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render: Remove the logical presentation render target.

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Now we render directly to the window, scaling as appropriate. This fixes some
concerns the render target introduced, like the quality of the final scaled
output, how to step outside of the logical size temporarily to draw some
things sharply at the native resolution, and loss of sub-pixel precision.

Fixes #8736.
This commit is contained in:
Ryan C. Gordon 2024-09-16 13:33:16 -04:00
parent bf7a48cdcc
commit 54459def69
16 changed files with 293 additions and 387 deletions
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56
test/testautomation_render.c
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@ -1089,7 +1089,6 @@ static int SDLCALL render_testLogicalSize(void *arg)
int w, h;
int set_w, set_h;
SDL_RendererLogicalPresentation set_presentation_mode;
SDL_ScaleMode set_scale_mode;
SDL_FRect set_rect;
const int factor = 2;
@ -1108,16 +1107,13 @@ static int SDLCALL render_testLogicalSize(void *arg)
/* Set the logical size and do a fill operation */
CHECK_FUNC(SDL_GetCurrentRenderOutputSize, (renderer, &w, &h))
CHECK_FUNC(SDL_SetRenderLogicalPresentation, (renderer, w / factor, h / factor,
SDL_LOGICAL_PRESENTATION_LETTERBOX,
SDL_SCALEMODE_NEAREST))
CHECK_FUNC(SDL_GetRenderLogicalPresentation, (renderer, &set_w, &set_h, &set_presentation_mode, &set_scale_mode))
CHECK_FUNC(SDL_SetRenderLogicalPresentation, (renderer, w / factor, h / factor, SDL_LOGICAL_PRESENTATION_LETTERBOX))
CHECK_FUNC(SDL_GetRenderLogicalPresentation, (renderer, &set_w, &set_h, &set_presentation_mode))
SDLTest_AssertCheck(
set_w == (w / factor) &&
set_h == (h / factor) &&
set_presentation_mode == SDL_LOGICAL_PRESENTATION_LETTERBOX &&
set_scale_mode == SDL_SCALEMODE_NEAREST,
"Validate result from SDL_GetRenderLogicalPresentation, got %d, %d, %d, %d", set_w, set_h, set_presentation_mode, set_scale_mode);
set_presentation_mode == SDL_LOGICAL_PRESENTATION_LETTERBOX,
"Validate result from SDL_GetRenderLogicalPresentation, got %d, %d, %d", set_w, set_h, set_presentation_mode);
CHECK_FUNC(SDL_GetRenderLogicalPresentationRect, (renderer, &set_rect))
SDLTest_AssertCheck(
set_rect.x == 0.0f &&
@ -1131,16 +1127,13 @@ static int SDLCALL render_testLogicalSize(void *arg)
rect.w = (float)viewport.w / factor;
rect.h = (float)viewport.h / factor;
CHECK_FUNC(SDL_RenderFillRect, (renderer, &rect))
CHECK_FUNC(SDL_SetRenderLogicalPresentation, (renderer, 0, 0,
SDL_LOGICAL_PRESENTATION_DISABLED,
SDL_SCALEMODE_NEAREST))
CHECK_FUNC(SDL_GetRenderLogicalPresentation, (renderer, &set_w, &set_h, &set_presentation_mode, &set_scale_mode))
CHECK_FUNC(SDL_SetRenderLogicalPresentation, (renderer, 0, 0, SDL_LOGICAL_PRESENTATION_DISABLED))
CHECK_FUNC(SDL_GetRenderLogicalPresentation, (renderer, &set_w, &set_h, &set_presentation_mode))
SDLTest_AssertCheck(
set_w == 0 &&
set_h == 0 &&
set_presentation_mode == SDL_LOGICAL_PRESENTATION_DISABLED &&
set_scale_mode == SDL_SCALEMODE_NEAREST,
"Validate result from SDL_GetRenderLogicalPresentation, got %d, %d, %d, %d", set_w, set_h, set_presentation_mode, set_scale_mode);
set_presentation_mode == SDL_LOGICAL_PRESENTATION_DISABLED,
"Validate result from SDL_GetRenderLogicalPresentation, got %d, %d, %d", set_w, set_h, set_presentation_mode);
CHECK_FUNC(SDL_GetRenderLogicalPresentationRect, (renderer, &set_rect))
SDLTest_AssertCheck(
set_rect.x == 0.0f &&
@ -1157,20 +1150,16 @@ static int SDLCALL render_testLogicalSize(void *arg)
/* Set the logical size and viewport and do a fill operation */
CHECK_FUNC(SDL_GetCurrentRenderOutputSize, (renderer, &w, &h))
CHECK_FUNC(SDL_SetRenderLogicalPresentation, (renderer, w / factor, h / factor,
SDL_LOGICAL_PRESENTATION_LETTERBOX,
SDL_SCALEMODE_NEAREST))
CHECK_FUNC(SDL_SetRenderLogicalPresentation, (renderer, w / factor, h / factor, SDL_LOGICAL_PRESENTATION_LETTERBOX))
viewport.x = (TESTRENDER_SCREEN_W / 4) / factor;
viewport.y = (TESTRENDER_SCREEN_H / 4) / factor;
viewport.w = (TESTRENDER_SCREEN_W / 2) / factor;
viewport.h = (TESTRENDER_SCREEN_H / 2) / factor;
viewport.w = TESTRENDER_SCREEN_W / factor;
viewport.h = TESTRENDER_SCREEN_H / factor;
CHECK_FUNC(SDL_SetRenderViewport, (renderer, &viewport))
CHECK_FUNC(SDL_SetRenderDrawColor, (renderer, 0, 255, 0, SDL_ALPHA_OPAQUE))
CHECK_FUNC(SDL_RenderFillRect, (renderer, NULL))
CHECK_FUNC(SDL_SetRenderViewport, (renderer, NULL))
CHECK_FUNC(SDL_SetRenderLogicalPresentation, (renderer, 0, 0,
SDL_LOGICAL_PRESENTATION_DISABLED,
SDL_SCALEMODE_NEAREST))
CHECK_FUNC(SDL_SetRenderLogicalPresentation, (renderer, 0, 0, SDL_LOGICAL_PRESENTATION_DISABLED))
/* Check to see if final image matches. */
compare(referenceSurface, ALLOWABLE_ERROR_OPAQUE);
@ -1196,15 +1185,13 @@ static int SDLCALL render_testLogicalSize(void *arg)
CHECK_FUNC(SDL_SetRenderLogicalPresentation, (renderer,
w - 2 * (TESTRENDER_SCREEN_W / 4),
h,
SDL_LOGICAL_PRESENTATION_LETTERBOX,
SDL_SCALEMODE_LINEAR))
CHECK_FUNC(SDL_GetRenderLogicalPresentation, (renderer, &set_w, &set_h, &set_presentation_mode, &set_scale_mode))
SDL_LOGICAL_PRESENTATION_LETTERBOX))
CHECK_FUNC(SDL_GetRenderLogicalPresentation, (renderer, &set_w, &set_h, &set_presentation_mode))
SDLTest_AssertCheck(
set_w == w - 2 * (TESTRENDER_SCREEN_W / 4) &&
set_h == h &&
set_presentation_mode == SDL_LOGICAL_PRESENTATION_LETTERBOX &&
set_scale_mode == SDL_SCALEMODE_LINEAR,
"Validate result from SDL_GetRenderLogicalPresentation, got %d, %d, %d, %d", set_w, set_h, set_presentation_mode, set_scale_mode);
set_presentation_mode == SDL_LOGICAL_PRESENTATION_LETTERBOX,
"Validate result from SDL_GetRenderLogicalPresentation, got %d, %d, %d", set_w, set_h, set_presentation_mode);
CHECK_FUNC(SDL_GetRenderLogicalPresentationRect, (renderer, &set_rect))
SDLTest_AssertCheck(
set_rect.x == 20.0f &&
@ -1214,16 +1201,13 @@ static int SDLCALL render_testLogicalSize(void *arg)
"Validate result from SDL_GetRenderLogicalPresentationRect, got {%g, %g, %gx%g}", set_rect.x, set_rect.y, set_rect.w, set_rect.h);
CHECK_FUNC(SDL_SetRenderDrawColor, (renderer, 0, 255, 0, SDL_ALPHA_OPAQUE))
CHECK_FUNC(SDL_RenderFillRect, (renderer, NULL))
CHECK_FUNC(SDL_SetRenderLogicalPresentation, (renderer, 0, 0,
SDL_LOGICAL_PRESENTATION_DISABLED,
SDL_SCALEMODE_NEAREST))
CHECK_FUNC(SDL_GetRenderLogicalPresentation, (renderer, &set_w, &set_h, &set_presentation_mode, &set_scale_mode))
CHECK_FUNC(SDL_SetRenderLogicalPresentation, (renderer, 0, 0, SDL_LOGICAL_PRESENTATION_DISABLED))
CHECK_FUNC(SDL_GetRenderLogicalPresentation, (renderer, &set_w, &set_h, &set_presentation_mode))
SDLTest_AssertCheck(
set_w == 0 &&
set_h == 0 &&
set_presentation_mode == SDL_LOGICAL_PRESENTATION_DISABLED &&
set_scale_mode == SDL_SCALEMODE_NEAREST,
"Validate result from SDL_GetRenderLogicalPresentation, got %d, %d, %d, %d", set_w, set_h, set_presentation_mode, set_scale_mode);
set_presentation_mode == SDL_LOGICAL_PRESENTATION_DISABLED,
"Validate result from SDL_GetRenderLogicalPresentation, got %d, %d, %d", set_w, set_h, set_presentation_mode);
CHECK_FUNC(SDL_GetRenderLogicalPresentationRect, (renderer, &set_rect))
SDLTest_AssertCheck(
set_rect.x == 0.0f &&