diff options
Diffstat (limited to 'tests')
| -rw-r--r-- | tests/gl_stride.c | 152 | ||||
| -rw-r--r-- | tests/gl_stride.png | bin | 0 -> 345620 bytes | |||
| -rwxr-xr-x | tests/runner.py | 3 |
3 files changed, 155 insertions, 0 deletions
diff --git a/tests/gl_stride.c b/tests/gl_stride.c new file mode 100644 index 00000000..c254ad5a --- /dev/null +++ b/tests/gl_stride.c @@ -0,0 +1,152 @@ +/******************************************************************* + * * + * Using SDL With OpenGL * + * * + * Tutorial by Kyle Foley (sdw) * + * * + * http://gpwiki.org/index.php/SDL:Tutorials:Using_SDL_with_OpenGL * + * * + *******************************************************************/ + +/* +THIS WORK, INCLUDING THE SOURCE CODE, DOCUMENTATION +AND RELATED MEDIA AND DATA, IS PLACED INTO THE PUBLIC DOMAIN. + +THE ORIGINAL AUTHOR IS KYLE FOLEY. + +THIS SOFTWARE IS PROVIDED AS-IS WITHOUT WARRANTY +OF ANY KIND, NOT EVEN THE IMPLIED WARRANTY OF +MERCHANTABILITY. THE AUTHOR OF THIS SOFTWARE, +ASSUMES _NO_ RESPONSIBILITY FOR ANY CONSEQUENCE +RESULTING FROM THE USE, MODIFICATION, OR +REDISTRIBUTION OF THIS SOFTWARE. +*/ + +#if !EMSCRIPTEN +#define USE_GLEW 0 +#endif + +#if USE_GLEW +#include "GL/glew.h" +#endif + +#include "SDL/SDL.h" +#include "SDL/SDL_image.h" +#if !USE_GLEW +#include "SDL/SDL_opengl.h" +#endif + +#include <stdio.h> +#include <string.h> +#include <assert.h> + +int main(int argc, char *argv[]) +{ + SDL_Surface *screen; + + // Slightly different SDL initialization + if ( SDL_Init(SDL_INIT_VIDEO) != 0 ) { + printf("Unable to initialize SDL: %s\n", SDL_GetError()); + return 1; + } + + SDL_GL_SetAttribute( SDL_GL_DOUBLEBUFFER, 1 ); // *new* + + screen = SDL_SetVideoMode( 640, 480, 16, SDL_OPENGL ); // *changed* + if ( !screen ) { + 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 + + glViewport( 0, 0, 640, 480 ); + + glMatrixMode( GL_MODELVIEW ); + glLoadIdentity(); + + // Clear the screen before drawing + glClear( GL_COLOR_BUFFER_BIT ); + + typedef struct Vertex { + GLfloat x; + GLfloat y; + } Vertex; + + typedef struct Color { + GLubyte r; + GLubyte g; + GLubyte b; + GLubyte a; + } Color; + + Vertex vertices[3] = { + {-1.0, 0.0}, + { 0.0, 1.0}, + { 1.0, 0.0} + }; + + Color colors[3] = { + {0xFF, 0x00, 0x00, 0xFF}, + {0x00, 0xFF, 0x00, 0xFF}, + {0x00, 0x00, 0xFF, 0xFF} + }; + + Vertex vertices2[3] = { + {-1.0, 0.0}, + { 1.0, 0.0}, + { 0.0, -1.0} + }; + + Color colors2[3] = { + {0xFF, 0x00, 0x00, 0xFF}, + {0x00, 0x00, 0xFF, 0xFF}, + {0x00, 0xFF, 0x00, 0xFF} + }; + + // DRAW + + // Clear the screen before drawing + glClear( GL_COLOR_BUFFER_BIT ); + + // This test ensures that we can use two separate arrays in memory for different + // attributes, and that they each can have different stride. + // The first test shows implicit striding (the zero indicates tightly packed) + // The second test shows explicit striding where the stride is passed in + // even though it also is tightly packed + + glEnableClientState(GL_VERTEX_ARRAY); + glEnableClientState(GL_COLOR_ARRAY); + + // TEST 1 + + glVertexPointer(2, GL_FLOAT, 0, vertices); + glColorPointer(4, GL_UNSIGNED_BYTE, 0, colors); + glDrawArrays(GL_TRIANGLE_STRIP, 0, 3); + + // TEST 2 + + glVertexPointer(2, GL_FLOAT, 8, vertices2); + glColorPointer(4, GL_UNSIGNED_BYTE, 4, colors2); + glDrawArrays(GL_TRIANGLE_STRIP, 0, 3); + + glDisableClientState(GL_COLOR_ARRAY); + glDisableClientState(GL_VERTEX_ARRAY); + + SDL_GL_SwapBuffers(); + +#if !EMSCRIPTEN + // Wait for 3 seconds to give us a chance to see the image + SDL_Delay(3000); +#endif + + SDL_Quit(); + + return 0; +} diff --git a/tests/gl_stride.png b/tests/gl_stride.png Binary files differnew file mode 100644 index 00000000..db1bc751 --- /dev/null +++ b/tests/gl_stride.png diff --git a/tests/runner.py b/tests/runner.py index 507e5041..7619e85f 100755 --- a/tests/runner.py +++ b/tests/runner.py @@ -11588,6 +11588,9 @@ elif 'browser' in str(sys.argv): def test_gl_renderers(self): self.btest('gl_renderers.c', reference='gl_renderers.png', args=['-s', 'GL_UNSAFE_OPTS=0']) + def test_gl_stride(self): + self.btest('gl_stride.c', reference='gl_stride.png', args=['-s', 'GL_UNSAFE_OPTS=0']) + def test_matrix_identity(self): self.btest('gl_matrix_identity.c', expected=['-1882984448', '460451840']) |
