Attachment 122892 Details for Bug 94917 – Program which test for the issue

Program which test for the issue

ssbo_limit.cc (text/plain), 1.24 KB, created by James Legg on 2016-04-13 10:38:04 UTC

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Creator: James Legg

Created: 2016-04-13 10:38:04 UTC

Size: 1.24 KB

patch

obsolete

>// Compile with c++ $(pkg-config --cflags --libs gl sdl2) ssbo_limit.cc -o ssbo_limit
>#include <SDL.h>
>#define GL_GLEXT_PROTOTYPES 1
>#include <GL/gl.h>
>#include <cassert>
>#include <cstring>
>
>int main()
>{
>	SDL_Init(SDL_INIT_VIDEO);
>	SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
>	SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 3);
>	SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK,
>	                    SDL_GL_CONTEXT_PROFILE_CORE);
>	const Uint32 window_flags = SDL_WINDOW_OPENGL | SDL_WINDOW_HIDDEN;
>	SDL_Window * window = SDL_CreateWindow("", 0, 0, 8, 8, window_flags);
>	assert(window);
>	SDL_GLContext context = SDL_GL_CreateContext(window);
>	assert(context);
>	
>	GLint extension_count;
>	glGetIntegerv(GL_NUM_EXTENSIONS, &extension_count);
>	bool has_extension = false;
>	for (GLint i = 0; i < extension_count; i++)
>	{
>		const char * const extension = reinterpret_cast<const char *>(glGetStringi(GL_EXTENSIONS, i));
>		if (std::strcmp("GL_ARB_shader_storage_buffer_object", extension) == 0)
>		{
>			has_extension = true;
>			break;
>		}
>	}
>
>	if (has_extension)
>	{
>		GLint max_blocks;
>		glGetIntegerv (GL_MAX_COMBINED_SHADER_STORAGE_BLOCKS, &max_blocks);
>		// The GL_ARB_shader_storage_buffer_object spec requires at
>		// least 8.
>		assert(max_blocks >= 8);
>	}
>}
>

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