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Diffstat (limited to 'src/image_processing_effects.c')
| -rw-r--r-- | src/image_processing_effects.c | 1226 |
1 files changed, 1226 insertions, 0 deletions
diff --git a/src/image_processing_effects.c b/src/image_processing_effects.c new file mode 100644 index 000000000..13794faf0 --- /dev/null +++ b/src/image_processing_effects.c @@ -0,0 +1,1226 @@ +#include "global.h" +#include "image_processing_effects.h" +#include "contest_painting.h" +#include "constants/rgb.h" + +// IWRAM common +u8 gCanvasColumnStart; +u16 (*gCanvasPixels)[][32]; +u8 gCanvasRowEnd; +u8 gCanvasHeight; +u8 gCanvasColumnEnd; +u8 gCanvasRowStart; +u8 gCanvasMonPersonality; +u8 gCanvasWidth; +u16 *gCanvasPalette; +u16 gCanvasPaletteStart; + +static void ApplyImageEffect_Pointillism(void); +static void ApplyImageEffect_Blur(void); +static void ApplyImageEffect_BlackOutline(void); +static void ApplyImageEffect_Invert(void); +static void ApplyImageEffect_BlackAndWhite(void); +static void ApplyImageEffect_BlurRight(void); +static void ApplyImageEffect_BlurDown(void); +static void ApplyImageEffect_Shimmer(void); +static void ApplyImageEffect_Grayscale(void); +static void ApplyImageEffect_PersonalityColor(u8); +static void ApplyImageEffect_RedChannelGrayscale(u8); +static void ApplyImageEffect_RedChannelGrayscaleHighlight(u8); +static void AddPointillismPoints(u16); +static u16 ConvertColorToGrayscale(u16*); +static u16 QuantizePixel_Blur(u16*, u16*, u16*); +static u16 QuantizePixel_PersonalityColor(u16*, u8); +static u16 QuantizePixel_BlackAndWhite(u16*); +static u16 QuantizePixel_BlackOutline(u16*, u16*); +static u16 QuantizePixel_Invert(u16*); +static u16 QuantizePixel_BlurHard(u16*, u16*, u16*); +static u16 QuantizePixel_MotionBlur(u16*, u16*); +static u16 GetColorFromPersonality(u8); +static void QuantizePalette_Standard(bool8); +static void SetPresetPalette_PrimaryColors(void); +static void QuantizePalette_PrimaryColors(void); +static void SetPresetPalette_Grayscale(void); +static void QuantizePalette_Grayscale(void); +static void SetPresetPalette_GrayscaleSmall(void); +static void QuantizePalette_GrayscaleSmall(void); +static void SetPresetPalette_BlackAndWhite(void); +static void QuantizePalette_BlackAndWhite(void); +static u16 QuantizePixel_Standard(u16*); +static u16 QuantizePixel_GrayscaleSmall(u16*); +static u16 QuantizePixel_Grayscale(u16*); +static u16 QuantizePixel_PrimaryColors(u16*); + +extern const u8 gPointillismPoints[][3]; + +void ApplyImageProcessingEffects(struct ImageProcessingContext *context) +{ + gCanvasPixels = context->canvasPixels; + gCanvasMonPersonality = context->personality; + gCanvasColumnStart = context->columnStart; + gCanvasRowStart = context->rowStart; + gCanvasColumnEnd = context->columnEnd; + gCanvasRowEnd = context->rowEnd; + gCanvasWidth = context->canvasWidth; + gCanvasHeight = context->canvasHeight; + + switch (context->effect) + { + case IMAGE_EFFECT_POINTILLISM: + ApplyImageEffect_Pointillism(); + break; + case IMAGE_EFFECT_BLUR: + ApplyImageEffect_Blur(); + break; + case IMAGE_EFFECT_OUTLINE_COLORED: + ApplyImageEffect_BlackOutline(); + ApplyImageEffect_PersonalityColor(gCanvasMonPersonality); + break; + case IMAGE_EFFECT_INVERT_BLACK_WHITE: + ApplyImageEffect_BlackOutline(); + ApplyImageEffect_Invert(); + ApplyImageEffect_BlackAndWhite(); + case IMAGE_EFFECT_INVERT: + ApplyImageEffect_Invert(); + break; + case IMAGE_EFFECT_THICK_BLACK_WHITE: + ApplyImageEffect_BlackOutline(); + ApplyImageEffect_BlurRight(); + ApplyImageEffect_BlurRight(); + ApplyImageEffect_BlurDown(); + ApplyImageEffect_BlackAndWhite(); + break; + case IMAGE_EFFECT_SHIMMER: + ApplyImageEffect_Shimmer(); + break; + case IMAGE_EFFECT_OUTLINE: + ApplyImageEffect_BlackOutline(); + break; + case IMAGE_EFFECT_BLUR_RIGHT: + ApplyImageEffect_BlurRight(); + break; + case IMAGE_EFFECT_BLUR_DOWN: + ApplyImageEffect_BlurDown(); + break; + case IMAGE_EFFECT_GRAYSCALE_LIGHT: + ApplyImageEffect_Grayscale(); + ApplyImageEffect_RedChannelGrayscale(3); + break; + case IMAGE_EFFECT_CHARCOAL: + ApplyImageEffect_BlackOutline(); + ApplyImageEffect_BlurRight(); + ApplyImageEffect_BlurDown(); + ApplyImageEffect_BlackAndWhite(); + ApplyImageEffect_Blur(); + ApplyImageEffect_Blur(); + ApplyImageEffect_RedChannelGrayscale(2); + ApplyImageEffect_RedChannelGrayscaleHighlight(4); + break; + } +} + +static void ApplyImageEffect_RedChannelGrayscale(u8 delta) +{ + u8 i, j; + + for (j = 0; j < gCanvasRowEnd; j++) + { + u16 *pixelRow = &(*gCanvasPixels)[0][(gCanvasRowStart + j) * gCanvasWidth]; + u16 *pixel = &pixelRow[gCanvasColumnStart]; + for (i = 0; i < gCanvasColumnEnd; i++, pixel++) + { + if (!(0x8000 & *pixel)) + { + // Gets the grayscale value, based on the pixel's red channel. + // Also adds a delta to skew lighter or darker. + u8 grayValue = (31 & *pixel); + grayValue += delta; + if (grayValue > 31) + grayValue = 31; + + *pixel = RGB2(grayValue, grayValue, grayValue); + } + } + } +} + +static void ApplyImageEffect_RedChannelGrayscaleHighlight(u8 highlight) +{ + u8 i, j; + + for (j = 0; j < gCanvasRowEnd; j++) + { + u16 *pixelRow = &(*gCanvasPixels)[0][(gCanvasRowStart + j) * gCanvasWidth]; + u16 *pixel = &pixelRow[gCanvasColumnStart]; + for (i = 0; i < gCanvasColumnEnd; i++, pixel++) + { + if (!(0x8000 & *pixel)) + { + u8 grayValue = (31 & *pixel); + if (grayValue > 31 - highlight) + grayValue = 31 - (highlight >> 1); + + *pixel = RGB2(grayValue, grayValue, grayValue); + } + } + } +} + +static void ApplyImageEffect_Pointillism(void) +{ + u32 i; + for (i = 0; i < 3200; i++) + AddPointillismPoints(i); +} + +static void ApplyImageEffect_Grayscale(void) +{ + u8 i, j; + + for (j = 0; j < gCanvasRowEnd; j++) + { + u16 *pixelRow = &(*gCanvasPixels)[0][(gCanvasRowStart + j) * gCanvasWidth]; + u16 *pixel = &pixelRow[gCanvasColumnStart]; + for (i = 0; i < gCanvasColumnEnd; i++, pixel++) + { + if (!(0x8000 & *pixel)) + *pixel = ConvertColorToGrayscale(pixel); + } + } +} + +static void ApplyImageEffect_Blur(void) +{ + u8 i, j; + + for (i = 0; i < gCanvasColumnEnd; i++) + { + u16 *pixelRow = &(*gCanvasPixels)[0][gCanvasRowStart * gCanvasWidth]; + u16 *pixel = &pixelRow[gCanvasColumnStart + i]; + u16 prevPixel = *pixel; + + j = 1; + pixel += gCanvasWidth; + while (j < gCanvasRowEnd - 1) + { + if (!(0x8000 & *pixel)) + { + *pixel = QuantizePixel_Blur(&prevPixel, pixel, pixel + gCanvasWidth); + prevPixel = *pixel; + } + + j++; + pixel += gCanvasWidth; + } + } +} + +static void ApplyImageEffect_PersonalityColor(u8 personality) +{ + u8 i, j; + + for (j = 0; j < gCanvasRowEnd; j++) + { + u16 *pixelRow = &(*gCanvasPixels)[0][(gCanvasRowStart + j) * gCanvasWidth]; + u16 *pixel = &pixelRow[gCanvasColumnStart]; + for (i = 0; i < gCanvasColumnEnd; i++, pixel++) + { + if (!(0x8000 & *pixel)) + *pixel = QuantizePixel_PersonalityColor(pixel, personality); + } + } +} + +static void ApplyImageEffect_BlackAndWhite(void) +{ + u8 i, j; + + for (j = 0; j < gCanvasRowEnd; j++) + { + u16 *pixelRow = &(*gCanvasPixels)[0][(gCanvasRowStart + j) * gCanvasWidth]; + u16 *pixel = &pixelRow[gCanvasColumnStart]; + for (i = 0; i < gCanvasColumnEnd; i++, pixel++) + { + if (!(0x8000 & *pixel)) + *pixel = QuantizePixel_BlackAndWhite(pixel); + } + } +} + +static void ApplyImageEffect_BlackOutline(void) +{ + u8 i, j; + u16 *pixel; + + // Handle top row of pixels first. + for (j = 0; j < gCanvasRowEnd; j++) + { + u16 *pixelRow = &(*gCanvasPixels)[0][(gCanvasRowStart + j) * gCanvasWidth]; + pixel = &pixelRow[gCanvasColumnStart]; + *pixel = QuantizePixel_BlackOutline(pixel, pixel + 1); + for (i = 1, pixel++; i < gCanvasColumnEnd - 1; i++, pixel++) + { + *pixel = QuantizePixel_BlackOutline(pixel, pixel + 1); + *pixel = QuantizePixel_BlackOutline(pixel, pixel - 1); + } + + *pixel = QuantizePixel_BlackOutline(pixel, pixel - 1); + } + + // Handle each column from left to right. + for (i = 0; i < gCanvasColumnEnd; i++) + { + u16 *pixelRow = &(*gCanvasPixels)[0][gCanvasRowStart * gCanvasWidth]; + pixel = &pixelRow[gCanvasColumnStart + i]; + *pixel = QuantizePixel_BlackOutline(pixel, pixel + gCanvasWidth); + for (j = 1, pixel += gCanvasWidth; j < gCanvasRowEnd - 1; j++, pixel += gCanvasWidth) + { + *pixel = QuantizePixel_BlackOutline(pixel, pixel + gCanvasWidth); + *pixel = QuantizePixel_BlackOutline(pixel, pixel - gCanvasWidth); + } + + *pixel = QuantizePixel_BlackOutline(pixel, pixel - gCanvasWidth); + } +} + +static void ApplyImageEffect_Invert(void) +{ + u8 i, j; + + for (j = 0; j < gCanvasRowEnd; j++) + { + u16 *pixelRow = &(*gCanvasPixels)[0][(gCanvasRowStart + j) * gCanvasWidth]; + u16 *pixel = &pixelRow[gCanvasColumnStart]; + for (i = 0; i < gCanvasColumnEnd; i++, pixel++) + { + if (!(0x8000 & *pixel)) + *pixel = QuantizePixel_Invert(pixel); + } + } +} + +static void ApplyImageEffect_Shimmer(void) +{ + u8 i, j; + u16 *pixel; + u16 prevPixel; + + // First, invert all of the colors. + pixel = (*gCanvasPixels)[0]; + for (i = 0; i < 64; i++) + { + for (j = 0; j < 64; j++, pixel++) + { + if (!(0x8000 & *pixel)) + *pixel = QuantizePixel_Invert(pixel); + } + } + + // Blur the pixels twice. + for (j = 0; j < 64; j++) + { + pixel = &(*gCanvasPixels)[0][j]; + prevPixel = *pixel; + *pixel = 0x8000; + for (i = 1, pixel += 64; i < 63; i++, pixel += 64) + { + if (!(0x8000 & *pixel)) + { + *pixel = QuantizePixel_BlurHard(&prevPixel, pixel, pixel + 64); + prevPixel = *pixel; + } + } + + *pixel = 0x8000; + pixel = &(*gCanvasPixels)[0][j]; + prevPixel = *pixel; + *pixel = 0x8000; + for (i = 1, pixel += 64; i < 63; i++, pixel += 64) + { + if (!(0x8000 & *pixel)) + { + *pixel = QuantizePixel_BlurHard(&prevPixel, pixel, pixel + 64); + prevPixel = *pixel; + } + } + + *pixel = 0x8000; + } + + // Finally, invert colors back to the original color space. + // The above blur causes the outline areas to darken, which makes + // this inversion give the effect of light outlines. + pixel = (*gCanvasPixels)[0]; + for (i = 0; i < 64; i++) + { + for (j = 0; j < 64; j++, pixel++) + { + if (!(0x8000 & *pixel)) + *pixel = QuantizePixel_Invert(pixel); + } + } +} + +static void ApplyImageEffect_BlurRight(void) +{ + u8 i, j; + + for (j = 0; j < gCanvasRowEnd; j++) + { + u16 *pixelRow = &(*gCanvasPixels)[0][(gCanvasRowStart + j) * gCanvasWidth]; + u16 *pixel = &pixelRow[gCanvasColumnStart]; + u16 prevPixel = *pixel; + for (i = 1, pixel++; i < gCanvasColumnEnd - 1; i++, pixel++) + { + if (!(0x8000 & *pixel)) + { + *pixel = QuantizePixel_MotionBlur(&prevPixel, pixel); + prevPixel = *pixel; + } + } + } +} + +static void ApplyImageEffect_BlurDown(void) +{ + u8 i, j; + + for (i = 0; i < gCanvasColumnEnd; i++) + { + u16 *pixelRow = &(*gCanvasPixels)[0][gCanvasRowStart * gCanvasWidth]; + u16 *pixel = &pixelRow[gCanvasColumnStart + i]; + u16 prevPixel = *pixel; + for (j = 1, pixel += gCanvasWidth; j < gCanvasRowEnd - 1; j++, pixel += gCanvasWidth) + { + if (!(0x8000 & *pixel)) + { + *pixel = QuantizePixel_MotionBlur(&prevPixel, pixel); + prevPixel = *pixel; + } + } + } +} + +struct PointillismPoint +{ + u8 column; + u8 row; + u16 delta; +}; + +static void AddPointillismPoints(u16 arg0) +{ + u8 i; + bool8 offsetDownLeft; + u8 colorType; + struct PointillismPoint points[6]; + + points[0].column = gPointillismPoints[arg0][0]; + points[0].row = gPointillismPoints[arg0][1]; + points[0].delta = (gPointillismPoints[arg0][2] >> 3) & 7; + + colorType = (gPointillismPoints[arg0][2] >> 1) & 3; + offsetDownLeft = gPointillismPoints[arg0][2] & 1; + for (i = 1; i < points[0].delta; i++) + { + if (!offsetDownLeft) + { + points[i].column = points[0].column - i; + points[i].row = points[0].row + i; + } + else + { + points[i].column = points[0].column + 1; + points[i].row = points[0].row - 1; + } + + if (points[i].column > 63 || points[i].row > 63) + { + points[0].delta = i - 1; + break; + } + + points[i].delta = points[0].delta - i; + } + + for (i = 0; i < points[0].delta; i++) + { + u16 *pixel = &(*gCanvasPixels)[points[i].row * 2][points[i].column]; + + if (!(0x8000 & *pixel)) + { + u16 red = (*pixel) & 0x1F; + u16 green = (*pixel >> 5) & 0x1F; + u16 blue = (*pixel >> 10) & 0x1F; + + switch (colorType) + { + case 0: + case 1: + switch (((gPointillismPoints[arg0][2] >> 3) & 7) % 3) + { + case 0: + if (red >= points[i].delta) + red -= points[i].delta; + else + red = 0; + break; + case 1: + if (green >= points[i].delta) + green -= points[i].delta; + else + green = 0; + break; + case 2: + if (blue >= points[i].delta) + blue -= points[i].delta; + else + blue = 0; + break; + } + break; + case 2: + case 3: + red += points[i].delta; + green += points[i].delta; + blue += points[i].delta; + if (red > 31) + red = 31; + if (green > 31) + green = 31; + if (blue > 31) + blue = 31; + break; + } + + *pixel = RGB2(red, green, blue); + } + } +} + +static u16 ConvertColorToGrayscale(u16 *color) +{ + s32 clr = *color; + s32 r = clr & 0x1F; + s32 g = (clr >> 5) & 0x1F; + s32 b = (clr >> 10) & 0x1F; + s32 gray = (r * Q_8_8(0.3) + g * Q_8_8(0.59) + b * Q_8_8(0.1133)) >> 8; + return RGB2(gray, gray, gray); +} + +// The dark colors are the colored edges of the Cool painting effect. +// Everything else is white. +static u16 QuantizePixel_PersonalityColor(u16 *color, u8 personality) +{ + u16 red = *color & 0x1F; + u16 green = (*color >> 5) & 0x1F; + u16 blue = (*color >> 10) & 0x1F; + + if (red < 17 && green < 17 && blue < 17) + return GetColorFromPersonality(personality); + else + return RGB_WHITE; +} + +// Based on the given value, which comes from the first 8 bits of +// the mon's personality value, return a color. +static u16 GetColorFromPersonality(u8 personality) +{ + u16 red = 0; + u16 green = 0; + u16 blue = 0; + u8 strength = (personality / 6) % 3; + u8 colorType = personality % 6; + + switch (colorType) + { + case 0: + // Teal color + green = 21 - strength; + blue = green; + red = 0; + break; + case 1: + // Yellow color + blue = 0; + red = 21 - strength; + green = red; + break; + case 2: + // Purple color + blue = 21 - strength; + green = 0; + red = blue; + break; + case 3: + // Red color + blue = 0; + green = 0; + red = 23 - strength; + break; + case 4: + // Blue color + blue = 23 - strength; + green = 0; + red = 0; + break; + case 5: + // Green color + blue = 0; + green = 23 - strength; + red = 0; + break; + } + + return RGB2(red, green, blue); +} + +static u16 QuantizePixel_BlackAndWhite(u16 *color) +{ + u16 red = *color & 0x1F; + u16 green = (*color >> 5) & 0x1F; + u16 blue = (*color >> 10) & 0x1F; + + if (red < 17 && green < 17 && blue < 17) + return RGB_BLACK; + else + return RGB_WHITE; +} + +static u16 QuantizePixel_BlackOutline(u16 *pixelA, u16 *pixelB) +{ + if (*pixelA != RGB_BLACK) + { + if (*pixelA & 0x8000) + return 0x8000; + if (*pixelB & 0x8000) + return RGB_BLACK; + + return *pixelA; + } + + return RGB_BLACK; +} + +static u16 QuantizePixel_Invert(u16 *color) +{ + u16 red = *color & 0x1F; + u16 green = (*color >> 5) & 0x1F; + u16 blue = (*color >> 10) & 0x1F; + + red = 31 - red; + green = 31 - green; + blue = 31 - blue; + + return RGB2(red, green, blue); +} + +static u16 QuantizePixel_MotionBlur(u16 *prevPixel, u16 *curPixel) +{ + u16 pixelChannels[2][3]; + u16 diffs[3]; + u8 i; + u16 largestDiff; + u16 red, green, blue; + + if (*prevPixel == *curPixel) + return *curPixel; + + pixelChannels[0][0] = (*prevPixel >> 0) & 0x1F; + pixelChannels[0][1] = (*prevPixel >> 5) & 0x1F; + pixelChannels[0][2] = (*prevPixel >> 10) & 0x1F; + pixelChannels[1][0] = (*curPixel >> 0) & 0x1F; + pixelChannels[1][1] = (*curPixel >> 5) & 0x1F; + pixelChannels[1][2] = (*curPixel >> 10) & 0x1F; + + // Don't blur light colors. + if (pixelChannels[0][0] > 25 && pixelChannels[0][1] > 25 && pixelChannels[0][2] > 25) + return *curPixel; + if (pixelChannels[1][0] > 25 && pixelChannels[1][1] > 25 && pixelChannels[1][2] > 25) + return *curPixel; + + for (i = 0; i < 3; i++) + { + if (pixelChannels[0][i] > pixelChannels[1][i]) + diffs[i] = pixelChannels[0][i] - pixelChannels[1][i]; + else + diffs[i] = pixelChannels[1][i] - pixelChannels[0][i]; + } + + // Find the largest diff of any of the color channels. + if (diffs[0] >= diffs[1]) + { + if (diffs[0] >= diffs[2]) + largestDiff = diffs[0]; + else if (diffs[1] >= diffs[2]) + largestDiff = diffs[1]; + else + largestDiff = diffs[2]; + } + else + { + if (diffs[1] >= diffs[2]) + largestDiff = diffs[1]; + else if (diffs[2] >= diffs[0]) + largestDiff = diffs[2]; + else + largestDiff = diffs[0]; + } + + red = (pixelChannels[1][0] * (31 - largestDiff / 2)) / 31; + green = (pixelChannels[1][1] * (31 - largestDiff / 2)) / 31; + blue = (pixelChannels[1][2] * (31 - largestDiff / 2)) / 31; + return RGB2(red, green, blue); +} + +static u16 QuantizePixel_Blur(u16 *prevPixel, u16 *curPixel, u16 *nextPixel) +{ + u16 red, green, blue; + u16 prevAvg, curAvg, nextAvg; + u16 prevDiff, nextDiff; + u32 diff; + u16 factor; + + if (*prevPixel == *curPixel && *nextPixel == *curPixel) + return *curPixel; + + red = (*curPixel >> 0) & 0x1F; + green = (*curPixel >> 5) & 0x1F; + blue = (*curPixel >> 10) & 0x1F; + + prevAvg = (((*prevPixel >> 0) & 0x1F) + ((*prevPixel >> 5) & 0x1F) + ((*prevPixel >> 10) & 0x1F)) / 3; + curAvg = (((*curPixel >> 0) & 0x1F) + ((*curPixel >> 5) & 0x1F) + ((*curPixel >> 10) & 0x1F)) / 3; + nextAvg = (((*nextPixel >> 0) & 0x1F) + ((*nextPixel >> 5) & 0x1F) + ((*nextPixel >> 10) & 0x1F)) / 3; + + if (prevAvg == curAvg && nextAvg == curAvg) + return *curPixel; + + if (prevAvg > curAvg) + prevDiff = prevAvg - curAvg; + else + prevDiff = curAvg - prevAvg; + + if (nextAvg > curAvg) + nextDiff = nextAvg - curAvg; + else + nextDiff = curAvg - nextAvg; + + if (prevDiff >= nextDiff) + diff = prevDiff; + else + diff = nextDiff; + + factor = 31 - diff / 2; + red = (red * factor) / 31; + green = (green * factor) / 31; + blue = (blue * factor) / 31; + return RGB2(red, green, blue); +} + +static u16 QuantizePixel_BlurHard(u16 *prevPixel, u16 *curPixel, u16 *nextPixel) +{ + u16 red, green, blue; + u16 prevAvg, curAvg, nextAvg; + u16 prevDiff, nextDiff; + u32 diff; + u16 factor; + + if (*prevPixel == *curPixel && *nextPixel == *curPixel) + return *curPixel; + + red = (*curPixel >> 0) & 0x1F; + green = (*curPixel >> 5) & 0x1F; + blue = (*curPixel >> 10) & 0x1F; + + prevAvg = (((*prevPixel >> 0) & 0x1F) + ((*prevPixel >> 5) & 0x1F) + ((*prevPixel >> 10) & 0x1F)) / 3; + curAvg = (((*curPixel >> 0) & 0x1F) + ((*curPixel >> 5) & 0x1F) + ((*curPixel >> 10) & 0x1F)) / 3; + nextAvg = (((*nextPixel >> 0) & 0x1F) + ((*nextPixel >> 5) & 0x1F) + ((*nextPixel >> 10) & 0x1F)) / 3; + + if (prevAvg == curAvg && nextAvg == curAvg) + return *curPixel; + + if (prevAvg > curAvg) + prevDiff = prevAvg - curAvg; + else + prevDiff = curAvg - prevAvg; + + if (nextAvg > curAvg) + nextDiff = nextAvg - curAvg; + else + nextDiff = curAvg - nextAvg; + + if (prevDiff >= nextDiff) + diff = prevDiff; + else + diff = nextDiff; + + factor = 31 - diff; + red = (red * factor) / 31; + green = (green * factor) / 31; + blue = (blue * factor) / 31; + return RGB2(red, green, blue); +} + +void ConvertImageProcessingToGBA(struct ImageProcessingContext *context) +{ + u16 i, j, k; + u16 *src, *dest, *src_, *dest_; + u16 width, height; + + width = context->canvasWidth >> 3; + height = context->canvasHeight >> 3; + src_ = context->canvasPixels; + dest_ = context->dest; + + if (context->var_16 == 2) + { + for (i = 0; i < height; i++) + { + for (j = 0; j < width; j++) + { + for (k = 0; k < 8; k++) + { + dest = dest_ + ((i * width + j) << 5) + (k << 2); + src = src_ + ((((i << 3) + k) << 3) * width) + (j << 3); + + dest[0] = src[0] | (src[1] << 8); + dest[1] = src[2] | (src[3] << 8); + dest[2] = src[4] | (src[5] << 8); + dest[3] = src[6] | (src[7] << 8); + } + } + } + } + else + { + for (i = 0; i < height; i++) + { + for (j = 0; j < width; j++) + { + for (k = 0; k < 8; k++) + { + dest = dest_ + ((i * width + j) << 4) + (k << 1); + src = src_ + ((((i << 3) + k) << 3) * width) + (j << 3); + + dest[0] = src[0] | (src[1] << 4) | (src[2] << 8) | (src[3] << 0xC); + dest[1] = src[4] | (src[5] << 4) | (src[6] << 8) | (src[7] << 0xC); + } + } + } + } +} + +void ApplyImageProcessingQuantization(struct ImageProcessingContext *context) +{ + gCanvasPaletteStart = context->paletteStart * 16; + gCanvasPalette = &context->canvasPalette[gCanvasPaletteStart]; + gCanvasPixels = context->canvasPixels; + gCanvasColumnStart = context->columnStart; + gCanvasRowStart = context->rowStart; + gCanvasColumnEnd = context->columnEnd; + gCanvasRowEnd = context->rowEnd; + gCanvasWidth = context->canvasWidth; + gCanvasHeight = context->canvasHeight; + + switch (context->quantizeEffect) + { + case QUANTIZE_EFFECT_STANDARD: + QuantizePalette_Standard(FALSE); + break; + case QUANTIZE_EFFECT_STANDARD_LIMITED_COLORS: + QuantizePalette_Standard(TRUE); + break; + case QUANTIZE_EFFECT_PRIMARY_COLORS: + SetPresetPalette_PrimaryColors(); + QuantizePalette_PrimaryColors(); + break; + case QUANTIZE_EFFECT_GRAYSCALE: + SetPresetPalette_Grayscale(); + QuantizePalette_Grayscale(); + break; + case QUANTIZE_EFFECT_GRAYSCALE_SMALL: + SetPresetPalette_GrayscaleSmall(); + QuantizePalette_GrayscaleSmall(); + break; + case QUANTIZE_EFFECT_BLACK_WHITE: + SetPresetPalette_BlackAndWhite(); + QuantizePalette_BlackAndWhite(); + break; + } +} + +static void SetPresetPalette_PrimaryColors(void) +{ + gCanvasPalette[0] = RGB2(0, 0, 0); + gCanvasPalette[1] = RGB2(6, 6, 6); + gCanvasPalette[2] = RGB2(29, 29, 29); + gCanvasPalette[3] = RGB2(11, 11, 11); + gCanvasPalette[4] = RGB2(29, 6, 6); + gCanvasPalette[5] = RGB2(6, 29, 6); + gCanvasPalette[6] = RGB2(6, 6, 29); + gCanvasPalette[7] = RGB2(29, 29, 6); + gCanvasPalette[8] = RGB2(29, 6, 29); + gCanvasPalette[9] = RGB2(6, 29, 29); + gCanvasPalette[10] = RGB2(29, 11, 6); + gCanvasPalette[11] = RGB2(11, 29, 6); + gCanvasPalette[12] = RGB2(6, 11, 29); + gCanvasPalette[13] = RGB2(29, 6, 11); + gCanvasPalette[14] = RGB2(6, 29, 11); + gCanvasPalette[15] = RGB2(11, 6, 29); +} + +static void SetPresetPalette_BlackAndWhite(void) +{ + gCanvasPalette[0] = RGB2(0, 0, 0); + gCanvasPalette[1] = RGB2(0, 0, 0); + gCanvasPalette[2] = RGB2(31, 31, 31); +} + +static void SetPresetPalette_GrayscaleSmall(void) +{ + u8 i; + + gCanvasPalette[0] = RGB2(0, 0, 0); + gCanvasPalette[1] = RGB2(0, 0, 0); + for (i = 0; i < 14; i++) + gCanvasPalette[i + 2] = RGB2(2 * (i + 2), 2 * (i + 2), 2 * (i + 2)); +} + +static void SetPresetPalette_Grayscale(void) +{ + u8 i; + + gCanvasPalette[0] = RGB2(0, 0, 0); + for (i = 0; i < 32; i++) + gCanvasPalette[i + 1] = RGB2(i, i, i); +} + +static void QuantizePalette_Standard(bool8 useLimitedPalette) +{ + u8 i, j; + u16 maxIndex; + + maxIndex = 0xDF; + if (!useLimitedPalette) + maxIndex = 0xFF; + + for (i = 0; i < maxIndex; i++) + gCanvasPalette[i] = RGB_BLACK; + + gCanvasPalette[maxIndex] = RGB2(15, 15, 15); + for (j = 0; j < gCanvasRowEnd; j++) + { + u16 *pixelRow = &(*gCanvasPixels)[0][(gCanvasRowStart + j) * gCanvasWidth]; + u16 *pixel = &pixelRow[gCanvasColumnStart]; + for (i = 0; i < gCanvasColumnEnd; i++, pixel++) + { + if (*pixel & 0x8000) + { + *pixel = gCanvasPaletteStart; + } + else + { + u16 quantizedColor = QuantizePixel_Standard(pixel); + u8 curIndex = 1; + if (curIndex < maxIndex) + { + if (gCanvasPalette[curIndex] == RGB_BLACK) + { + // The quantized color does not match any existing color in the + // palette, so we add it to the palette. + // This if block seems pointless because the below while loop handles + // this same logic. + gCanvasPalette[curIndex] = quantizedColor; + *pixel = gCanvasPaletteStart + curIndex; + } + else + { + while (curIndex < maxIndex) + { + if (gCanvasPalette[curIndex] == RGB_BLACK) + { + // The quantized color does not match any existing color in the + // palette, so we add it to the palette. + gCanvasPalette[curIndex] = quantizedColor; + *pixel = gCanvasPaletteStart + curIndex; + break; + } + + if (gCanvasPalette[curIndex] == quantizedColor) + { + // The quantized color matches this existing color in the + // palette, so we use this existing color for the pixel. + *pixel = gCanvasPaletteStart + curIndex; + break; + } + + curIndex++; + } + } + } + + if (curIndex == maxIndex) + { + // The entire palette's colors are already in use, which means + // the base image has too many colors to handle. This error is handled + // by marking such pixels as gray color. + curIndex = maxIndex; + *pixel = curIndex; + } + } + } + } +} + +static void QuantizePalette_BlackAndWhite(void) +{ + u8 i, j; + + for (j = 0; j < gCanvasRowEnd; j++) + { + u16 *pixelRow = &(*gCanvasPixels)[0][(gCanvasRowStart + j) * gCanvasWidth]; + u16 *pixel = &pixelRow[gCanvasColumnStart]; + for (i = 0; i < gCanvasColumnEnd; i++, pixel++) + { + if (*pixel & 0x8000) + { + *pixel = gCanvasPaletteStart; + } + else + { + if (QuantizePixel_BlackAndWhite(pixel) == RGB_BLACK) + { + // Black is the first color in the quantized palette. + *pixel = gCanvasPaletteStart + 1; + } + else + { + // White is the second color in the quantized palette. + *pixel = gCanvasPaletteStart + 2; + } + } + } + } +} + +static void QuantizePalette_GrayscaleSmall(void) +{ + u8 i, j; + + for (j = 0; j < gCanvasRowEnd; j++) + { + u16 *pixelRow = &(*gCanvasPixels)[0][(gCanvasRowStart + j) * gCanvasWidth]; + u16 *pixel = &pixelRow[gCanvasColumnStart]; + for (i = 0; i < gCanvasColumnEnd; i++, pixel++) + { + if (*pixel & 0x8000) + *pixel = gCanvasPaletteStart; + else + *pixel = QuantizePixel_GrayscaleSmall(pixel) + gCanvasPaletteStart; + } + } +} + +static void QuantizePalette_Grayscale(void) +{ + u8 i, j; + + for (j = 0; j < gCanvasRowEnd; j++) + { + u16 *pixelRow = &(*gCanvasPixels)[0][(gCanvasRowStart + j) * gCanvasWidth]; + u16 *pixel = &pixelRow[gCanvasColumnStart]; + for (i = 0; i < gCanvasColumnEnd; i++, pixel++) + { + if (*pixel & 0x8000) + *pixel = gCanvasPaletteStart; + else + *pixel = QuantizePixel_Grayscale(pixel) + gCanvasPaletteStart; + } + } +} + +static void QuantizePalette_PrimaryColors(void) +{ + u8 i, j; + + for (j = 0; j < gCanvasRowEnd; j++) + { + u16 *pixelRow = &(*gCanvasPixels)[0][(gCanvasRowStart + j) * gCanvasWidth]; + u16 *pixel = &pixelRow[gCanvasColumnStart]; + for (i = 0; i < gCanvasColumnEnd; i++, pixel++) + { + if (*pixel & 0x8000) + *pixel = gCanvasPaletteStart; + else + *pixel = QuantizePixel_PrimaryColors(pixel) + gCanvasPaletteStart; + } + } +} + +// Quantizes the pixel's color channels to nearest multiple of 4, and clamps to [6, 30]. +static u16 QuantizePixel_Standard(u16 *pixel) +{ + u16 red = *pixel & 0x1F; + u16 green = (*pixel >> 5) & 0x1F; + u16 blue = (*pixel >> 10) & 0x1F; + + // Quantize color channels to muliples of 4, rounding up. + if (red & 3) + red = (red & 0x1C) + 4; + if (green & 3) + green = (green & 0x1C) + 4; + if (blue & 3) + blue = (blue & 0x1C) + 4; + + // Clamp channels to [6, 30]. + if (red < 6) + red = 6; + if (red > 30) + red = 30; + if (green < 6) + green = 6; + if (green > 30) + green = 30; + if (blue < 6) + blue = 6; + if (blue > 30) + blue = 30; + + return RGB2(red, green, blue); +} + +static u16 QuantizePixel_PrimaryColors(u16* color) +{ + u16 red = *color & 0x1F; + u16 green = (*color >> 5) & 0x1F; + u16 blue = (*color >> 10) & 0x1F; + + if (red < 12 && green < 11 && blue < 11) + return 1; + + if (red > 19 && green > 19 && blue > 19) + return 2; + + if (red > 19) + { + if (green > 19) + { + if (blue > 14) + return 2; + else + return 7; + } + else if (blue > 19) + { + if (green > 14) + return 2; + else + return 8; + } + } + + if (green > 19 && blue > 19) + { + if (red > 14) + return 2; + else + return 9; + } + + if (red > 19) + { + if (green > 11) + { + if (blue > 11) + { + if (green < blue) + return 8; + else + return 7; + } + else + { + return 10; + } + } + else if (blue > 11) + { + return 13; + } + else + { + return 4; + } + } + + if (green > 19) + { + if (red > 11) + { + if (blue > 11) + { + if (red < blue) + return 9; + else + return 7; + } + else + { + return 11; + } + } + else + { + if (blue > 11) + return 14; + else + return 5; + } + } + + if (blue > 19) + { + if (red > 11) + { + if (green > 11) + { + if (red < green) + return 9; + else + return 8; + } + } + else if (green > 11) + { + return 12; + } + + if (blue > 11) + return 15; + else + return 6; + } + + return 3; +} + +static u16 QuantizePixel_GrayscaleSmall(u16 *color) +{ + u16 red = *color & 0x1F; + u16 green = (*color >> 5) & 0x1F; + u16 blue = (*color >> 10) & 0x1F; + u16 average = ((red + green + blue) / 3) & 0x1E; + if (average == 0) + return 1; + else + return average / 2; +} + +static u16 QuantizePixel_Grayscale(u16 *color) +{ + u16 red = *color & 0x1F; + u16 green = (*color >> 5) & 0x1F; + u16 blue = (*color >> 10) & 0x1F; + u16 average = (red + green + blue) / 3; + return average + 1; +} |