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

Go to the source code of this file.

Functions

static void quit (int rc)
 
void DrawOnViewport (SDL_Renderer *renderer, SDL_Rect viewport)
 
void loop ()
 
int main (int argc, char *argv[])
 

Variables

static SDLTest_CommonStatestate
 
SDL_Rect viewport
 
int done
 
int j
 
SDL_bool use_target = SDL_FALSE
 

Function Documentation

◆ DrawOnViewport()

void DrawOnViewport ( SDL_Renderer renderer,
SDL_Rect  viewport 
)

Definition at line 44 of file testviewport.c.

45{
47
48 /* Set the viewport */
50
51 /* Draw a gray background */
52 SDL_SetRenderDrawColor(renderer, 0x80, 0x80, 0x80, 0xFF);
54
55 /* Test inside points */
56 SDL_SetRenderDrawColor(renderer, 0xFF, 0xFF, 0xF, 0xFF);
61
62 /* Test horizontal and vertical lines */
63 SDL_SetRenderDrawColor(renderer, 0x00, 0xFF, 0x00, 0xFF);
68
69 /* Test diagonal lines */
70 SDL_SetRenderDrawColor(renderer, 0x00, 0x00, 0xFF, 0xFF);
72 viewport.w-1, viewport.h-1);
74 0, viewport.h-1);
75
76 /* Test outside points */
77 SDL_SetRenderDrawColor(renderer, 0xFF, 0xFF, 0xF, 0xFF);
82
83 /* Add a box at the top */
84 rect.w = 8;
85 rect.h = 8;
86 rect.x = (viewport.w - rect.w) / 2;
87 rect.y = 0;
89}
#define SDL_RenderFillRect
#define SDL_SetRenderDrawColor
#define SDL_RenderDrawLine
#define SDL_RenderDrawPoint
#define SDL_RenderClear
#define SDL_RenderSetViewport
A rectangle, with the origin at the upper left (integer).
Definition: SDL_rect.h:78
int h
Definition: SDL_rect.h:80
int w
Definition: SDL_rect.h:80
int y
Definition: SDL_rect.h:79
int x
Definition: SDL_rect.h:79
static SDL_Renderer * renderer
SDL_Rect rect
Definition: testrelative.c:27
SDL_Rect viewport
Definition: testviewport.c:28

References SDL_Rect::h, rect, renderer, SDL_RenderClear, SDL_RenderDrawLine, SDL_RenderDrawPoint, SDL_RenderFillRect, SDL_RenderSetViewport, SDL_SetRenderDrawColor, viewport, SDL_Rect::w, SDL_Rect::x, and SDL_Rect::y.

Referenced by loop().

◆ loop()

void loop ( void  )

Definition at line 92 of file testviewport.c.

93{
94#ifdef __EMSCRIPTEN__
95 /* Avoid using delays */
96 if(SDL_GetTicks() - wait_start < 1000)
97 return;
98 wait_start = SDL_GetTicks();
99#endif
101 int i;
102 /* Check for events */
103 while (SDL_PollEvent(&event)) {
105 }
106
107 /* Move a viewport box in steps around the screen */
108 viewport.x = j * 100;
110 viewport.w = 100 + j * 50;
111 viewport.h = 100 + j * 50;
112 j = (j + 1) % 4;
113 SDL_Log("Current Viewport x=%i y=%i w=%i h=%i", viewport.x, viewport.y, viewport.w, viewport.h);
114
115 for (i = 0; i < state->num_windows; ++i) {
116 if (state->windows[i] == NULL)
117 continue;
118
119 /* Draw using viewport */
121
122 /* Update the screen! */
123 if (use_target) {
128 } else {
130 }
131 }
132
133#ifdef __EMSCRIPTEN__
134 if (done) {
135 emscripten_cancel_main_loop();
136 }
137#endif
138}
#define SDL_RenderPresent
#define SDL_PollEvent
#define SDL_SetRenderTarget
#define SDL_RenderCopy
#define SDL_Log
struct _cl_event * event
void SDLTest_CommonEvent(SDLTest_CommonState *state, SDL_Event *event, int *done)
Common event handler for test windows.
Uint32 SDL_GetTicks(void)
Get the number of milliseconds since the SDL library initialization.
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
#define NULL
Definition: begin_code.h:167
SDL_Window ** windows
SDL_Texture ** targets
SDL_Renderer ** renderers
int j
Definition: testviewport.c:29
SDL_bool use_target
Definition: testviewport.c:30
int done
Definition: testviewport.c:29
void DrawOnViewport(SDL_Renderer *renderer, SDL_Rect viewport)
Definition: testviewport.c:44
static SDLTest_CommonState * state
Definition: testviewport.c:26
General event structure.
Definition: SDL_events.h:558

References done, DrawOnViewport(), SDL_Rect::h, i, j, NULL, SDLTest_CommonState::num_windows, SDLTest_CommonState::renderers, SDL_GetTicks(), SDL_Log, SDL_PollEvent, SDL_RenderCopy, SDL_RenderPresent, SDL_SetRenderTarget, SDLTest_CommonEvent(), state, SDLTest_CommonState::targets, use_target, viewport, SDL_Rect::w, SDLTest_CommonState::windows, SDL_Rect::x, and SDL_Rect::y.

Referenced by main().

◆ main()

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

Definition at line 141 of file testviewport.c.

142{
143 int i;
144 Uint32 then, now, frames;
145
146 /* Initialize test framework */
148 if (!state) {
149 return 1;
150 }
151
152 for (i = 1; i < argc;) {
153 int consumed;
154
155 consumed = SDLTest_CommonArg(state, i);
156 if (consumed == 0) {
157 consumed = -1;
158 if (SDL_strcasecmp(argv[i], "--target") == 0) {
160 consumed = 1;
161 }
162 }
163 if (consumed < 0) {
164 static const char *options[] = { "[--target]", NULL };
165 SDLTest_CommonLogUsage(state, argv[0], options);
166 quit(1);
167 }
168 i += consumed;
169 }
171 quit(2);
172 }
173
174 if (use_target) {
175 int w, h;
176
177 for (i = 0; i < state->num_windows; ++i) {
181 }
182 }
183
184 for (i = 0; i < state->num_windows; ++i) {
186 SDL_SetRenderDrawColor(renderer, 0xA0, 0xA0, 0xA0, 0xFF);
188 }
189
190 /* Main render loop */
191 frames = 0;
192 then = SDL_GetTicks();
193 done = 0;
194 j = 0;
195
196#ifdef __EMSCRIPTEN__
197 wait_start = SDL_GetTicks();
198 emscripten_set_main_loop(loop, 0, 1);
199#else
200 while (!done) {
201 ++frames;
202 loop();
203 SDL_Delay(1000);
204 }
205#endif
206
207 /* Print out some timing information */
208 now = SDL_GetTicks();
209 if (now > then) {
210 double fps = ((double) frames * 1000) / (now - then);
211 SDL_Log("%2.2f frames per second\n", fps);
212 }
213 quit(0);
214 return 0;
215}
#define SDL_INIT_VIDEO
Definition: SDL.h:79
#define SDL_GetWindowSize
#define SDL_CreateTexture
#define SDL_strcasecmp
#define SDL_Delay
GLfloat GLfloat GLfloat GLfloat h
GLubyte GLubyte GLubyte GLubyte w
@ SDL_PIXELFORMAT_RGBA8888
Definition: SDL_pixels.h:251
@ SDL_TEXTUREACCESS_TARGET
Definition: SDL_render.h:95
@ SDL_TRUE
Definition: SDL_stdinc.h:164
uint32_t Uint32
Definition: SDL_stdinc.h:203
SDLTest_CommonState * SDLTest_CommonCreateState(char **argv, Uint32 flags)
Parse command line parameters and create common state.
int SDLTest_CommonArg(SDLTest_CommonState *state, int index)
Process one common argument.
SDL_bool SDLTest_CommonInit(SDLTest_CommonState *state)
Open test window.
void SDLTest_CommonLogUsage(SDLTest_CommonState *state, const char *argv0, const char **options)
Logs command line usage info.
static Uint32 frames
Definition: testsprite2.c:40
static void quit(int rc)
Definition: testviewport.c:37
void loop()
Definition: testviewport.c:92

References done, frames, i, j, loop(), NULL, SDLTest_CommonState::num_windows, quit(), renderer, SDLTest_CommonState::renderers, SDL_CreateTexture, SDL_Delay, SDL_GetTicks(), SDL_GetWindowSize, SDL_INIT_VIDEO, SDL_Log, SDL_PIXELFORMAT_RGBA8888, SDL_RenderClear, SDL_SetRenderDrawColor, SDL_SetRenderTarget, SDL_strcasecmp, SDL_TEXTUREACCESS_TARGET, SDL_TRUE, SDLTest_CommonArg(), SDLTest_CommonCreateState(), SDLTest_CommonInit(), SDLTest_CommonLogUsage(), state, SDLTest_CommonState::targets, use_target, and SDLTest_CommonState::windows.

◆ quit()

static void quit ( int  rc)
static

Definition at line 37 of file testviewport.c.

38{
40 exit(rc);
41}
void SDLTest_CommonQuit(SDLTest_CommonState *state)
Close test window.

References SDLTest_CommonQuit(), and state.

Referenced by main().

Variable Documentation

◆ done

int done

Definition at line 29 of file testviewport.c.

Referenced by loop(), and main().

◆ j

int j

Definition at line 29 of file testviewport.c.

Referenced by loop(), and main().

◆ state

SDLTest_CommonState* state
static

Definition at line 26 of file testviewport.c.

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

◆ use_target

SDL_bool use_target = SDL_FALSE

Definition at line 30 of file testviewport.c.

Referenced by loop(), and main().

◆ viewport