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Test case for testing the projection matrix of target textures.

gles_projection_matrix.c (text/x-csrc), 4.37 KB, created by Simon Hug on 2016-05-28 12:11:50 UTC

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Description:

Filename:

MIME Type:

Creator: Simon Hug

Created: 2016-05-28 12:11:50 UTC

Size: 4.37 KB

patch

obsolete

>/*
>	Test case for the projection matrix of target textures. If it's not
>	correctly set up, then the image will be upside-down.
>
>	Left side of window is default framebuffer, right side is target texture.
>*/
>
>#ifdef _WIN32
>#include <SDL.h>
>#else
>#include <SDL2/SDL.h>
>#endif
>
>static const Sint32 arrow_lines[] = {
>	128,40, 168,80, 140,80, 140,160, 116,160, 116,80, 88,80, 128,40
>};
>static const Sint32 letter_U[] = {
>	90,180, 90,220, 95,230, 105,235, 110,235, 120,230, 125,220, 125,180
>};
>static const Sint32 letter_P[] = {
>	131,235, 131,180, 151,180, 161,184, 166,192, 166,196, 161,204, 151,208, 131,208
>};
>static const Uint32 arrow_texdata[] = {
>	0, 0, 0, 0,-1, 0, 0, 0,
>	0, 0, 0,-1,-1,-1, 0, 0,
>	0, 0,-1,-1,-1,-1,-1, 0,
>	0,-1,-1,-1,-1,-1,-1,-1,
>	0, 0, 0,-1,-1,-1, 0, 0,
>	0, 0, 0,-1,-1,-1, 0, 0,
>	0, 0, 0,-1,-1,-1, 0, 0,
>	0, 0, 0,-1,-1,-1, 0, 0,
>};
>
>int main(int argc, char * argv[])
>{
>	SDL_Window * window;
>	int window_width, window_height;
>	SDL_Renderer * renderer;
>	SDL_Texture * arrow_texture;
>	SDL_Texture * target_texture;
>	SDL_Event e;
>	int run = 1;
>	SDL_Rect texrect, dstrect;
>	SDL_RendererInfo rinfo;
>
>	dstrect.x = 106;
>	dstrect.y = 55;
>	dstrect.w = 40;
>	dstrect.h = 40;
>
>	SDL_SetHint(SDL_HINT_RENDER_DRIVER, "opengles");
>
>	if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_EVENTS) < 0)
>	{
>		SDL_Log("Could not initialize SDL: %s\n", SDL_GetError());
>		return 1;
>	}
>
>	window = SDL_CreateWindow("OpenGL ES projection matrix for target texture test",
>		SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED,
>		640, 480, SDL_WINDOW_RESIZABLE);
>	if (window == NULL)
>	{
>		SDL_Log("Could not create window: %s\n", SDL_GetError());
>		return 1;
>	}
>
>	renderer = SDL_CreateRenderer(window, -1, 0);
>	if (renderer == NULL)
>	{
>		SDL_Log("Could not create renderer: %s\n", SDL_GetError());
>		return 1;
>	}
>
>	SDL_GetRendererInfo(renderer, &rinfo);
>	if (SDL_strcmp(rinfo.name, "opengles") != 0)
>	{
>		SDL_Log("Could not load opengles renderer.");
>	}
>
>	arrow_texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_ABGR8888, SDL_TEXTUREACCESS_STATIC, 8, 8);
>	if (arrow_texture == NULL)
>	{
>		SDL_Log("Could not create arrow texture: %s\n", SDL_GetError());
>		return 1;
>	}
>	SDL_UpdateTexture(arrow_texture, NULL, arrow_texdata, 8*4);
>	SDL_SetTextureBlendMode(arrow_texture, SDL_BLENDMODE_BLEND);
>
>	target_texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_ABGR8888, SDL_TEXTUREACCESS_TARGET, 512, 512);
>	if (target_texture == NULL)
>	{
>		SDL_Log("Could not create target texture: %s\n", SDL_GetError());
>		return 1;
>	}
>
>	while (run)
>	{
>		while(SDL_PollEvent(&e))
>		{
>			switch (e.type)
>			{
>			case SDL_QUIT:
>				run = 0;
>				break;
>			case SDL_KEYDOWN:
>				if(e.key.keysym.sym == SDLK_ESCAPE)
>					run = 0;
>				break;
>			}
>		}
>
>		SDL_GetWindowSize(window, &window_width, &window_height);
>
>		SDL_SetRenderDrawColor(renderer, 0, 0, 128, 255);
>		SDL_RenderClear(renderer);
>
>		SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255);
>		SDL_RenderDrawLines(renderer, (SDL_Point*)arrow_lines, sizeof(arrow_lines)/sizeof(Sint32)/2);
>		SDL_RenderDrawLines(renderer, (SDL_Point*)letter_U, sizeof(letter_U)/sizeof(Sint32)/2);
>		SDL_RenderDrawLines(renderer, (SDL_Point*)letter_P, sizeof(letter_P)/sizeof(Sint32)/2);
>		SDL_RenderCopyEx(renderer, arrow_texture, NULL, &dstrect, 0.01 /* Force glDrawArrays draw path. */, NULL, SDL_FLIP_NONE);
>
>		if (target_texture != NULL)
>		{
>			SDL_SetRenderTarget(renderer, target_texture);
>			SDL_SetRenderDrawColor(renderer, 0, 128, 0, 255);
>			SDL_RenderClear(renderer);
>			SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255);
>			SDL_RenderDrawLines(renderer, (SDL_Point*)arrow_lines, sizeof(arrow_lines)/sizeof(Sint32)/2);
>			SDL_RenderDrawLines(renderer, (SDL_Point*)letter_U, sizeof(letter_U)/sizeof(Sint32)/2);
>			SDL_RenderDrawLines(renderer, (SDL_Point*)letter_P, sizeof(letter_P)/sizeof(Sint32)/2);
>			SDL_RenderCopyEx(renderer, arrow_texture, NULL, &dstrect, 0.01 /* Force glDrawArrays draw path. */, NULL, SDL_FLIP_NONE);
>			SDL_SetRenderTarget(renderer, NULL);
>
>			texrect.x = window_width / 2;
>			texrect.y = 0;
>			texrect.w = 512;
>			texrect.h = 512;
>
>			SDL_RenderCopy(renderer, target_texture, NULL, &texrect);
>		}
>
>		SDL_RenderPresent(renderer);
>	}
>
>	SDL_DestroyTexture(arrow_texture);
>	SDL_DestroyTexture(target_texture);
>	SDL_DestroyRenderer(renderer);
>	SDL_DestroyWindow(window);
>	SDL_Quit();
>	return 0;
>}

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Attachments on bug 3347: 2468 | 2469

We are currently migrating Bugzilla to GitHub issues.Any changes made to the bug tracker now will be lost, so please do not post new bugs or make changes to them.When we're done, all bug URLs will redirect to their equivalent location on the new bug tracker.

We are currently migrating Bugzilla to GitHub issues.
Any changes made to the bug tracker now will be lost, so please do not post new bugs or make changes to them.
When we're done, all bug URLs will redirect to their equivalent location on the new bug tracker.