diff options
Diffstat (limited to 'backends/gp32/gp32std_grap.cpp')
| -rw-r--r-- | backends/gp32/gp32std_grap.cpp | 37 |
1 files changed, 25 insertions, 12 deletions
diff --git a/backends/gp32/gp32std_grap.cpp b/backends/gp32/gp32std_grap.cpp index 5ccd9b47a6..ded5b34107 100644 --- a/backends/gp32/gp32std_grap.cpp +++ b/backends/gp32/gp32std_grap.cpp @@ -28,7 +28,7 @@ #include "backends/gp32/gp32std.h" #include "backends/gp32/gp32std_grap.h" -#include "backends/gp32/gp32_launcher.h" +#include "backends/gp32/globals.h" GPDRAWSURFACE lcdSurface[2]; @@ -37,6 +37,9 @@ uint8 flipIndex = 1; uint16 *frameBuffer1; uint16 *frameBuffer2; +uint8 gammaLUT[256]; +uint8 gammaLUTInv[256]; + extern const unsigned char fontresEng1[]; extern const unsigned char fontresKor1[]; @@ -87,15 +90,25 @@ void gp_fillRect(uint16 *frameBuffer, int16 x, int16 y, int16 w, int16 h, uint16 } } +void gp_initGammaTable(float value) +{ + for(int i = 0; i < 256; i++) { + if(value == 1.0f) { + gammaLUT[i] = i; + gammaLUTInv[i] = i; + } else { + gammaLUT[i] = (uint8)(pow((double)i / 256, 1 / (double)value) * 256); + gammaLUTInv[i] = (uint8)(pow((double)i / 256, (double)value) * 256); + } + } +} + uint16 gp_RGBTo16(uint16 r, uint16 g, uint16 b) { // GP32 16bit color 5551 - if(g_gammaRamp != 100) { - r *= ((float)g_gammaRamp / 100); - g *= ((float)g_gammaRamp / 100); - b *= ((float)g_gammaRamp / 100); - r = r >= 255 ? 255 : r; - g = g >= 255 ? 255 : g; - b = b >= 255 ? 255 : b; + if(g_vars.gammaRamp != 10000) { + r = gammaLUT[r]; + g = gammaLUT[g]; + b = gammaLUT[b]; } return (((r >> 3) & 0x1F) << 11) | (((g >> 3) & 0x1F) << 6) | ((b >> 3) & 0x1F) << 1; } @@ -105,10 +118,10 @@ void gp_16ToRGB(uint16 color, uint8 *r, uint8 *g, uint8 *b) { *g = ((((color) >> 6) & 0x1F) << 3); //(((color>>5)&0x3F) << 2); *b = ((((color) >> 1) & 0x1F) << 3); //((color&0x1F) << 3); - if(g_gammaRamp != 100) { - *r /= ((float)g_gammaRamp / 100); - *g /= ((float)g_gammaRamp / 100); - *b /= ((float)g_gammaRamp / 100); + if(g_vars.gammaRamp != 10000) { + *r = gammaLUTInv[*r]; + *g = gammaLUTInv[*g]; + *b = gammaLUTInv[*b]; } } |