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authorJeff Gilbert <jgilbert@mozilla.com>2013-04-25 17:42:53 -0700
committerAlon Zakai <alonzakai@gmail.com>2013-05-20 10:48:40 -0700
commit6210052164cc0f255b45050e08df56e57819a093 (patch)
tree3c314dbb9e9949cb595e8bd3df180c75b1ba2b6c /tests/sdl_fog_linear.c
parent6346adec3b5f59415d9eb9650eeefd4120f32763 (diff)
Adding texEnv emulation to Immediate mode.
Diffstat (limited to 'tests/sdl_fog_linear.c')
-rw-r--r--tests/sdl_fog_linear.c48
1 files changed, 22 insertions, 26 deletions
diff --git a/tests/sdl_fog_linear.c b/tests/sdl_fog_linear.c
index 8fc18b7c..f0805650 100644
--- a/tests/sdl_fog_linear.c
+++ b/tests/sdl_fog_linear.c
@@ -47,14 +47,12 @@ int main(int argc, char *argv[])
printf("Unable to set video mode: %s\n", SDL_GetError());
return 1;
}
-
+
// Set the OpenGL state after creating the context with SDL_SetVideoMode
glClearColor( 0, 0, 0, 0 );
-
-#if !EMSCRIPTEN
- glEnable( GL_TEXTURE_2D ); // Need this to display a texture XXX unnecessary in OpenGL ES 2.0/WebGL
-#endif
+
+ glEnable( GL_TEXTURE_2D ); // Needed when we're using the fixed-function pipeline.
glViewport( 0, 0, 640, 480 );
@@ -63,33 +61,33 @@ int main(int argc, char *argv[])
glLoadIdentity();
glOrtho( 0, 640, 480, 0, -1000, 1000 );
-
+
glMatrixMode( GL_MODELVIEW );
glLoadIdentity();
-
+
// Load the OpenGL texture
GLuint texture; // Texture object handle
SDL_Surface *surface; // Gives us the information to make the texture
-
- if ( (surface = IMG_Load("screenshot.png")) ) {
-
+
+ if ( (surface = IMG_Load("screenshot.png")) ) {
+
// Check that the image's width is a power of 2
if ( (surface->w & (surface->w - 1)) != 0 ) {
printf("warning: image.bmp's width is not a power of 2\n");
}
-
+
// Also check if the height is a power of 2
if ( (surface->h & (surface->h - 1)) != 0 ) {
printf("warning: image.bmp's height is not a power of 2\n");
}
-
+
// Have OpenGL generate a texture object handle for us
glGenTextures( 1, &texture );
-
+
// Bind the texture object
glBindTexture( GL_TEXTURE_2D, texture );
-
+
// Set the texture's stretching properties
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
@@ -100,25 +98,25 @@ int main(int argc, char *argv[])
memset(surface->pixels, 0x66, surface->w*surface->h);
// Edit the texture object's image data using the information SDL_Surface gives us
- glTexImage2D( GL_TEXTURE_2D, 0, GL_RGBA, surface->w, surface->h, 0,
+ glTexImage2D( GL_TEXTURE_2D, 0, GL_RGBA, surface->w, surface->h, 0,
GL_RGBA, GL_UNSIGNED_BYTE, surface->pixels );
//SDL_UnlockSurface(surface);
- }
+ }
else {
printf("SDL could not load image.bmp: %s\n", SDL_GetError());
SDL_Quit();
return 1;
- }
-
+ }
+
// Free the SDL_Surface only if it was successfully created
- if ( surface ) {
+ if ( surface ) {
SDL_FreeSurface( surface );
}
-
+
// Clear the screen before drawing
glClear( GL_COLOR_BUFFER_BIT );
-
+
// Bind the texture to which subsequent calls refer to
glBindTexture( GL_TEXTURE_2D, texture );
@@ -150,9 +148,7 @@ int main(int argc, char *argv[])
glTexCoord2i( 0, 1 ); glVertex3f( 500, 410, 1 );
glEnd();
-#if !EMSCRIPTEN
glDisable(GL_TEXTURE_2D);
-#endif
glColor3ub(90, 255, 255);
glBegin( GL_QUADS );
@@ -170,7 +166,7 @@ int main(int argc, char *argv[])
glEnd();
SDL_GL_SwapBuffers();
-
+
#if !EMSCRIPTEN
// Wait for 3 seconds to give us a chance to see the image
SDL_Delay(30000);
@@ -178,8 +174,8 @@ int main(int argc, char *argv[])
// Now we can delete the OpenGL texture and close down SDL
glDeleteTextures( 1, &texture );
-
+
SDL_Quit();
-
+
return 0;
}