diff options
author | 2016-02-27 16:28:05 +0100 | |
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committer | 2016-02-27 16:53:49 +0100 | |
commit | cf6dc7d370407914020f3e623719f09c8668c692 (patch) | |
tree | 46b3416d091b4c09b50fba7ffcbd310aed032cc8 /3rdparty/SDL2/test/testrendertarget.c | |
parent | 64135e73f973d9b95beb0c60b65feb34fbfec64a (diff) |
Placed SDL2 source since we need it on some platforms (nw)
Diffstat (limited to '3rdparty/SDL2/test/testrendertarget.c')
-rw-r--r-- | 3rdparty/SDL2/test/testrendertarget.c | 335 |
1 files changed, 335 insertions, 0 deletions
diff --git a/3rdparty/SDL2/test/testrendertarget.c b/3rdparty/SDL2/test/testrendertarget.c new file mode 100644 index 00000000000..c5e1dce05b7 --- /dev/null +++ b/3rdparty/SDL2/test/testrendertarget.c @@ -0,0 +1,335 @@ +/* + Copyright (C) 1997-2016 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. +*/ +/* Simple program: Move N sprites around on the screen as fast as possible */ + +#include <stdlib.h> +#include <stdio.h> +#include <time.h> + +#ifdef __EMSCRIPTEN__ +#include <emscripten/emscripten.h> +#endif + +#include "SDL_test_common.h" + + +static SDLTest_CommonState *state; + +typedef struct { + SDL_Window *window; + SDL_Renderer *renderer; + SDL_Texture *background; + SDL_Texture *sprite; + SDL_Rect sprite_rect; + int scale_direction; +} DrawState; + +DrawState *drawstates; +int done; +SDL_bool test_composite = SDL_FALSE; + +/* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */ +static void +quit(int rc) +{ + SDLTest_CommonQuit(state); + exit(rc); +} + +SDL_Texture * +LoadTexture(SDL_Renderer *renderer, char *file, SDL_bool transparent) +{ + SDL_Surface *temp; + SDL_Texture *texture; + + /* Load the sprite image */ + temp = SDL_LoadBMP(file); + if (temp == NULL) { + SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't load %s: %s", file, SDL_GetError()); + return NULL; + } + + /* Set transparent pixel as the pixel at (0,0) */ + if (transparent) { + if (temp->format->palette) { + SDL_SetColorKey(temp, SDL_TRUE, *(Uint8 *) temp->pixels); + } else { + switch (temp->format->BitsPerPixel) { + case 15: + SDL_SetColorKey(temp, SDL_TRUE, + (*(Uint16 *) temp->pixels) & 0x00007FFF); + break; + case 16: + SDL_SetColorKey(temp, SDL_TRUE, *(Uint16 *) temp->pixels); + break; + case 24: + SDL_SetColorKey(temp, SDL_TRUE, + (*(Uint32 *) temp->pixels) & 0x00FFFFFF); + break; + case 32: + SDL_SetColorKey(temp, SDL_TRUE, *(Uint32 *) temp->pixels); + break; + } + } + } + + /* Create textures from the image */ + texture = SDL_CreateTextureFromSurface(renderer, temp); + if (!texture) { + SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't create texture: %s\n", SDL_GetError()); + SDL_FreeSurface(temp); + return NULL; + } + SDL_FreeSurface(temp); + + /* We're ready to roll. :) */ + return texture; +} + +SDL_bool +DrawComposite(DrawState *s) +{ + SDL_Rect viewport, R; + SDL_Texture *target; + + static SDL_bool blend_tested = SDL_FALSE; + if (!blend_tested) { + SDL_Texture *A, *B; + Uint32 P; + + A = SDL_CreateTexture(s->renderer, SDL_PIXELFORMAT_ARGB8888, SDL_TEXTUREACCESS_TARGET, 1, 1); + SDL_SetTextureBlendMode(A, SDL_BLENDMODE_BLEND); + + B = SDL_CreateTexture(s->renderer, SDL_PIXELFORMAT_ARGB8888, SDL_TEXTUREACCESS_TARGET, 1, 1); + SDL_SetTextureBlendMode(B, SDL_BLENDMODE_BLEND); + + SDL_SetRenderTarget(s->renderer, A); + SDL_SetRenderDrawColor(s->renderer, 0x00, 0x00, 0x00, 0x80); + SDL_RenderFillRect(s->renderer, NULL); + + SDL_SetRenderTarget(s->renderer, B); + SDL_SetRenderDrawColor(s->renderer, 0x00, 0x00, 0x00, 0x00); + SDL_RenderFillRect(s->renderer, NULL); + SDL_RenderCopy(s->renderer, A, NULL, NULL); + SDL_RenderReadPixels(s->renderer, NULL, SDL_PIXELFORMAT_ARGB8888, &P, sizeof(P)); + + SDL_Log("Blended pixel: 0x%8.8X\n", P); + + SDL_DestroyTexture(A); + SDL_DestroyTexture(B); + blend_tested = SDL_TRUE; + } + + SDL_RenderGetViewport(s->renderer, &viewport); + + target = SDL_CreateTexture(s->renderer, SDL_PIXELFORMAT_ARGB8888, SDL_TEXTUREACCESS_TARGET, viewport.w, viewport.h); + SDL_SetTextureBlendMode(target, SDL_BLENDMODE_BLEND); + SDL_SetRenderTarget(s->renderer, target); + + /* Draw the background. + This is solid black so when the sprite is copied to it, any per-pixel alpha will be blended through. + */ + SDL_SetRenderDrawColor(s->renderer, 0x00, 0x00, 0x00, 0x00); + SDL_RenderFillRect(s->renderer, NULL); + + /* Scale and draw the sprite */ + s->sprite_rect.w += s->scale_direction; + s->sprite_rect.h += s->scale_direction; + if (s->scale_direction > 0) { + if (s->sprite_rect.w >= viewport.w || s->sprite_rect.h >= viewport.h) { + s->scale_direction = -1; + } + } else { + if (s->sprite_rect.w <= 1 || s->sprite_rect.h <= 1) { + s->scale_direction = 1; + } + } + s->sprite_rect.x = (viewport.w - s->sprite_rect.w) / 2; + s->sprite_rect.y = (viewport.h - s->sprite_rect.h) / 2; + + SDL_RenderCopy(s->renderer, s->sprite, NULL, &s->sprite_rect); + + SDL_SetRenderTarget(s->renderer, NULL); + SDL_RenderCopy(s->renderer, s->background, NULL, NULL); + + SDL_SetRenderDrawBlendMode(s->renderer, SDL_BLENDMODE_BLEND); + SDL_SetRenderDrawColor(s->renderer, 0xff, 0x00, 0x00, 0x80); + R.x = 0; + R.y = 0; + R.w = 100; + R.h = 100; + SDL_RenderFillRect(s->renderer, &R); + SDL_SetRenderDrawBlendMode(s->renderer, SDL_BLENDMODE_NONE); + + SDL_RenderCopy(s->renderer, target, NULL, NULL); + SDL_DestroyTexture(target); + + /* Update the screen! */ + SDL_RenderPresent(s->renderer); + return SDL_TRUE; +} + +SDL_bool +Draw(DrawState *s) +{ + SDL_Rect viewport; + SDL_Texture *target; + + SDL_RenderGetViewport(s->renderer, &viewport); + + target = SDL_CreateTexture(s->renderer, SDL_PIXELFORMAT_ARGB8888, SDL_TEXTUREACCESS_TARGET, viewport.w, viewport.h); + if (!target) { + SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't create render target texture: %s\n", SDL_GetError()); + return SDL_FALSE; + } + SDL_SetRenderTarget(s->renderer, target); + + /* Draw the background */ + SDL_RenderCopy(s->renderer, s->background, NULL, NULL); + + /* Scale and draw the sprite */ + s->sprite_rect.w += s->scale_direction; + s->sprite_rect.h += s->scale_direction; + if (s->scale_direction > 0) { + if (s->sprite_rect.w >= viewport.w || s->sprite_rect.h >= viewport.h) { + s->scale_direction = -1; + } + } else { + if (s->sprite_rect.w <= 1 || s->sprite_rect.h <= 1) { + s->scale_direction = 1; + } + } + s->sprite_rect.x = (viewport.w - s->sprite_rect.w) / 2; + s->sprite_rect.y = (viewport.h - s->sprite_rect.h) / 2; + + SDL_RenderCopy(s->renderer, s->sprite, NULL, &s->sprite_rect); + + SDL_SetRenderTarget(s->renderer, NULL); + SDL_RenderCopy(s->renderer, target, NULL, NULL); + SDL_DestroyTexture(target); + + /* Update the screen! */ + SDL_RenderPresent(s->renderer); + return SDL_TRUE; +} + +void +loop() +{ + int i; + SDL_Event event; + + /* Check for events */ + while (SDL_PollEvent(&event)) { + SDLTest_CommonEvent(state, &event, &done); + } + for (i = 0; i < state->num_windows; ++i) { + if (state->windows[i] == NULL) + continue; + if (test_composite) { + if (!DrawComposite(&drawstates[i])) done = 1; + } else { + if (!Draw(&drawstates[i])) done = 1; + } + } +#ifdef __EMSCRIPTEN__ + if (done) { + emscripten_cancel_main_loop(); + } +#endif +} + +int +main(int argc, char *argv[]) +{ + int i; + int frames; + Uint32 then, now; + + /* Enable standard application logging */ + SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO); + + /* 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) { + consumed = -1; + if (SDL_strcasecmp(argv[i], "--composite") == 0) { + test_composite = SDL_TRUE; + consumed = 1; + } + } + if (consumed < 0) { + SDL_Log("Usage: %s %s [--composite]\n", + argv[0], SDLTest_CommonUsage(state)); + quit(1); + } + i += consumed; + } + if (!SDLTest_CommonInit(state)) { + quit(2); + } + + drawstates = SDL_stack_alloc(DrawState, state->num_windows); + for (i = 0; i < state->num_windows; ++i) { + DrawState *drawstate = &drawstates[i]; + + drawstate->window = state->windows[i]; + drawstate->renderer = state->renderers[i]; + if (test_composite) { + drawstate->sprite = LoadTexture(drawstate->renderer, "icon-alpha.bmp", SDL_TRUE); + } else { + drawstate->sprite = LoadTexture(drawstate->renderer, "icon.bmp", SDL_TRUE); + } + drawstate->background = LoadTexture(drawstate->renderer, "sample.bmp", SDL_FALSE); + if (!drawstate->sprite || !drawstate->background) { + quit(2); + } + SDL_QueryTexture(drawstate->sprite, NULL, NULL, + &drawstate->sprite_rect.w, &drawstate->sprite_rect.h); + drawstate->scale_direction = 1; + } + + /* Main render loop */ + frames = 0; + then = SDL_GetTicks(); + done = 0; + +#ifdef __EMSCRIPTEN__ + emscripten_set_main_loop(loop, 0, 1); +#else + while (!done) { + ++frames; + loop(); + } +#endif + + /* Print out some timing information */ + now = SDL_GetTicks(); + if (now > then) { + double fps = ((double) frames * 1000) / (now - then); + SDL_Log("%2.2f frames per second\n", fps); + } + + SDL_stack_free(drawstates); + + quit(0); + return 0; +} + +/* vi: set ts=4 sw=4 expandtab: */ |