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pixform.h
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pixform.h
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/*****************************************************************************\
Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
This file is licensed under the Snes9x License.
For further information, consult the LICENSE file in the root directory.
\*****************************************************************************/
#ifndef _PIXFORM_H_
#define _PIXFORM_H_
/* RGB565 format */
#define BUILD_PIXEL_RGB565(R, G, B) (((int)(R) << 11) | ((int)(G) << 6) | (((int)(G) & 0x10) << 1) | (int)(B))
#define BUILD_PIXEL2_RGB565(R, G, B) (((int)(R) << 11) | ((int)(G) << 5) | (int)(B))
#define DECOMPOSE_PIXEL_RGB565(PIX, R, G, B) \
{ \
(R) = (PIX) >> 11; \
(G) = ((PIX) >> 6) & 0x1f; \
(B) = (PIX)&0x1f; \
}
#define SPARE_RGB_BIT_MASK_RGB565 (1 << 5)
#define MAX_RED_RGB565 31
#define MAX_GREEN_RGB565 63
#define MAX_BLUE_RGB565 31
#define RED_SHIFT_BITS_RGB565 11
#define GREEN_SHIFT_BITS_RGB565 6
#define RED_LOW_BIT_MASK_RGB565 0x0800
#define GREEN_LOW_BIT_MASK_RGB565 0x0020
#define BLUE_LOW_BIT_MASK_RGB565 0x0001
#define RED_HI_BIT_MASK_RGB565 0x8000
#define GREEN_HI_BIT_MASK_RGB565 0x0400
#define BLUE_HI_BIT_MASK_RGB565 0x0010
#define FIRST_COLOR_MASK_RGB565 0xF800
#define SECOND_COLOR_MASK_RGB565 0x07E0
#define THIRD_COLOR_MASK_RGB565 0x001F
#define ALPHA_BITS_MASK_RGB565 0x0000
/* RGB555 format */
#define BUILD_PIXEL_RGB555(R, G, B) (((int)(R) << 10) | ((int)(G) << 5) | (int)(B))
#define BUILD_PIXEL2_RGB555(R, G, B) (((int)(R) << 10) | ((int)(G) << 5) | (int)(B))
#define DECOMPOSE_PIXEL_RGB555(PIX, R, G, B) \
{ \
(R) = (PIX) >> 10; \
(G) = ((PIX) >> 5) & 0x1f; \
(B) = (PIX)&0x1f; \
}
#define SPARE_RGB_BIT_MASK_RGB555 (1 << 15)
#define MAX_RED_RGB555 31
#define MAX_GREEN_RGB555 31
#define MAX_BLUE_RGB555 31
#define RED_SHIFT_BITS_RGB555 10
#define GREEN_SHIFT_BITS_RGB555 5
#define RED_LOW_BIT_MASK_RGB555 0x0400
#define GREEN_LOW_BIT_MASK_RGB555 0x0020
#define BLUE_LOW_BIT_MASK_RGB555 0x0001
#define RED_HI_BIT_MASK_RGB555 0x4000
#define GREEN_HI_BIT_MASK_RGB555 0x0200
#define BLUE_HI_BIT_MASK_RGB555 0x0010
#define FIRST_COLOR_MASK_RGB555 0x7C00
#define SECOND_COLOR_MASK_RGB555 0x03E0
#define THIRD_COLOR_MASK_RGB555 0x001F
#define ALPHA_BITS_MASK_RGB555 0x0000
#define CONCAT(X, Y) X##Y
// C pre-processor needs a two stage macro define to enable it to concat
// to macro names together to form the name of another macro.
#define BUILD_PIXEL_D(F, R, G, B) CONCAT(BUILD_PIXEL_, F) (R, G, B)
#define BUILD_PIXEL2_D(F, R, G, B) CONCAT(BUILD_PIXEL2_, F) (R, G, B)
#define DECOMPOSE_PIXEL_D(F, PIX, R, G, B) CONCAT(DECOMPOSE_PIXEL_, F) (PIX, R, G, B)
#define BUILD_PIXEL(R, G, B) BUILD_PIXEL_D(PIXEL_FORMAT, R, G, B)
#define BUILD_PIXEL2(R, G, B) BUILD_PIXEL2_D(PIXEL_FORMAT, R, G, B)
#define DECOMPOSE_PIXEL(PIX, R, G, B) DECOMPOSE_PIXEL_D(PIXEL_FORMAT, PIX, R, G, B)
#define MAX_RED_D(F) CONCAT(MAX_RED_, F)
#define MAX_GREEN_D(F) CONCAT(MAX_GREEN_, F)
#define MAX_BLUE_D(F) CONCAT(MAX_BLUE_, F)
#define RED_SHIFT_BITS_D(F) CONCAT(RED_SHIFT_BITS_, F)
#define GREEN_SHIFT_BITS_D(F) CONCAT(GREEN_SHIFT_BITS_, F)
#define RED_LOW_BIT_MASK_D(F) CONCAT(RED_LOW_BIT_MASK_, F)
#define GREEN_LOW_BIT_MASK_D(F) CONCAT(GREEN_LOW_BIT_MASK_, F)
#define BLUE_LOW_BIT_MASK_D(F) CONCAT(BLUE_LOW_BIT_MASK_, F)
#define RED_HI_BIT_MASK_D(F) CONCAT(RED_HI_BIT_MASK_, F)
#define GREEN_HI_BIT_MASK_D(F) CONCAT(GREEN_HI_BIT_MASK_, F)
#define BLUE_HI_BIT_MASK_D(F) CONCAT(BLUE_HI_BIT_MASK_, F)
#define FIRST_COLOR_MASK_D(F) CONCAT(FIRST_COLOR_MASK_, F)
#define SECOND_COLOR_MASK_D(F) CONCAT(SECOND_COLOR_MASK_, F)
#define THIRD_COLOR_MASK_D(F) CONCAT(THIRD_COLOR_MASK_, F)
#define ALPHA_BITS_MASK_D(F) CONCAT(ALPHA_BITS_MASK_, F)
#define MAX_RED MAX_RED_D(PIXEL_FORMAT)
#define MAX_GREEN MAX_GREEN_D(PIXEL_FORMAT)
#define MAX_BLUE MAX_BLUE_D(PIXEL_FORMAT)
#define RED_SHIFT_BITS RED_SHIFT_BITS_D(PIXEL_FORMAT)
#define GREEN_SHIFT_BITS GREEN_SHIFT_BITS_D(PIXEL_FORMAT)
#define RED_LOW_BIT_MASK RED_LOW_BIT_MASK_D(PIXEL_FORMAT)
#define GREEN_LOW_BIT_MASK GREEN_LOW_BIT_MASK_D(PIXEL_FORMAT)
#define BLUE_LOW_BIT_MASK BLUE_LOW_BIT_MASK_D(PIXEL_FORMAT)
#define RED_HI_BIT_MASK RED_HI_BIT_MASK_D(PIXEL_FORMAT)
#define GREEN_HI_BIT_MASK GREEN_HI_BIT_MASK_D(PIXEL_FORMAT)
#define BLUE_HI_BIT_MASK BLUE_HI_BIT_MASK_D(PIXEL_FORMAT)
#define FIRST_COLOR_MASK FIRST_COLOR_MASK_D(PIXEL_FORMAT)
#define SECOND_COLOR_MASK SECOND_COLOR_MASK_D(PIXEL_FORMAT)
#define THIRD_COLOR_MASK THIRD_COLOR_MASK_D(PIXEL_FORMAT)
#define ALPHA_BITS_MASK ALPHA_BITS_MASK_D(PIXEL_FORMAT)
#define GREEN_HI_BIT ((MAX_GREEN + 1) >> 1)
#define RGB_LOW_BITS_MASK (RED_LOW_BIT_MASK | GREEN_LOW_BIT_MASK | BLUE_LOW_BIT_MASK)
#define RGB_HI_BITS_MASK (RED_HI_BIT_MASK | GREEN_HI_BIT_MASK | BLUE_HI_BIT_MASK)
#define RGB_HI_BITS_MASKx2 ((RED_HI_BIT_MASK | GREEN_HI_BIT_MASK | BLUE_HI_BIT_MASK) << 1)
#define RGB_REMOVE_LOW_BITS_MASK (~RGB_LOW_BITS_MASK)
#define FIRST_THIRD_COLOR_MASK (FIRST_COLOR_MASK | THIRD_COLOR_MASK)
#define TWO_LOW_BITS_MASK (RGB_LOW_BITS_MASK | (RGB_LOW_BITS_MASK << 1))
#define HIGH_BITS_SHIFTED_TWO_MASK (((FIRST_COLOR_MASK | SECOND_COLOR_MASK | THIRD_COLOR_MASK) & ~TWO_LOW_BITS_MASK) >> 2)
#endif // _PIXFORM_H_