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a minimal C program that reproduces the bug

file_4149.txt (text/plain), 2.79 KB, created by SuperZazu on 2018-04-24 15:43:48 UTC

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Description:

Filename:

MIME Type:

Creator: SuperZazu

Created: 2018-04-24 15:43:48 UTC

Size: 2.79 KB

patch

obsolete

>#include <stdio.h>
>#include <stdbool.h>
>
>#include <SDL.h>
>
>#define WIN_WIDTH 160
>#define WIN_HEIGHT 144
>
>int main(int argc, char **argv) {
>    // SDL init
>    if (SDL_Init(SDL_INIT_VIDEO) != 0) {
>        SDL_Log("Unable to initialize SDL: %s", SDL_GetError());
>        return 1;
>    }
>
>    // on macOS, use metal driver if available:
>    SDL_SetHint(SDL_HINT_RENDER_DRIVER, "metal");
>    SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "0");
>
>    // create SDL window
>    SDL_Window *window = SDL_CreateWindow("sdl2_pixelbuffer",
>        SDL_WINDOWPOS_CENTERED,
>        SDL_WINDOWPOS_CENTERED,
>        WIN_WIDTH * 4,
>        WIN_HEIGHT * 4,
>        SDL_WINDOW_RESIZABLE);
>    if (window == NULL) {
>        SDL_Log("Unable to create window: %s", SDL_GetError());
>        return 1;
>    }
>
>    // create renderer
>    SDL_Renderer *renderer = SDL_CreateRenderer(
>        window, -1, SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC);
>    if (renderer == NULL) {
>        SDL_Log("Unable to create renderer: %s", SDL_GetError());
>        return 1;
>    }
>
>    // print info on renderer:
>    SDL_RendererInfo renderer_info;
>    SDL_GetRendererInfo(renderer, &renderer_info);
>    SDL_Log("Using renderer %s", renderer_info.name);
>
>    // create texture
>    SDL_Texture *texture = SDL_CreateTexture(
>        renderer,
>        SDL_PIXELFORMAT_RGBA32,
>        SDL_TEXTUREACCESS_TARGET,
>        WIN_WIDTH,
>        WIN_HEIGHT);
>    if (texture == NULL) {
>        SDL_Log("Unable to create texture: %s", SDL_GetError());
>        return 1;
>    }
>
>    // array of pixels
>    uint8_t pixels[WIN_WIDTH * WIN_HEIGHT * 4] = {0};
>    pixels[4 * 0 + 1] = 255;
>    pixels[4 * 1 + 1] = 255;
>    pixels[4 * 2 + 1] = 255;
>    pixels[46400 + 4 * 0 + 0] = 255;
>    pixels[46400 + 4 * 1 + 1] = 255;
>    pixels[46400 + 4 * 2 + 2] = 255;
>    pixels[46400 + 4 * 3 + 0] = 255;
>    pixels[46400 + 4 * 4 + 1] = 255;
>    pixels[46400 + 4 * 5 + 2] = 255;
>    pixels[WIN_WIDTH * WIN_HEIGHT * 4 - 4 * 1] = 255;
>    pixels[WIN_WIDTH * WIN_HEIGHT * 4 - 4 * 2] = 255;
>    pixels[WIN_WIDTH * WIN_HEIGHT * 4 - 4 * 3] = 255;
>
>    // update texture with new data
>    const uint32_t pitch = sizeof(uint8_t) * 4 * WIN_WIDTH;
>    SDL_UpdateTexture(texture, NULL, &pixels, pitch);
>
>    // main loop
>    bool should_quit = false;
>    SDL_Event e;
>    while (!should_quit) {
>        while (SDL_PollEvent(&e) != 0) {
>            if (e.type == SDL_QUIT) {
>                should_quit = true;
>            }
>        }
>
>        // render on screen
>        SDL_RenderClear(renderer);
>        SDL_RenderCopy(renderer, texture, NULL, NULL);
>        SDL_RenderPresent(renderer);
>    }
>
>    SDL_DestroyTexture(texture);
>    SDL_DestroyRenderer(renderer);
>    SDL_DestroyWindow(window);
>    SDL_Quit();
>
>    return 0;
>}

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Attachments on bug 4149: 3230

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.