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Fixed the logical size for rendering to texture, thanks to Mason Wheeler.

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Mason Wheeler

The SDL_RenderGetLogicalSize function should always return the amount of pixels that are currently available for rendering to.  But after updating to the latest SDL2, I started getting crashes because it was returning (0,0) as the logical size!  After a bit of debugging, I tracked it down to the following code in SDL_SetRenderTarget:

    if (texture) {
        renderer->viewport.x = 0;
        renderer->viewport.y = 0;
        renderer->viewport.w = texture->w;
        renderer->viewport.h = texture->h;
        renderer->scale.x = 1.0f;
        renderer->scale.y = 1.0f;
        renderer->logical_w = 0;
        renderer->logical_h = 0;
    }

This is obviously wrong; 0 is never the correct value for a valid renderer.  Those last two lines should read:

        renderer->logical_w = texture->w;
        renderer->logical_h = texture->h;
This commit is contained in:
Sam Lantinga 2013-06-29 14:40:55 -07:00
parent fd6dde1327
commit 7ff764a482
1 changed files with 2 additions and 2 deletions
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4
src/render/SDL_render.c
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@ -950,8 +950,8 @@ SDL_SetRenderTarget(SDL_Renderer *renderer, SDL_Texture *texture)
renderer->viewport.h = texture->h;
renderer->scale.x = 1.0f;
renderer->scale.y = 1.0f;
renderer->logical_w = 0;
renderer->logical_h = 0;
renderer->logical_w = texture->w;
renderer->logical_h = texture->h;
} else {
renderer->viewport = renderer->viewport_backup;
renderer->clip_rect = renderer->clip_rect_backup;