1;
- if (fsaa) {
- state->gl_multisamplebuffers = 1;
- state->gl_multisamplesamples = fsaa;
- }
- if (accel >= 0) {
- state->gl_accelerated = accel;
- }
-
- if (!SDLTest_CommonInit(state)) {
- quit(2);
- }
-
- /* Create OpenGL context */
- context = SDL_GL_CreateContext(state->windows[0]);
- if (!context) {
- SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "SDL_GL_CreateContext(): %s\n", SDL_GetError());
- quit(2);
- }
-
- /* Important: call this *after* creating the context */
- if (LoadContext(&ctx) < 0) {
- SDL_Log("Could not load GL functions\n");
- quit(2);
- return 0;
- }
-
- if (state->render_flags & SDL_RENDERER_PRESENTVSYNC) {
- /* try late-swap-tearing first. If not supported, try normal vsync. */
- if (SDL_GL_SetSwapInterval(-1) == 0) {
- swap_interval = -1;
- } else {
- SDL_GL_SetSwapInterval(1);
- swap_interval = 1;
- }
- } else {
- SDL_GL_SetSwapInterval(0); /* disable vsync. */
- swap_interval = 0;
- }
-
- SDL_GetCurrentDisplayMode(0, &mode);
- SDL_Log("Screen BPP : %" SDL_PRIu32 "\n", SDL_BITSPERPIXEL(mode.format));
- SDL_Log("Swap Interval : %d\n", SDL_GL_GetSwapInterval());
- SDL_GetWindowSize(state->windows[0], &dw, &dh);
- SDL_Log("Window Size : %d,%d\n", dw, dh);
- SDL_GL_GetDrawableSize(state->windows[0], &dw, &dh);
- SDL_Log("Draw Size : %d,%d\n", dw, dh);
- SDL_Log("\n");
- SDL_Log("Vendor : %s\n", ctx.glGetString(GL_VENDOR));
- SDL_Log("Renderer : %s\n", ctx.glGetString(GL_RENDERER));
- SDL_Log("Version : %s\n", ctx.glGetString(GL_VERSION));
- SDL_Log("Extensions : %s\n", ctx.glGetString(GL_EXTENSIONS));
- SDL_Log("\n");
-
- status = SDL_GL_GetAttribute(SDL_GL_RED_SIZE, &value);
- if (!status) {
- SDL_Log("SDL_GL_RED_SIZE: requested %d, got %d\n", 5, value);
- } else {
- SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Failed to get SDL_GL_RED_SIZE: %s\n", SDL_GetError());
- }
- status = SDL_GL_GetAttribute(SDL_GL_GREEN_SIZE, &value);
- if (!status) {
- SDL_Log("SDL_GL_GREEN_SIZE: requested %d, got %d\n", 5, value);
- } else {
- SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Failed to get SDL_GL_GREEN_SIZE: %s\n", SDL_GetError());
- }
- status = SDL_GL_GetAttribute(SDL_GL_BLUE_SIZE, &value);
- if (!status) {
- SDL_Log("SDL_GL_BLUE_SIZE: requested %d, got %d\n", 5, value);
- } else {
- SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Failed to get SDL_GL_BLUE_SIZE: %s\n", SDL_GetError());
- }
- status = SDL_GL_GetAttribute(SDL_GL_DEPTH_SIZE, &value);
- if (!status) {
- SDL_Log("SDL_GL_DEPTH_SIZE: requested %d, got %d\n", 16, value);
- } else {
- SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Failed to get SDL_GL_DEPTH_SIZE: %s\n", SDL_GetError());
- }
- if (fsaa) {
- status = SDL_GL_GetAttribute(SDL_GL_MULTISAMPLEBUFFERS, &value);
- if (!status) {
- SDL_Log("SDL_GL_MULTISAMPLEBUFFERS: requested 1, got %d\n", value);
- } else {
- SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Failed to get SDL_GL_MULTISAMPLEBUFFERS: %s\n",
- SDL_GetError());
- }
- status = SDL_GL_GetAttribute(SDL_GL_MULTISAMPLESAMPLES, &value);
- if (!status) {
- SDL_Log("SDL_GL_MULTISAMPLESAMPLES: requested %d, got %d\n", fsaa,
- value);
- } else {
- SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Failed to get SDL_GL_MULTISAMPLESAMPLES: %s\n",
- SDL_GetError());
- }
- }
- if (accel >= 0) {
- status = SDL_GL_GetAttribute(SDL_GL_ACCELERATED_VISUAL, &value);
- if (!status) {
- SDL_Log("SDL_GL_ACCELERATED_VISUAL: requested %d, got %d\n", accel,
- value);
- } else {
- SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Failed to get SDL_GL_ACCELERATED_VISUAL: %s\n",
- SDL_GetError());
- }
- }
-
- /* Set rendering settings */
- ctx.glMatrixMode(GL_PROJECTION);
- ctx.glLoadIdentity();
- ctx.glOrtho(-2.0, 2.0, -2.0, 2.0, -20.0, 20.0);
- ctx.glMatrixMode(GL_MODELVIEW);
- ctx.glLoadIdentity();
- ctx.glEnable(GL_DEPTH_TEST);
- ctx.glDepthFunc(GL_LESS);
- ctx.glShadeModel(GL_SMOOTH);
-
- /* Main render loop */
- frames = 0;
- then = SDL_GetTicks();
- done = 0;
- while (!done) {
- SDL_bool update_swap_interval = SDL_FALSE;
-
- /* Check for events */
- ++frames;
- while (SDL_PollEvent(&event)) {
- SDLTest_CommonEvent(state, &event, &done);
- if (event.type == SDL_KEYDOWN) {
- if (event.key.keysym.sym == SDLK_o) {
- swap_interval--;
- update_swap_interval = SDL_TRUE;
- } else if (event.key.keysym.sym == SDLK_p) {
- swap_interval++;
- update_swap_interval = SDL_TRUE;
- }
- }
- }
-
- if (update_swap_interval) {
- SDL_Log("Swap interval to be set to %d\n", swap_interval);
- }
-
- for (i = 0; i < state->num_windows; ++i) {
- int w, h;
- if (state->windows[i] == NULL)
- continue;
- SDL_GL_MakeCurrent(state->windows[i], context);
- if (update_swap_interval) {
- SDL_GL_SetSwapInterval(swap_interval);
- }
- SDL_GL_GetDrawableSize(state->windows[i], &w, &h);
- ctx.glViewport(0, 0, w, h);
- Render();
- SDL_GL_SwapWindow(state->windows[i]);
- }
- }
-
- /* Print out some timing information */
- now = SDL_GetTicks();
- if (now > then) {
- SDL_Log("%2.2f frames per second\n",
- ((double) frames * 1000) / (now - then));
- }
- quit(0);
- return 0;
- }
-
- #else /* HAVE_OPENGL */
-
- int
- main(int argc, char *argv[])
- {
- SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "No OpenGL support on this system\n");
- return 1;
- }
-
- #endif /* HAVE_OPENGL */
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