testscale.c
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/*
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"
#define WINDOW_WIDTH 640
#define WINDOW_HEIGHT 480
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;
/* 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;
}
void
Draw(DrawState *s)
{
SDL_Rect viewport;
SDL_RenderGetViewport(s->renderer, &viewport);
/* 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);
/* Update the screen! */
SDL_RenderPresent(s->renderer);
}
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;
Draw(&drawstates[i]);
}
#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) {
SDL_Log("Usage: %s %s\n", argv[0], SDLTest_CommonUsage(state));
return 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];
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: */
DrawState::renderer
SDL_Renderer * renderer
Definition: testrendercopyex.c:29
SDL_PollEvent
#define SDL_PollEvent
Definition: SDL_dynapi_overrides.h:128
SDL_GetError
#define SDL_GetError
Definition: SDL_dynapi_overrides.h:119
DrawState::sprite_rect
SDL_Rect sprite_rect
Definition: testrendercopyex.c:32
s
GLdouble s
Definition: SDL_opengl.h:2056
Uint32
uint32_t Uint32
An unsigned 32-bit integer type.
Definition: SDL_stdinc.h:157
SDL_LoadBMP
#define SDL_LoadBMP(file)
Definition: SDL_surface.h:182
SDLTest_CommonCreateState
SDLTest_CommonState * SDLTest_CommonCreateState(char **argv, Uint32 flags)
Parse command line parameters and create common state.
Definition: SDL_test_common.c:36
window
SDL_Window * window
Definition: testautomation_render.c:26
texture
GLenum GLenum GLuint texture
Definition: SDL_opengl_glext.h:1178
SDLTest_CommonArg
int SDLTest_CommonArg(SDLTest_CommonState *state, int index)
Process one common argument.
Definition: SDL_test_common.c:83
SDL_Surface
A collection of pixels used in software blitting.
Definition: SDL_surface.h:69
state
static SDLTest_CommonState * state
Definition: testscale.c:27
SDL_Renderer
Definition: SDL_sysrender.h:76
background
SDL_Texture * background
Definition: testgamecontroller.c:67
SDL_test_common.h
SDLTest_CommonInit
SDL_bool SDLTest_CommonInit(SDLTest_CommonState *state)
Open test window.
Definition: SDL_test_common.c:645
DrawState::window
SDL_Window * window
Definition: testrendercopyex.c:28
LoadTexture
SDL_Texture * LoadTexture(SDL_Renderer *renderer, char *file, SDL_bool transparent)
Definition: testscale.c:50
SDL_Texture
Definition: SDL_sysrender.h:49
SDLTest_CommonState::windows
SDL_Window ** windows
Definition: SDL_test_common.h:78
SDL_LogError
#define SDL_LogError
Definition: SDL_dynapi_overrides.h:42
SDL_bool
SDL_bool
Definition: SDL_stdinc.h:126
SDLTest_CommonState::num_windows
int num_windows
Definition: SDL_test_common.h:77
SDL_RenderCopy
#define SDL_RenderCopy
Definition: SDL_dynapi_overrides.h:349
renderer
SDL_Renderer * renderer
Definition: testautomation_render.c:27
SDL_Log
#define SDL_Log
Definition: SDL_dynapi_overrides.h:37
drawstates
DrawState * drawstates
Definition: testscale.c:38
DrawState::scale_direction
int scale_direction
Definition: testrendercopyex.c:33
SDL_CreateTextureFromSurface
#define SDL_CreateTextureFromSurface
Definition: SDL_dynapi_overrides.h:313
SDLTest_CommonEvent
void SDLTest_CommonEvent(SDLTest_CommonState *state, SDL_Event *event, int *done)
Common event handler for test windows.
Definition: SDL_test_common.c:1295
SDL_GetTicks
Uint32 SDL_GetTicks(void)
Get the number of milliseconds since the SDL library initialization.
SDL_Surface::pixels
void * pixels
Definition: SDL_surface.h:75
SDL_FreeSurface
#define SDL_FreeSurface
Definition: SDL_dynapi_overrides.h:450
Uint8
uint8_t Uint8
An unsigned 8-bit integer type.
Definition: SDL_stdinc.h:139
SDL_stack_alloc
#define SDL_stack_alloc(type, count)
Definition: SDL_stdinc.h:326
event
struct _cl_event * event
Definition: SDL_opengl_glext.h:2649
SDL_PixelFormat::BitsPerPixel
Uint8 BitsPerPixel
Definition: SDL_pixels.h:303
Draw
void Draw(DrawState *s)
Definition: testscale.c:100
SDL_QueryTexture
#define SDL_QueryTexture
Definition: SDL_dynapi_overrides.h:314
SDL_RenderGetViewport
#define SDL_RenderGetViewport
Definition: SDL_dynapi_overrides.h:331
SDL_SetColorKey
#define SDL_SetColorKey
Definition: SDL_dynapi_overrides.h:457
SDL_LOG_PRIORITY_INFO
Definition: SDL_log.h:106
SDL_Rect::x
int x
Definition: SDL_rect.h:66
SDL_TRUE
Definition: SDL_stdinc.h:129
SDLTest_CommonUsage
const char * SDLTest_CommonUsage(SDLTest_CommonState *state)
Returns common usage information.
Definition: SDL_test_common.c:451
loop
void loop()
Definition: testscale.c:131
SDL_Rect::w
int w
Definition: SDL_rect.h:67
DrawState
Definition: testrendercopyex.c:27
SDLTest_CommonState
Definition: SDL_test_common.h:51
SDLTest_CommonState::renderers
SDL_Renderer ** renderers
Definition: SDL_test_common.h:84
i
return Display return Display Bool Bool int int int return Display XEvent Bool(*) XPointer return Display return Display Drawable _Xconst char unsigned int unsigned int return Display Pixmap Pixmap XColor XColor unsigned int unsigned int return Display _Xconst char char int char return Display Visual unsigned int int int char unsigned int unsigned int in i)
Definition: SDL_x11sym.h:42
SDL_LogSetPriority
#define SDL_LogSetPriority
Definition: SDL_dynapi_overrides.h:242
main
int main(int argc, char *argv[])
Definition: testscale.c:153
NULL
#define NULL
Definition: begin_code.h:143
SDL_Surface::format
SDL_PixelFormat * format
Definition: SDL_surface.h:72
quit
static void quit(int rc)
Definition: testscale.c:43
SDL_Rect::h
int h
Definition: SDL_rect.h:67
sprite
static SDL_Texture * sprite
Definition: testspriteminimal.c:29
SDL_Window
The type used to identify a window.
Definition: SDL_sysvideo.h:71
viewport
SDL_Rect viewport
Definition: testviewport.c:28
SDL_FALSE
Definition: SDL_stdinc.h:128
DrawState::sprite
SDL_Texture * sprite
Definition: testrendercopyex.c:31
Uint16
uint16_t Uint16
An unsigned 16-bit integer type.
Definition: SDL_stdinc.h:147
done
int done
Definition: testscale.c:39
SDL_Event
General event structure.
Definition: SDL_events.h:521
SDL_PixelFormat::palette
SDL_Palette * palette
Definition: SDL_pixels.h:302
DrawState::background
SDL_Texture * background
Definition: testrendercopyex.c:30
SDL_stack_free
#define SDL_stack_free(data)
Definition: SDL_stdinc.h:327
SDL_LOG_CATEGORY_APPLICATION
Definition: SDL_log.h:66
SDL_Rect::y
int y
Definition: SDL_rect.h:66
SDLTest_CommonQuit
void SDLTest_CommonQuit(SDLTest_CommonState *state)
Close test window.
Definition: SDL_test_common.c:1560
SDL_INIT_VIDEO
#define SDL_INIT_VIDEO
Definition: SDL.h:77
SDL_Rect
A rectangle, with the origin at the upper left.
Definition: SDL_rect.h:64
SDL_RenderPresent
#define SDL_RenderPresent
Definition: SDL_dynapi_overrides.h:352