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Improve upscale filter quality on mobile

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elasota
2020-11-02 19:04:49 -05:00
parent c0f71ca1af
commit 2ab1416eef
5 changed files with 177 additions and 64 deletions
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31
AerofoilSDL/ShaderCode/ScaleQuadP.cpp
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@@ -5,41 +5,16 @@
"\n"\
"uniform vec4 dxdy_dimensions;\n"\
"\n"\
"vec3 SamplePixel(vec2 coord)\n"\
"{\n"\
" return texture2D(surfaceTexture, (coord + vec2(0.5, 0.5)) / dxdy_dimensions.zw).rgb;\n"\
"}\n"\
"\n"\
"void main()\n"\
"{\n"\
" float dx = dxdy_dimensions.x;\n"\
" float dy = dxdy_dimensions.y;\n"\
" vec2 dimensions = dxdy_dimensions.zw;\n"\
" vec2 texCoordInteger = dxdy_dimensions.zw;\n"\
" vec2 tc = texCoord.xy;\n"\
"\n"\
" vec2 pixelTopLeftCoord = max(vec2(0.0, 0.0), texCoord.zw - vec2(dx, dy) * 0.5);\n"\
" vec2 pixelBottomRightCoord = pixelTopLeftCoord + min(vec2(1.0, 1.0), vec2(dx, dy));\n"\
"\n"\
" vec2 topLeftCoordInteger = floor(pixelTopLeftCoord);\n"\
" vec2 bottomRightCoordInteger = floor(pixelBottomRightCoord);\n"\
"\n"\
" vec2 interpolators = saturate((pixelBottomRightCoord - bottomRightCoordInteger) / vec2(dx, dy));\n"\
"\n"\
" vec3 topLeftColor = SamplePixel(topLeftCoordInteger);\n"\
" vec3 topRightColor = SamplePixel(vec2(bottomRightCoordInteger.x, topLeftCoordInteger.y));\n"\
" vec3 bottomLeftColor = SamplePixel(vec2(topLeftCoordInteger.x, bottomRightCoordInteger.y));\n"\
" vec3 bottomRightColor = SamplePixel(bottomRightCoordInteger);\n"\
"\n"\
" vec3 topColor = (1.0 - interpolators.x) * topLeftColor + interpolators.x * topRightColor;\n"\
" vec3 bottomColor = (1.0 - interpolators.x) * bottomLeftColor + interpolators.x * bottomRightColor;\n"\
" vec3 interpolatedColor = (1.0 - interpolators.y) * topColor + interpolators.y * bottomColor;\n"\
"\n"\
" gl_FragColor = vec4(LinearToSRGB(interpolatedColor), 1.0);\n"\
" gl_FragColor = vec4(texture2D(surfaceTexture, tc).rgb, 1.0);\n"\
"}\n"
namespace GpBinarizedShaders
{
const char *g_scaleQuadP_GL2 = GP_GL_SHADER_CODE_PRECISION_PREFIX GP_GL_SHADER_CODE_FUNCTIONS_H GP_GL_SHADER_CODE_SCALEQUADP_GLSL;
const char *g_scaleQuadP_GL2 = GP_GL_SHADER_CODE_MEDIUM_PRECISION_PREFIX GP_GL_SHADER_CODE_FUNCTIONS_H GP_GL_SHADER_CODE_SCALEQUADP_GLSL;
extern const char *g_drawQuadRGBP_GL2;
extern const char *g_drawQuad15BitP_GL2;