From 44959a21efba81f11c7887ff8f6663928e22cdb9 Mon Sep 17 00:00:00 2001 From: Sam Lantinga Date: Fri, 15 Nov 2013 22:05:26 -0800 Subject: [PATCH] Added viewport test, contributed by Andreas Schiffler and improved by me and Ryan Gordon. If it works correctly you should see a square moving from the upper left to the lower right, with a little yellow box at the top of the moving square. You can pass --target as a command line option to have it use a render target instead of rendering directly to the screen. The output should be identical in this case. --- test/Makefile.in | 4 + test/testviewport.c | 184 ++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 188 insertions(+) create mode 100644 test/testviewport.c diff --git a/test/Makefile.in b/test/Makefile.in index f57c46029..36b00e486 100644 --- a/test/Makefile.in +++ b/test/Makefile.in @@ -49,6 +49,7 @@ TARGETS = \ teststreaming$(EXE) \ testtimer$(EXE) \ testver$(EXE) \ + testviewport$(EXE) \ testwm2$(EXE) \ torturethread$(EXE) \ testrendercopyex$(EXE) \ @@ -218,6 +219,9 @@ testtimer$(EXE): $(srcdir)/testtimer.c testver$(EXE): $(srcdir)/testver.c $(CC) -o $@ $^ $(CFLAGS) $(LIBS) +testviewport$(EXE): $(srcdir)/testviewport.c + $(CC) -o $@ $^ $(CFLAGS) $(LIBS) + testwm2$(EXE): $(srcdir)/testwm2.c $(CC) -o $@ $^ $(CFLAGS) $(LIBS) diff --git a/test/testviewport.c b/test/testviewport.c new file mode 100644 index 000000000..022d9880d --- /dev/null +++ b/test/testviewport.c @@ -0,0 +1,184 @@ +/* + Copyright (C) 1997-2013 Sam Lantinga + + 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: Check viewports */ + +#include +#include +#include + +#include "SDL_test.h" +#include "SDL_test_common.h" + + +static SDLTest_CommonState *state; + +/* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */ +static void +quit(int rc) +{ + SDLTest_CommonQuit(state); + exit(rc); +} + +void +DrawOnViewport(SDL_Renderer * renderer, SDL_Rect viewport) +{ + SDL_Rect rect; + + /* Set the viewport */ + SDL_RenderSetViewport(renderer, &viewport); + + /* Draw a gray background */ + SDL_SetRenderDrawColor(renderer, 0x80, 0x80, 0x80, 0xFF); + SDL_RenderClear(renderer); + + /* Test inside points */ + SDL_SetRenderDrawColor(renderer, 0xFF, 0xFF, 0xF, 0xFF); + SDL_RenderDrawPoint(renderer, viewport.h/2 + 10, viewport.w/2); + SDL_RenderDrawPoint(renderer, viewport.h/2 - 10, viewport.w/2); + SDL_RenderDrawPoint(renderer, viewport.h/2 , viewport.w/2 - 10); + SDL_RenderDrawPoint(renderer, viewport.h/2 , viewport.w/2 + 10); + + /* Test horizontal and vertical lines */ + SDL_SetRenderDrawColor(renderer, 0x00, 0xFF, 0x00, 0xFF); + SDL_RenderDrawLine(renderer, 1, 0, viewport.w-2, 0); + SDL_RenderDrawLine(renderer, 1, viewport.h-1, viewport.w-2, viewport.h-1); + SDL_RenderDrawLine(renderer, 0, 1, 0, viewport.h-2); + SDL_RenderDrawLine(renderer, viewport.w-1, 1, viewport.w-1, viewport.h-2); + + /* Test diagonal lines */ + SDL_SetRenderDrawColor(renderer, 0x00, 0x00, 0xFF, 0xFF); + SDL_RenderDrawLine(renderer, 0, 0, + viewport.w-1, viewport.h-1); + SDL_RenderDrawLine(renderer, viewport.w-1, 0, + 0, viewport.h-1); + + /* Test outside points */ + SDL_SetRenderDrawColor(renderer, 0xFF, 0xFF, 0xF, 0xFF); + SDL_RenderDrawPoint(renderer, viewport.h/2 + viewport.h, viewport.w/2); + SDL_RenderDrawPoint(renderer, viewport.h/2 - viewport.h, viewport.w/2); + SDL_RenderDrawPoint(renderer, viewport.h/2 , viewport.w/2 - viewport.w); + SDL_RenderDrawPoint(renderer, viewport.h/2 , viewport.w/2 + viewport.w); + + /* Add a box at the top */ + rect.w = 8; + rect.h = 8; + rect.x = (viewport.w - rect.w) / 2; + rect.y = 0; + SDL_RenderFillRect(renderer, &rect); +} + +int +main(int argc, char *argv[]) +{ + int i, j, done; + SDL_Event event; + Uint32 then, now, frames; + SDL_Rect viewport; + SDL_bool use_target = SDL_FALSE; + + /* 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], "--target") == 0) { + use_target = SDL_TRUE; + consumed = 1; + } + } + if (consumed < 0) { + SDL_Log("Usage: %s %s [--target]\n", + argv[0], SDLTest_CommonUsage(state)); + quit(1); + } + i += consumed; + } + if (!SDLTest_CommonInit(state)) { + quit(2); + } + + if (use_target) { + int w, h; + + for (i = 0; i < state->num_windows; ++i) { + SDL_GetWindowSize(state->windows[i], &w, &h); + state->targets[i] = SDL_CreateTexture(state->renderers[i], SDL_PIXELFORMAT_RGBA8888, SDL_TEXTUREACCESS_TARGET, w, h); + SDL_SetRenderTarget(state->renderers[i], state->targets[i]); + } + } + + for (i = 0; i < state->num_windows; ++i) { + SDL_Renderer *renderer = state->renderers[i]; + SDL_SetRenderDrawColor(renderer, 0xA0, 0xA0, 0xA0, 0xFF); + SDL_RenderClear(renderer); + } + + /* Main render loop */ + frames = 0; + then = SDL_GetTicks(); + done = 0; + j = 0; + while (!done) { + /* Check for events */ + ++frames; + while (SDL_PollEvent(&event)) { + SDLTest_CommonEvent(state, &event, &done); + } + + /* Move a viewport box in steps around the screen */ + viewport.x = j * 100; + viewport.y = viewport.x; + viewport.w = 100 + j * 50; + viewport.h = 100 + j * 50; + j = (j + 1) % 4; + SDL_Log("Current Viewport x=%i y=%i w=%i h=%i", viewport.x, viewport.y, viewport.w, viewport.h); + + for (i = 0; i < state->num_windows; ++i) { + if (state->windows[i] == NULL) + continue; + + /* Draw using viewport */ + DrawOnViewport(state->renderers[i], viewport); + + /* Update the screen! */ + if (use_target) { + SDL_SetRenderTarget(state->renderers[i], NULL); + SDL_RenderCopy(state->renderers[i], state->targets[i], NULL, NULL); + SDL_RenderPresent(state->renderers[i]); + SDL_SetRenderTarget(state->renderers[i], state->targets[i]); + } else { + SDL_RenderPresent(state->renderers[i]); + } + } + + SDL_Delay(1000); + } + + /* 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); + } + quit(0); + return 0; +} + +/* vi: set ts=4 sw=4 expandtab: */