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GBA Video: Fix interpolation issues with OpenGL renderer

This commit is contained in:
Vicki Pfau 2023-04-17 22:23:54 -07:00
parent 9fa607b30f
commit 80a8074608
2 changed files with 10 additions and 9 deletions
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1
CHANGES
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@ -16,6 +16,7 @@ Emulation fixes:
- GBA SIO: Normal mode transfers with no clock should not finish (fixes mgba.io/i/2811)
- GBA Timers: Cascading timers don't tick when disabled (fixes mgba.io/i/2812)
- GBA Video: Disable BG target 1 blending when OBJ blending (fixes mgba.io/i/2722)
- GBA Video: Fix interpolation issues with OpenGL renderer
Other fixes:
- Core: Allow sending thread requests to a crashed core (fixes mgba.io/i/2784)
- FFmpeg: Force lower sample rate for codecs not supporting high rates (fixes mgba.io/i/2869)

18
src/gba/renderers/gl.c
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@ -289,12 +289,12 @@ static const char* const _renderMode2 =
" }\n"
" loadAffine(int(incoord.y), mat, offset);\n"
" float y = fract(incoord.y);\n"
" float start = 0.75;\n"
" float start = 2. / 3.;\n"
" if (int(incoord.y) - range.x < 4) {\n"
" y = incoord.y - float(range.x);\n"
" start = 0.;\n"
" start -= 1.;\n"
" }\n"
" float lin = start + y * 0.25;\n"
" float lin = start + y / 3.;\n"
" vec2 mixedTransform = interpolate(mat, lin);\n"
" vec2 mixedOffset = interpolate(offset, lin);\n"
" int paletteEntry = fetchTile(ivec2(mixedTransform * incoord.x + mixedOffset));\n"
@ -340,12 +340,12 @@ static const char* const _renderMode35 =
" }\n"
" loadAffine(int(incoord.y), mat, offset);\n"
" float y = fract(incoord.y);\n"
" float start = 0.75;\n"
" float start = 2. / 3.;\n"
" if (int(incoord.y) - range.x < 4) {\n"
" y = incoord.y - float(range.x);\n"
" start = 0.;\n"
" start -= 1.;\n"
" }\n"
" float lin = start + y * 0.25;\n"
" float lin = start + y / 3.;\n"
" vec2 mixedTransform = interpolate(mat, lin);\n"
" vec2 mixedOffset = interpolate(offset, lin);\n"
" ivec2 coord = ivec2(mixedTransform * incoord.x + mixedOffset);\n"
@ -401,12 +401,12 @@ static const char* const _renderMode4 =
" }\n"
" loadAffine(int(incoord.y), mat, offset);\n"
" float y = fract(incoord.y);\n"
" float start = 0.75;\n"
" float start = 2. / 3.;\n"
" if (int(incoord.y) - range.x < 4) {\n"
" y = incoord.y - float(range.x);\n"
" start = 0.;\n"
" start -= 1.;\n"
" }\n"
" float lin = start + y * 0.25;\n"
" float lin = start + y / 3.;\n"
" vec2 mixedTransform = interpolate(mat, lin);\n"
" vec2 mixedOffset = interpolate(offset, lin);\n"
" ivec2 coord = ivec2(mixedTransform * incoord.x + mixedOffset);\n"