SDL  2.0
testrendercopyex.c File Reference
#include <stdlib.h>
#include <stdio.h>
#include <time.h>
#include "SDL_test_common.h"
+ Include dependency graph for testrendercopyex.c:

Go to the source code of this file.

Data Structures

struct  DrawState
 

Functions

static void quit (int rc)
 
SDL_TextureLoadTexture (SDL_Renderer *renderer, const char *file, SDL_bool transparent)
 
void Draw (DrawState *s)
 
void loop ()
 
int main (int argc, char *argv[])
 

Variables

static SDLTest_CommonStatestate
 
DrawStatedrawstates
 
int done
 

Function Documentation

◆ Draw()

void Draw ( DrawState s)

Definition at line 98 of file testrendercopyex.c.

99 {
102  SDL_Point *center=NULL;
103  SDL_Point origin = {0,0};
104 
105  SDL_RenderGetViewport(s->renderer, &viewport);
106 
108  SDL_SetRenderTarget(s->renderer, target);
109 
110  /* Draw the background */
111  SDL_RenderCopy(s->renderer, s->background, NULL, NULL);
112 
113  /* Scale and draw the sprite */
114  s->sprite_rect.w += s->scale_direction;
115  s->sprite_rect.h += s->scale_direction;
116  if (s->scale_direction > 0) {
117  center = &origin;
118  if (s->sprite_rect.w >= viewport.w || s->sprite_rect.h >= viewport.h) {
119  s->scale_direction = -1;
120  }
121  } else {
122  if (s->sprite_rect.w <= 1 || s->sprite_rect.h <= 1) {
123  s->scale_direction = 1;
124  }
125  }
126  s->sprite_rect.x = (viewport.w - s->sprite_rect.w) / 2;
127  s->sprite_rect.y = (viewport.h - s->sprite_rect.h) / 2;
128 
129  SDL_RenderCopyEx(s->renderer, s->sprite, NULL, &s->sprite_rect, (double)s->sprite_rect.w, center, (SDL_RendererFlip)s->scale_direction);
130 
131  SDL_SetRenderTarget(s->renderer, NULL);
132  SDL_RenderCopy(s->renderer, target, NULL, NULL);
134 
135  /* Update the screen! */
136  SDL_RenderPresent(s->renderer);
137  /* SDL_Delay(10); */
138 }

References SDL_Rect::h, NULL, SDL_CreateTexture, SDL_DestroyTexture, SDL_PIXELFORMAT_ARGB8888, SDL_RenderCopy, SDL_RenderCopyEx, SDL_RenderGetViewport, SDL_RenderPresent, SDL_SetRenderTarget, SDL_TEXTUREACCESS_TARGET, viewport, SDL_Rect::w, and SDL_Point::x.

Referenced by loop().

◆ LoadTexture()

SDL_Texture* LoadTexture ( SDL_Renderer renderer,
const char *  file,
SDL_bool  transparent 
)

Definition at line 48 of file testrendercopyex.c.

49 {
50  SDL_Surface *temp;
52 
53  /* Load the sprite image */
54  temp = SDL_LoadBMP(file);
55  if (temp == NULL) {
56  SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't load %s: %s", file, SDL_GetError());
57  return NULL;
58  }
59 
60  /* Set transparent pixel as the pixel at (0,0) */
61  if (transparent) {
62  if (temp->format->palette) {
63  SDL_SetColorKey(temp, SDL_TRUE, *(Uint8 *) temp->pixels);
64  } else {
65  switch (temp->format->BitsPerPixel) {
66  case 15:
68  (*(Uint16 *) temp->pixels) & 0x00007FFF);
69  break;
70  case 16:
71  SDL_SetColorKey(temp, SDL_TRUE, *(Uint16 *) temp->pixels);
72  break;
73  case 24:
75  (*(Uint32 *) temp->pixels) & 0x00FFFFFF);
76  break;
77  case 32:
78  SDL_SetColorKey(temp, SDL_TRUE, *(Uint32 *) temp->pixels);
79  break;
80  }
81  }
82  }
83 
84  /* Create textures from the image */
86  if (!texture) {
87  SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't create texture: %s\n", SDL_GetError());
88  SDL_FreeSurface(temp);
89  return NULL;
90  }
91  SDL_FreeSurface(temp);
92 
93  /* We're ready to roll. :) */
94  return texture;
95 }

References SDL_PixelFormat::BitsPerPixel, SDL_Surface::format, NULL, SDL_PixelFormat::palette, SDL_Surface::pixels, renderer, SDL_CreateTextureFromSurface, SDL_FreeSurface, SDL_GetError, SDL_LoadBMP, SDL_LOG_CATEGORY_APPLICATION, SDL_LogError, SDL_SetColorKey, and SDL_TRUE.

Referenced by main().

◆ loop()

void loop ( )

Definition at line 140 of file testrendercopyex.c.

141 {
142  int i;
144 
145  /* Check for events */
146 
147  while (SDL_PollEvent(&event)) {
149  }
150  for (i = 0; i < state->num_windows; ++i) {
151  if (state->windows[i] == NULL)
152  continue;
153  Draw(&drawstates[i]);
154  }
155 #ifdef __EMSCRIPTEN__
156  if (done) {
157  emscripten_cancel_main_loop();
158  }
159 #endif
160 }

References done, Draw(), drawstates, i, NULL, SDLTest_CommonState::num_windows, SDL_PollEvent, SDLTest_CommonEvent(), state, and SDLTest_CommonState::windows.

Referenced by main().

◆ main()

int main ( int  argc,
char *  argv[] 
)

Definition at line 163 of file testrendercopyex.c.

164 {
165  int i;
166  int frames;
167  Uint32 then, now;
168 
169  /* Enable standard application logging */
171 
172  /* Initialize test framework */
174  if (!state) {
175  return 1;
176  }
177 
178  if (!SDLTest_CommonDefaultArgs(state, argc, argv) || !SDLTest_CommonInit(state)) {
180  return 1;
181  }
182 
184  for (i = 0; i < state->num_windows; ++i) {
185  DrawState *drawstate = &drawstates[i];
186 
187  drawstate->window = state->windows[i];
188  drawstate->renderer = state->renderers[i];
189  drawstate->sprite = LoadTexture(drawstate->renderer, "icon.bmp", SDL_TRUE);
190  drawstate->background = LoadTexture(drawstate->renderer, "sample.bmp", SDL_FALSE);
191  if (!drawstate->sprite || !drawstate->background) {
192  quit(2);
193  }
194  SDL_QueryTexture(drawstate->sprite, NULL, NULL,
195  &drawstate->sprite_rect.w, &drawstate->sprite_rect.h);
196  drawstate->scale_direction = 1;
197  }
198 
199  /* Main render loop */
200  frames = 0;
201  then = SDL_GetTicks();
202  done = 0;
203 
204 #ifdef __EMSCRIPTEN__
205  emscripten_set_main_loop(loop, 0, 1);
206 #else
207  while (!done) {
208  ++frames;
209  loop();
210  }
211 #endif
212  /* Print out some timing information */
213  now = SDL_GetTicks();
214  if (now > then) {
215  double fps = ((double) frames * 1000) / (now - then);
216  SDL_Log("%2.2f frames per second\n", fps);
217  }
218 
220 
221  quit(0);
222  return 0;
223 }

References DrawState::background, done, drawstates, frames, SDL_Rect::h, i, LoadTexture(), loop(), NULL, SDLTest_CommonState::num_windows, quit(), DrawState::renderer, SDLTest_CommonState::renderers, DrawState::scale_direction, SDL_FALSE, SDL_GetTicks(), SDL_INIT_VIDEO, SDL_Log, SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO, SDL_LogSetPriority, SDL_QueryTexture, SDL_stack_alloc, SDL_stack_free, SDL_TRUE, SDLTest_CommonCreateState(), SDLTest_CommonDefaultArgs(), SDLTest_CommonInit(), SDLTest_CommonQuit(), DrawState::sprite, DrawState::sprite_rect, state, SDL_Rect::w, DrawState::window, and SDLTest_CommonState::windows.

◆ quit()

static void quit ( int  rc)
static

Definition at line 41 of file testrendercopyex.c.

42 {
44  exit(rc);
45 }

References SDLTest_CommonQuit(), and state.

Referenced by main().

Variable Documentation

◆ done

int done

Definition at line 37 of file testrendercopyex.c.

Referenced by loop(), and main().

◆ drawstates

DrawState* drawstates

Definition at line 36 of file testrendercopyex.c.

Referenced by loop(), and main().

◆ state

SDLTest_CommonState* state
static

Definition at line 25 of file testrendercopyex.c.

Referenced by loop(), main(), and quit().

Uint8
uint8_t Uint8
Definition: SDL_stdinc.h:179
SDL_Point::x
int x
Definition: SDL_rect.h:50
SDLTest_CommonState::windows
SDL_Window ** windows
Definition: SDL_test_common.h:78
DrawState
Definition: testrendercopyex.c:27
SDL_GetError
#define SDL_GetError
Definition: SDL_dynapi_overrides.h:113
SDL_RenderPresent
#define SDL_RenderPresent
Definition: SDL_dynapi_overrides.h:346
SDL_SetRenderTarget
#define SDL_SetRenderTarget
Definition: SDL_dynapi_overrides.h:320
SDL_PixelFormat::BitsPerPixel
Uint8 BitsPerPixel
Definition: SDL_pixels.h:322
DrawState::window
SDL_Window * window
Definition: testrendercopyex.c:28
target
GLenum target
Definition: SDL_opengl_glext.h:1554
Uint16
uint16_t Uint16
Definition: SDL_stdinc.h:191
SDL_Surface
A collection of pixels used in software blitting.
Definition: SDL_surface.h:71
SDL_PollEvent
#define SDL_PollEvent
Definition: SDL_dynapi_overrides.h:122
DrawState::background
SDL_Texture * background
Definition: testrendercopyex.c:30
NULL
#define NULL
Definition: begin_code.h:167
SDL_Surface::pixels
void * pixels
Definition: SDL_surface.h:76
loop
void loop()
Definition: testrendercopyex.c:140
DrawState::sprite_rect
SDL_Rect sprite_rect
Definition: testrendercopyex.c:32
viewport
static SDL_Rect viewport
Definition: testviewport.c:28
Uint32
uint32_t Uint32
Definition: SDL_stdinc.h:203
SDLTest_CommonState::renderers
SDL_Renderer ** renderers
Definition: SDL_test_common.h:84
done
int done
Definition: testrendercopyex.c:37
SDL_LogError
#define SDL_LogError
Definition: SDL_dynapi_overrides.h:36
SDL_Rect::w
int w
Definition: SDL_rect.h:80
SDLTest_CommonCreateState
SDLTest_CommonState * SDLTest_CommonCreateState(char **argv, Uint32 flags)
Parse command line parameters and create common state.
Definition: SDL_test_common.c:59
SDL_stack_alloc
#define SDL_stack_alloc(type, count)
Definition: SDL_stdinc.h:354
SDLTest_CommonQuit
void SDLTest_CommonQuit(SDLTest_CommonState *state)
Close test window.
Definition: SDL_test_common.c:1910
SDL_CreateTextureFromSurface
#define SDL_CreateTextureFromSurface
Definition: SDL_dynapi_overrides.h:307
SDLTest_CommonState::num_windows
int num_windows
Definition: SDL_test_common.h:77
event
struct _cl_event * event
Definition: SDL_opengl_glext.h:2652
SDLTest_CommonDefaultArgs
SDL_bool SDLTest_CommonDefaultArgs(SDLTest_CommonState *state, const int argc, char **argv)
Easy argument handling when test app doesn't need any custom args.
Definition: SDL_test_common.c:584
SDL_RenderCopy
#define SDL_RenderCopy
Definition: SDL_dynapi_overrides.h:343
drawstates
DrawState * drawstates
Definition: testrendercopyex.c:36
SDL_Log
#define SDL_Log
Definition: SDL_dynapi_overrides.h:31
SDL_Rect::h
int h
Definition: SDL_rect.h:80
SDL_LOG_CATEGORY_APPLICATION
@ SDL_LOG_CATEGORY_APPLICATION
Definition: SDL_log.h:66
SDL_RenderGetViewport
#define SDL_RenderGetViewport
Definition: SDL_dynapi_overrides.h:325
SDL_QueryTexture
#define SDL_QueryTexture
Definition: SDL_dynapi_overrides.h:308
SDL_FreeSurface
#define SDL_FreeSurface
Definition: SDL_dynapi_overrides.h:446
SDL_PixelFormat::palette
SDL_Palette * palette
Definition: SDL_pixels.h:321
SDL_SetColorKey
#define SDL_SetColorKey
Definition: SDL_dynapi_overrides.h:453
SDL_GetTicks
Uint32 SDL_GetTicks(void)
Get the number of milliseconds since the SDL library initialization.
DrawState::renderer
SDL_Renderer * renderer
Definition: testrendercopyex.c:29
SDL_TRUE
@ SDL_TRUE
Definition: SDL_stdinc.h:164
SDL_PIXELFORMAT_ARGB8888
@ SDL_PIXELFORMAT_ARGB8888
Definition: SDL_pixels.h:251
SDL_LoadBMP
#define SDL_LoadBMP(file)
Definition: SDL_surface.h:201
SDL_DestroyTexture
#define SDL_DestroyTexture
Definition: SDL_dynapi_overrides.h:347
SDLTest_CommonInit
SDL_bool SDLTest_CommonInit(SDLTest_CommonState *state)
Open test window.
Definition: SDL_test_common.c:835
SDL_INIT_VIDEO
#define SDL_INIT_VIDEO
Definition: SDL.h:80
SDL_LOG_PRIORITY_INFO
@ SDL_LOG_PRIORITY_INFO
Definition: SDL_log.h:106
DrawState::scale_direction
int scale_direction
Definition: testrendercopyex.c:33
renderer
static SDL_Renderer * renderer
Definition: testaudiocapture.c:21
frames
static Uint32 frames
Definition: testsprite2.c:40
state
static SDLTest_CommonState * state
Definition: testrendercopyex.c:25
SDL_stack_free
#define SDL_stack_free(data)
Definition: SDL_stdinc.h:355
SDL_RenderCopyEx
#define SDL_RenderCopyEx
Definition: SDL_dynapi_overrides.h:344
SDL_Point
The structure that defines a point (integer)
Definition: SDL_rect.h:49
SDL_LogSetPriority
#define SDL_LogSetPriority
Definition: SDL_dynapi_overrides.h:236
LoadTexture
SDL_Texture * LoadTexture(SDL_Renderer *renderer, const char *file, SDL_bool transparent)
Definition: testrendercopyex.c:48
s
GLdouble s
Definition: SDL_opengl.h:2063
SDL_Rect
A rectangle, with the origin at the upper left (integer).
Definition: SDL_rect.h:78
SDL_Texture
Definition: SDL_sysrender.h:37
SDL_RendererFlip
SDL_RendererFlip
Flip constants for SDL_RenderCopyEx.
Definition: SDL_render.h:122
SDL_TEXTUREACCESS_TARGET
@ SDL_TEXTUREACCESS_TARGET
Definition: SDL_render.h:105
Draw
void Draw(DrawState *s)
Definition: testrendercopyex.c:98
SDL_Event
General event structure.
Definition: SDL_events.h:559
SDL_FALSE
@ SDL_FALSE
Definition: SDL_stdinc.h:163
SDLTest_CommonEvent
void SDLTest_CommonEvent(SDLTest_CommonState *state, SDL_Event *event, int *done)
Common event handler for test windows.
Definition: SDL_test_common.c:1579
DrawState::sprite
SDL_Texture * sprite
Definition: testrendercopyex.c:31
texture
GLenum GLenum GLuint texture
Definition: SDL_opengl_glext.h:1181
SDL_Surface::format
SDL_PixelFormat * format
Definition: SDL_surface.h:73
SDL_CreateTexture
#define SDL_CreateTexture
Definition: SDL_dynapi_overrides.h:306
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:50
quit
static void quit(int rc)
Definition: testrendercopyex.c:41