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blitbuffer.c
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blitbuffer.c
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/*
KOReader: blitbuffer implementation for jit-disabled platforms
Copyright (C) 2011 Hans-Werner Hilse <[email protected]>
2017 Huang Xin <[email protected]>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "blitbuffer.h"
#define MASK_INVERSE 0x02
#define SHIFT_INVERSE 1
#define MASK_ROTATED 0x0C
#define SHIFT_ROTATED 2
#define MASK_TYPE 0xF0
#define SHIFT_TYPE 4
#define TYPE_BB4 0
#define TYPE_BB8 1
#define TYPE_BB8A 2
#define TYPE_BBRGB16 3
#define TYPE_BBRGB24 4
#define TYPE_BBRGB32 5
static const char*
get_bbtype_name(int bbtype)
{
switch (bbtype) {
case TYPE_BB4:
return "BB4";
case TYPE_BB8:
return "BB8";
case TYPE_BB8A:
return "BB8A";
case TYPE_BBRGB16:
return "BBRGB16";
case TYPE_BBRGB24:
return "BBRGB24";
case TYPE_BBRGB32:
return "BBRGB32";
default:
return "Unknown!";
}
}
#define GET_BB_INVERSE(bb) ((MASK_INVERSE & bb->config) >> SHIFT_INVERSE)
#define GET_BB_ROTATION(bb) ((MASK_ROTATED & bb->config) >> SHIFT_ROTATED)
#define GET_BB_TYPE(bb) (((MASK_TYPE & bb->config) >> SHIFT_TYPE))
#define ColorRGB32_To_Color8(color) \
(Color8){(4898U*color->r + 9618U*color->g + 1869U*color->b) >> 14U}
#define ColorRGB32_To_Color8A(color) \
(Color8A){(4898U*color->r + 9618U*color->g + 1869U*color->b) >> 14U, color->alpha}
#define ColorRGB32_To_Color16(color) \
(ColorRGB16){((color->r & 0xF8) << 8U) + ((color->g & 0xFC) << 3U) + ((color->b >> 3U))}
#define ColorRGB32_To_Color24(color) \
(ColorRGB24){color->r, color->g, color->b}
#define Color8A_To_Color8(color) \
(Color8){color->a}
#define Color8A_To_Color24(color) \
(ColorRGB24){color->a, color->a, color->a}
#define Color8A_To_Color16(color) \
(ColorRGB16){((color->a & 0xF8) << 8U) + ((color->a & 0xFC) << 3U) + ((color->a >> 3U))}
#define Color8A_To_Color32(color) \
(ColorRGB32){color->a, color->a, color->a, color->alpha}
#define ColorRGB16_GetR(v) (((v >> 11U) << 3U) + ((v >> 11U) >> 2U))
#define ColorRGB16_GetG(v) ((((v >> 5U) & 0x3F) << 2U) + (((v >> 5U) & 0x3F) >> 4U))
#define ColorRGB16_GetB(v) (((v & 0x001F) << 3U) + ((v & 0x001F) >> 2U))
#define ColorRGB16_To_A(v) \
((39919*ColorRGB16_GetR(v) + \
39185*ColorRGB16_GetG(v) + \
15220*ColorRGB16_GetB(v)) >> 14U)
#define RGB_To_RGB16(r, g, b) (((r & 0xF8) << 8U) + ((g & 0xFC) << 3U) + (b >> 3U))
#define RGB_To_A(r, g, b) ((4898U*r + 9618U*g + 1869U*b) >> 14U)
// __auto_type was introduced in GCC 4.9 (and Clang ~3.8)...
// NOTE: Inspired from glibc's __GNUC_PREREQ && __glibc_clang_prereq macros (from <features.h>),
// which we of course can't use because some of our TCs use a glibc version old enough not to have the clang one...
#if (defined(__clang__) && (__clang_major__ > 3 || (__clang_major__ == 3 && __clang_minor__ >= 8))) || \
((defined(__GNUC__) && !defined(__clang__)) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 9)))
//#warning "Auto Type :)"
#define DIV_255(V) \
({ \
__auto_type _v = (V) + 128; \
(((_v >> 8U) + _v) >> 8U); \
})
#else
#warning "TypeOf :("
#define DIV_255(V) \
({ \
typeof (V) _v = (V) + 128; \
(((_v >> 8U) + _v) >> 8U); \
})
#endif
// NOTE: See Pillow's transpose operations, or Qt5 qMemRotate stuff for cache-efficient ways of rotating an image data buffer,
// instead of handling the rotation per-pixel, at plotting time.
// I have no idea if it'd be an efficient method here, since it requires an extra buffer in which to do the rotation,
// just so that new buffer can be used for the memcpy-based fast paths...
#define BB_GET_PIXEL(bb, rotation, COLOR, x, y, pptr) \
({ \
if (rotation == 0) { \
*pptr = (COLOR*)(bb->data + y * bb->stride) + x; \
} else if (rotation == 1) { \
*pptr = (COLOR*)(bb->data + x * bb->stride) + bb->w - y - 1; \
} else if (rotation == 2) { \
*pptr = (COLOR*)(bb->data + (bb->h - y - 1) * bb->stride) + bb->w - x - 1; \
} else if (rotation == 3) { \
*pptr = (COLOR*)(bb->data + (bb->h - x - 1) * bb->stride) + y; \
} \
})
#define SET_ALPHA_FROM_A(bb, bb_type, bb_rotation, x, y, alpha) \
({ \
if (bb_type == TYPE_BB8) { \
Color8 *srcptr; \
BB_GET_PIXEL(bb, bb_rotation, Color8, x, y, &srcptr); \
*alpha = srcptr->a; \
} else if (bb_type == TYPE_BB8A) { \
Color8A *srcptr; \
BB_GET_PIXEL(bb, bb_rotation, Color8A, x, y, &srcptr); \
*alpha = srcptr->a; \
} else if (bb_type == TYPE_BBRGB16) { \
ColorRGB16 *srcptr; \
BB_GET_PIXEL(bb, bb_rotation, ColorRGB16, x, y, &srcptr); \
*alpha = ColorRGB16_To_A(srcptr->v); \
} else if (bb_type == TYPE_BBRGB24) { \
ColorRGB24 *srcptr; \
BB_GET_PIXEL(bb, bb_rotation, ColorRGB24, x, y, &srcptr); \
*alpha = RGB_To_A(srcptr->r, srcptr->g, srcptr->b); \
} else if (bb_type == TYPE_BBRGB32) { \
ColorRGB32 *srcptr; \
BB_GET_PIXEL(bb, bb_rotation, ColorRGB32, x, y, &srcptr); \
*alpha = RGB_To_A(srcptr->r, srcptr->g, srcptr->b); \
} \
})
void BB_fill_rect(BlitBuffer *bb, int x, int y, int w, int h, uint8_t v) {
int rotation = GET_BB_ROTATION(bb);
int rx, ry, rw, rh;
// Compute rotated rectangle coordinates & size
switch (rotation) {
case 0:
rx = x;
ry = y;
rw = w;
rh = h;
break;
case 1:
rx = bb->w - (y + h);
ry = x;
rw = h;
rh = w;
break;
case 2:
rx = bb->w - (x + w);
ry = bb->h - (y + h);
rw = w;
rh = h;
break;
case 3:
rx = y;
ry = bb->h - (x + w);
rw = h;
rh = w;
break;
}
// Handle any target pitch properly (i.e., fetch the amount of bytes taken per pixel)...
int bb_type = GET_BB_TYPE(bb);
uint8_t bpp = 1;
switch (bb_type) {
case TYPE_BB8:
bpp = 1;
break;
case TYPE_BB8A:
bpp = 2;
break;
case TYPE_BBRGB16:
bpp = 2;
break;
case TYPE_BBRGB24:
bpp = 3;
break;
case TYPE_BBRGB32:
bpp = 4;
break;
}
if (rx == 0 && rw == bb->w) {
// Single step for contiguous scanlines
//fprintf(stdout, "%s: Single fill paintRect\n", __FUNCTION__);
uint8_t *p = bb->data + bb->stride*ry;
memset(p, v, bb->stride*rh);
} else {
// Scanline per scanline fill
//fprintf(stdout, "%s: Scanline fill paintRect\n", __FUNCTION__);
uint8_t *p = bb->data;
int j;
for (j = ry; j < ry+rh; j++) {
p = bb->data + bb->stride*j + bpp*rx;
memset(p, v, bpp*rw);
}
}
}
void BB_blend_rect(BlitBuffer *bb, int x, int y, int w, int h, Color8A *color) {
int i, j;
uint8_t r, g, b;
int bb_type = GET_BB_TYPE(bb);
int bb_rotation = GET_BB_ROTATION(bb);
uint8_t alpha = color->alpha;
uint8_t ainv = alpha ^ 0xFF;
switch (bb_type) {
case TYPE_BB8:
{
Color8 *dstptr;
for (j = y; j < y + h; j++) {
for (i = x; i < x + w; i++) {
BB_GET_PIXEL(bb, bb_rotation, Color8, i, j, &dstptr);
dstptr->a = DIV_255(dstptr->a * ainv + color->a * alpha);
}
}
}
break;
case TYPE_BB8A:
{
Color8A *dstptr;
for (j = y; j < y + h; j++) {
for (i = x; i < x + w; i++) {
BB_GET_PIXEL(bb, bb_rotation, Color8A, i, j, &dstptr);
dstptr->a = DIV_255(dstptr->a * ainv + color->a * alpha);
}
}
}
break;
case TYPE_BBRGB16:
{
ColorRGB16 *dstptr;
for (j = y; j < y + h; j++) {
for (i = x; i < x + w; i++) {
BB_GET_PIXEL(bb, bb_rotation, ColorRGB16, i, j, &dstptr);
r = DIV_255(ColorRGB16_GetR(dstptr->v) * ainv + color->a * alpha);
g = DIV_255(ColorRGB16_GetG(dstptr->v) * ainv + color->a * alpha);
b = DIV_255(ColorRGB16_GetB(dstptr->v) * ainv + color->a * alpha);
dstptr->v = RGB_To_RGB16(r, g, b);
}
}
}
break;
case TYPE_BBRGB24:
{
ColorRGB24 *dstptr;
for (j = y; j < y + h; j++) {
for (i = x; i < x + w; i++) {
BB_GET_PIXEL(bb, bb_rotation, ColorRGB24, i, j, &dstptr);
dstptr->r = DIV_255(dstptr->r * ainv + color->a * alpha);
dstptr->g = DIV_255(dstptr->g * ainv + color->a * alpha);
dstptr->b = DIV_255(dstptr->b * ainv + color->a * alpha);
}
}
}
break;
case TYPE_BBRGB32:
{
ColorRGB32 *dstptr;
for (j = y; j < y + h; j++) {
for (i = x; i < x + w; i++) {
BB_GET_PIXEL(bb, bb_rotation, ColorRGB32, i, j, &dstptr);
dstptr->r = DIV_255(dstptr->r * ainv + color->a * alpha);
dstptr->g = DIV_255(dstptr->g * ainv + color->a * alpha);
dstptr->b = DIV_255(dstptr->b * ainv + color->a * alpha);
}
}
}
break;
}
}
void BB_invert_rect(BlitBuffer *bb, int x, int y, int w, int h) {
int rotation = GET_BB_ROTATION(bb);
int rx, ry, rw, rh;
int i, j;
// Compute rotated rectangle coordinates & size
switch (rotation) {
case 0:
rx = x;
ry = y;
rw = w;
rh = h;
break;
case 1:
rx = bb->w - (y + h);
ry = x;
rw = h;
rh = w;
break;
case 2:
rx = bb->w - (x + w);
ry = bb->h - (y + h);
rw = w;
rh = h;
break;
case 3:
rx = y;
ry = bb->h - (x + w);
rw = h;
rh = w;
break;
}
// Handle any target pitch properly
int bb_type = GET_BB_TYPE(bb);
switch (bb_type) {
case TYPE_BB8:
{
if (rx == 0 && rw == bb->w) {
// Single step for contiguous scanlines
//fprintf(stdout, "%s: Full BB8 invertRect\n", __FUNCTION__);
uint8_t *p = bb->data + bb->stride*ry;
for (i = 0; i < bb->pixel_stride*rh; i++) {
p[i] ^= 0xFF;
}
} else {
// Pixel per pixel
//fprintf(stdout, "%s: Pixel BB8 invertRect\n", __FUNCTION__);
uint8_t *p;
for (j = ry; j < ry+rh; j++) {
p = bb->data + bb->stride*j + rx;
for (i = 0; i < rw; i++) {
p[i] ^= 0xFF;
}
}
}
}
break;
case TYPE_BB8A:
{
if (rx == 0 && rw == bb->w) {
// Single step for contiguous scanlines
//fprintf(stdout, "%s: Full BB8A invertRect\n", __FUNCTION__);
uint16_t *p = (uint16_t*) (bb->data + bb->stride*ry);
for (i = 0; i < bb->pixel_stride*rh; i++) {
p[i] ^= 0x00FF;
}
} else {
// Pixel per pixel
//fprintf(stdout, "%s: Pixel BB8A invertRect\n", __FUNCTION__);
uint16_t *p;
for (j = ry; j < ry+rh; j++) {
p = (uint16_t*) (bb->data + bb->stride*j + (rx << 1));
for (i = 0; i < rw; i++) {
p[i] ^= 0x00FF;
}
}
}
}
break;
case TYPE_BBRGB16:
{
if (rx == 0 && rw == bb->w) {
// Single step for contiguous scanlines
//fprintf(stdout, "%s: Full BBRGB16 invertRect\n", __FUNCTION__);
uint16_t *p = (uint16_t*) (bb->data + bb->stride*ry);
for (i = 0; i < bb->pixel_stride*rh; i++) {
p[i] ^= 0xFFFF;
}
} else {
// Pixel per pixel
//fprintf(stdout, "%s: Pixel BBRGB16 invertRect\n", __FUNCTION__);
uint16_t *p;
for (j = ry; j < ry+rh; j++) {
p = (uint16_t*) (bb->data + bb->stride*j + (rx << 1));
for (i = 0; i < rw; i++) {
p[i] ^= 0xFFFF;
}
}
}
}
break;
case TYPE_BBRGB24:
{
if (rx == 0 && rw == bb->w) {
// Single step for contiguous scanlines
//fprintf(stdout, "%s: Full BBRGB24 invertRect\n", __FUNCTION__);
uint8_t *p = bb->data + bb->stride*ry;
for (i = 0; i < bb->pixel_stride*rh; i+=3) {
p[i] ^= 0xFF;
p[i+1] ^= 0xFF;
p[i+2] ^= 0xFF;
}
} else {
// Pixel per pixel
//fprintf(stdout, "%s: Pixel BBRGB24 invertRect\n", __FUNCTION__);
uint8_t *p;
for (j = ry; j < ry+rh; j++) {
p = bb->data + bb->stride*j + (rx * 3);
for (i = 0; i < rw; i+=3) {
p[i] ^= 0xFF;
p[i+1] ^= 0xFF;
p[i+2] ^= 0xFF;
}
}
}
}
break;
case TYPE_BBRGB32:
{
if (rx == 0 && rw == bb->w) {
// Single step for contiguous scanlines
//fprintf(stdout, "%s: Full BBRGB32 invertRect\n", __FUNCTION__);
uint32_t *p = (uint32_t*) (bb->data + bb->stride*ry);
for (i = 0; i < bb->pixel_stride*rh; i++) {
p[i] ^= 0x00FFFFFF;
}
} else {
// Pixel per pixel
//fprintf(stdout, "%s: Pixel BBRGB32 invertRect\n", __FUNCTION__);
uint32_t *p;
for (j = ry; j < ry+rh; j++) {
p = (uint32_t*) (bb->data + bb->stride*j + (rx << 2));
for (i = 0; i < rw; i++) {
p[i] ^= 0x00FFFFFF;
}
}
}
}
break;
}
}
void BB_blit_to_BB8(BlitBuffer *src, BlitBuffer *dst,
int dest_x, int dest_y, int offs_x, int offs_y, int w, int h) {
int d_x, d_y, o_x, o_y;
Color8 *dstptr;
int sbb_type = GET_BB_TYPE(src);
int sbb_rotation = GET_BB_ROTATION(src);
int dbb_rotation = GET_BB_ROTATION(dst);
switch (sbb_type) {
case TYPE_BB8:
{
// We can only do a fast copy for simple same-to-same blitting without any extra processing.
// (i.e., setPixel, no rota, no invert).
// The cbb codepath ensures setPixel & no invert, so we only check for rotation.
if (sbb_rotation == 0 && dbb_rotation == 0) {
if (offs_x == 0 && dest_x == 0 && w == src->w && w == dst->w && src->stride == dst->stride) {
// Single step for contiguous scanlines (on both sides)
//fprintf(stdout, "%s: full copy blit from BB8 to BB8\n", __FUNCTION__);
// BB8 is 1 byte per pixel
const uint8_t *srcp = src->data + src->stride*offs_y;
uint8_t *dstp = dst->data + dst->stride*dest_y;
memcpy(dstp, srcp, w*h);
} else {
// Scanline per scanline copy
//fprintf(stdout, "%s: scanline copy blit from BB8 to BB8\n", __FUNCTION__);
o_y = offs_y;
for (d_y = dest_y; d_y < dest_y+h; d_y++, o_y++) {
// BB8 is 1 byte per pixel
const uint8_t *srcp = src->data + src->stride*o_y + offs_x;
uint8_t *dstp = dst->data + dst->stride*d_y + dest_x;
memcpy(dstp, srcp, w);
}
}
} else {
Color8 *srcptr;
o_y = offs_y;
for (d_y = dest_y; d_y < dest_y + h; d_y++) {
o_x = offs_x;
for (d_x = dest_x; d_x < dest_x + w; d_x++) {
BB_GET_PIXEL(dst, dbb_rotation, Color8, d_x, d_y, &dstptr);
BB_GET_PIXEL(src, sbb_rotation, Color8, o_x, o_y, &srcptr);
*dstptr = *srcptr;
o_x += 1;
}
o_y += 1;
}
}
}
break;
case TYPE_BB8A:
{
Color8A *srcptr;
o_y = offs_y;
for (d_y = dest_y; d_y < dest_y + h; d_y++) {
o_x = offs_x;
for (d_x = dest_x; d_x < dest_x + w; d_x++) {
BB_GET_PIXEL(dst, dbb_rotation, Color8, d_x, d_y, &dstptr);
BB_GET_PIXEL(src, sbb_rotation, Color8A, o_x, o_y, &srcptr);
dstptr->a = srcptr->a;
o_x += 1;
}
o_y += 1;
}
}
break;
case TYPE_BBRGB16:
{
ColorRGB16 *srcptr;
o_y = offs_y;
for (d_y = dest_y; d_y < dest_y + h; d_y++) {
o_x = offs_x;
for (d_x = dest_x; d_x < dest_x + w; d_x++) {
BB_GET_PIXEL(dst, dbb_rotation, Color8, d_x, d_y, &dstptr);
BB_GET_PIXEL(src, sbb_rotation, ColorRGB16, o_x, o_y, &srcptr);
dstptr->a = ColorRGB16_To_A(srcptr->v);
o_x += 1;
}
o_y += 1;
}
}
break;
case TYPE_BBRGB24:
{
ColorRGB24 *srcptr;
o_y = offs_y;
for (d_y = dest_y; d_y < dest_y + h; d_y++) {
o_x = offs_x;
for (d_x = dest_x; d_x < dest_x + w; d_x++) {
BB_GET_PIXEL(dst, dbb_rotation, Color8, d_x, d_y, &dstptr);
BB_GET_PIXEL(src, sbb_rotation, ColorRGB24, o_x, o_y, &srcptr);
dstptr->a = RGB_To_A(srcptr->r, srcptr->g, srcptr->b);
o_x += 1;
}
o_y += 1;
}
}
break;
case TYPE_BBRGB32:
{
ColorRGB32 *srcptr;
o_y = offs_y;
for (d_y = dest_y; d_y < dest_y + h; d_y++) {
o_x = offs_x;
for (d_x = dest_x; d_x < dest_x + w; d_x++) {
BB_GET_PIXEL(dst, dbb_rotation, Color8, d_x, d_y, &dstptr);
BB_GET_PIXEL(src, sbb_rotation, ColorRGB32, o_x, o_y, &srcptr);
dstptr->a = RGB_To_A(srcptr->r, srcptr->g, srcptr->b);
o_x += 1;
}
o_y += 1;
}
}
break;
}
}
// Quantize an 8-bit color value down to a palette of 16 evenly spaced colors, using an ordered 8x8 dithering pattern.
// With a grayscale input, this happens to match the eInk palette perfectly ;).
// If the input is not grayscale, and the output fb is not grayscale either,
// this usually still happens to match the eInk palette after the EPDC's own quantization pass.
// c.f., https://en.wikipedia.org/wiki/Ordered_dithering
// & https://github.com/ImageMagick/ImageMagick/blob/ecfeac404e75f304004f0566557848c53030bad6/MagickCore/threshold.c#L1627
// NOTE: As the references imply, this is straight from ImageMagick,
// with only minor simplifications to enforce Q8 & avoid fp maths.
static uint8_t
dither_o8x8(int x, int y, uint8_t v)
{
// c.f., https://github.com/ImageMagick/ImageMagick/blob/ecfeac404e75f304004f0566557848c53030bad6/config/thresholds.xml#L107
static const uint8_t threshold_map_o8x8[] = { 1, 49, 13, 61, 4, 52, 16, 64, 33, 17, 45, 29, 36, 20, 48, 32,
9, 57, 5, 53, 12, 60, 8, 56, 41, 25, 37, 21, 44, 28, 40, 24,
3, 51, 15, 63, 2, 50, 14, 62, 35, 19, 47, 31, 34, 18, 46, 30,
11, 59, 7, 55, 10, 58, 6, 54, 43, 27, 39, 23, 42, 26, 38, 22 };
// Constants:
// Quantum = 8; Levels = 16; map Divisor = 65
// QuantumRange = 0xFF
// QuantumScale = 1.0 / QuantumRange
//
// threshold = QuantumScale * v * ((L-1) * (D-1) + 1)
// NOTE: The initial computation of t (specifically, what we pass to DIV255) would overflow an uint8_t.
// With a Q8 input value, we're at no risk of ever underflowing, so, keep to unsigned maths.
// Technically, an uint16_t would be wide enough, but it gains us nothing,
// and requires a few explicit casts to make GCC happy ;).
uint32_t t = DIV_255(v * ((15U << 6) + 1U));
// level = t / (D-1);
uint32_t l = (t >> 6);
// t -= l * (D-1);
t = (t - (l << 6));
// map width & height = 8
// c = ClampToQuantum((l+(t >= map[(x % mw) + mw * (y % mh)])) * QuantumRange / (L-1));
uint32_t q = ((l + (t >= threshold_map_o8x8[(x & 7U) + 8U * (y & 7U)])) * 17);
// NOTE: We're doing unsigned maths, so, clamping is basically MIN(q, UINT8_MAX) ;).
// The only overflow we should ever catch should be for a few white (v = 0xFF) input pixels
// that get shifted to the next step (i.e., q = 272 (0xFF + 17)).
return (q > UINT8_MAX ? UINT8_MAX : (uint8_t) q);
}
void BB_dither_blit_to_BB8(BlitBuffer *src, BlitBuffer *dst,
int dest_x, int dest_y, int offs_x, int offs_y, int w, int h) {
int d_x, d_y, o_x, o_y;
Color8 *dstptr;
int sbb_type = GET_BB_TYPE(src);
int sbb_rotation = GET_BB_ROTATION(src);
int dbb_rotation = GET_BB_ROTATION(dst);
switch (sbb_type) {
case TYPE_BB8:
{
Color8 *srcptr;
o_y = offs_y;
for (d_y = dest_y; d_y < dest_y + h; d_y++) {
o_x = offs_x;
for (d_x = dest_x; d_x < dest_x + w; d_x++) {
BB_GET_PIXEL(dst, dbb_rotation, Color8, d_x, d_y, &dstptr);
BB_GET_PIXEL(src, sbb_rotation, Color8, o_x, o_y, &srcptr);
dstptr->a = dither_o8x8(o_x, o_y, srcptr->a);
o_x += 1;
}
o_y += 1;
}
}
break;
case TYPE_BB8A:
{
Color8A *srcptr;
o_y = offs_y;
for (d_y = dest_y; d_y < dest_y + h; d_y++) {
o_x = offs_x;
for (d_x = dest_x; d_x < dest_x + w; d_x++) {
BB_GET_PIXEL(dst, dbb_rotation, Color8, d_x, d_y, &dstptr);
BB_GET_PIXEL(src, sbb_rotation, Color8A, o_x, o_y, &srcptr);
dstptr->a = dither_o8x8(o_x, o_y, srcptr->a);
o_x += 1;
}
o_y += 1;
}
}
break;
case TYPE_BBRGB16:
{
ColorRGB16 *srcptr;
o_y = offs_y;
for (d_y = dest_y; d_y < dest_y + h; d_y++) {
o_x = offs_x;
for (d_x = dest_x; d_x < dest_x + w; d_x++) {
BB_GET_PIXEL(dst, dbb_rotation, Color8, d_x, d_y, &dstptr);
BB_GET_PIXEL(src, sbb_rotation, ColorRGB16, o_x, o_y, &srcptr);
dstptr->a = dither_o8x8(o_x, o_y, ColorRGB16_To_A(srcptr->v));
o_x += 1;
}
o_y += 1;
}
}
break;
case TYPE_BBRGB24:
{
ColorRGB24 *srcptr;
o_y = offs_y;
for (d_y = dest_y; d_y < dest_y + h; d_y++) {
o_x = offs_x;
for (d_x = dest_x; d_x < dest_x + w; d_x++) {
BB_GET_PIXEL(dst, dbb_rotation, Color8, d_x, d_y, &dstptr);
BB_GET_PIXEL(src, sbb_rotation, ColorRGB24, o_x, o_y, &srcptr);
dstptr->a = dither_o8x8(o_x, o_y, RGB_To_A(srcptr->r, srcptr->g, srcptr->b));
o_x += 1;
}
o_y += 1;
}
}
break;
case TYPE_BBRGB32:
{
ColorRGB32 *srcptr;
o_y = offs_y;
for (d_y = dest_y; d_y < dest_y + h; d_y++) {
o_x = offs_x;
for (d_x = dest_x; d_x < dest_x + w; d_x++) {
BB_GET_PIXEL(dst, dbb_rotation, Color8, d_x, d_y, &dstptr);
BB_GET_PIXEL(src, sbb_rotation, ColorRGB32, o_x, o_y, &srcptr);
dstptr->a = dither_o8x8(o_x, o_y, RGB_To_A(srcptr->r, srcptr->g, srcptr->b));
o_x += 1;
}
o_y += 1;
}
}
break;
}
}
void BB_blit_to_BB8A(BlitBuffer *src, BlitBuffer *dst,
int dest_x, int dest_y, int offs_x, int offs_y, int w, int h) {
int d_x, d_y, o_x, o_y;
Color8A *dstptr;
int sbb_type = GET_BB_TYPE(src);
int sbb_rotation = GET_BB_ROTATION(src);
int dbb_rotation = GET_BB_ROTATION(dst);
switch (sbb_type) {
case TYPE_BB8:
{
Color8 *srcptr;
o_y = offs_y;
for (d_y = dest_y; d_y < dest_y + h; d_y++) {
o_x = offs_x;
for (d_x = dest_x; d_x < dest_x + w; d_x++) {
BB_GET_PIXEL(dst, dbb_rotation, Color8A, d_x, d_y, &dstptr);
BB_GET_PIXEL(src, sbb_rotation, Color8, o_x, o_y, &srcptr);
dstptr->a = srcptr->a;
o_x += 1;
}
o_y += 1;
}
}
break;
case TYPE_BB8A:
{
Color8A *srcptr;
o_y = offs_y;
for (d_y = dest_y; d_y < dest_y + h; d_y++) {
o_x = offs_x;
for (d_x = dest_x; d_x < dest_x + w; d_x++) {
BB_GET_PIXEL(dst, dbb_rotation, Color8A, d_x, d_y, &dstptr);
BB_GET_PIXEL(src, sbb_rotation, Color8A, o_x, o_y, &srcptr);
*dstptr = *srcptr;
o_x += 1;
}
o_y += 1;
}
}
break;
case TYPE_BBRGB16:
{
ColorRGB16 *srcptr;
o_y = offs_y;
for (d_y = dest_y; d_y < dest_y + h; d_y++) {
o_x = offs_x;
for (d_x = dest_x; d_x < dest_x + w; d_x++) {
BB_GET_PIXEL(dst, dbb_rotation, Color8A, d_x, d_y, &dstptr);
BB_GET_PIXEL(src, sbb_rotation, ColorRGB16, o_x, o_y, &srcptr);
dstptr->a = ColorRGB16_To_A(srcptr->v);
o_x += 1;
}
o_y += 1;
}
}
break;
case TYPE_BBRGB24:
{
ColorRGB24 *srcptr;
o_y = offs_y;
for (d_y = dest_y; d_y < dest_y + h; d_y++) {
o_x = offs_x;
for (d_x = dest_x; d_x < dest_x + w; d_x++) {
BB_GET_PIXEL(dst, dbb_rotation, Color8A, d_x, d_y, &dstptr);
BB_GET_PIXEL(src, sbb_rotation, ColorRGB24, o_x, o_y, &srcptr);
dstptr->a = RGB_To_A(srcptr->r, srcptr->g, srcptr->b);
o_x += 1;
}
o_y += 1;
}
}
break;
case TYPE_BBRGB32:
{
ColorRGB32 *srcptr;
o_y = offs_y;
for (d_y = dest_y; d_y < dest_y + h; d_y++) {
o_x = offs_x;
for (d_x = dest_x; d_x < dest_x + w; d_x++) {
BB_GET_PIXEL(dst, dbb_rotation, Color8A, d_x, d_y, &dstptr);
BB_GET_PIXEL(src, sbb_rotation, ColorRGB32, o_x, o_y, &srcptr);
dstptr->a = RGB_To_A(srcptr->r, srcptr->g, srcptr->b);
o_x += 1;
}
o_y += 1;
}
}
break;
}
}
void BB_blit_to_BB16(BlitBuffer *src, BlitBuffer *dst,
int dest_x, int dest_y, int offs_x, int offs_y, int w, int h) {
int d_x, d_y, o_x, o_y;
uint8_t v, v5bit;
ColorRGB16 *dstptr;
int sbb_type = GET_BB_TYPE(src);
int sbb_rotation = GET_BB_ROTATION(src);
int dbb_rotation = GET_BB_ROTATION(dst);
switch (sbb_type) {
case TYPE_BB8:
{
Color8 *srcptr;
o_y = offs_y;
for (d_y = dest_y; d_y < dest_y + h; d_y++) {
o_x = offs_x;
for (d_x = dest_x; d_x < dest_x + w; d_x++) {
BB_GET_PIXEL(dst, dbb_rotation, ColorRGB16, d_x, d_y, &dstptr);
BB_GET_PIXEL(src, sbb_rotation, Color8, o_x, o_y, &srcptr);
v = srcptr->a;
v5bit = v >> 3U;
dstptr->v = (v5bit << 11U) + ((v & 0xFC) << 3U) + v5bit;
o_x += 1;
}
o_y += 1;
}
}
break;
case TYPE_BB8A:
{
Color8A *srcptr;
o_y = offs_y;
for (d_y = dest_y; d_y < dest_y + h; d_y++) {
o_x = offs_x;
for (d_x = dest_x; d_x < dest_x + w; d_x++) {
BB_GET_PIXEL(dst, dbb_rotation, ColorRGB16, d_x, d_y, &dstptr);
BB_GET_PIXEL(src, sbb_rotation, Color8A, o_x, o_y, &srcptr);
v = srcptr->a;
v5bit = v >> 3U;
dstptr->v = (v5bit << 11U) + ((v & 0xFC) << 3U) + v5bit;
o_x += 1;
}
o_y += 1;
}
}
break;
case TYPE_BBRGB16:
{
ColorRGB16 *srcptr;
o_y = offs_y;
for (d_y = dest_y; d_y < dest_y + h; d_y++) {
o_x = offs_x;
for (d_x = dest_x; d_x < dest_x + w; d_x++) {
BB_GET_PIXEL(dst, dbb_rotation, ColorRGB16, d_x, d_y, &dstptr);
BB_GET_PIXEL(src, sbb_rotation, ColorRGB16, o_x, o_y, &srcptr);
*dstptr = *srcptr;
o_x += 1;
}
o_y += 1;
}
}
break;
case TYPE_BBRGB24:
{
ColorRGB24 *srcptr;
o_y = offs_y;
for (d_y = dest_y; d_y < dest_y + h; d_y++) {
o_x = offs_x;
for (d_x = dest_x; d_x < dest_x + w; d_x++) {
BB_GET_PIXEL(dst, dbb_rotation, ColorRGB16, d_x, d_y, &dstptr);
BB_GET_PIXEL(src, sbb_rotation, ColorRGB24, o_x, o_y, &srcptr);
dstptr->v = RGB_To_RGB16(srcptr->r, srcptr->g, srcptr->b);
o_x += 1;
}
o_y += 1;
}
}
break;
case TYPE_BBRGB32:
{
ColorRGB32 *srcptr;
o_y = offs_y;
for (d_y = dest_y; d_y < dest_y + h; d_y++) {
o_x = offs_x;
for (d_x = dest_x; d_x < dest_x + w; d_x++) {
BB_GET_PIXEL(dst, dbb_rotation, ColorRGB16, d_x, d_y, &dstptr);
BB_GET_PIXEL(src, sbb_rotation, ColorRGB32, o_x, o_y, &srcptr);
dstptr->v = RGB_To_RGB16(srcptr->r, srcptr->g, srcptr->b);
o_x += 1;
}
o_y += 1;
}
}
break;
}
}
void BB_blit_to_BB24(BlitBuffer *src, BlitBuffer *dst,
int dest_x, int dest_y, int offs_x, int offs_y, int w, int h) {
int d_x, d_y, o_x, o_y;
ColorRGB24 *dstptr;
int sbb_type = GET_BB_TYPE(src);
int sbb_rotation = GET_BB_ROTATION(src);
int dbb_rotation = GET_BB_ROTATION(dst);
switch (sbb_type) {
case TYPE_BB8:
{
Color8 *srcptr;
o_y = offs_y;
for (d_y = dest_y; d_y < dest_y + h; d_y++) {
o_x = offs_x;
for (d_x = dest_x; d_x < dest_x + w; d_x++) {
BB_GET_PIXEL(dst, dbb_rotation, ColorRGB24, d_x, d_y, &dstptr);
BB_GET_PIXEL(src, sbb_rotation, Color8, o_x, o_y, &srcptr);
dstptr->r = srcptr->a;
dstptr->g = srcptr->a;
dstptr->b = srcptr->a;
o_x += 1;
}
o_y += 1;
}
}
break;
case TYPE_BB8A:
{
Color8A *srcptr;
o_y = offs_y;
for (d_y = dest_y; d_y < dest_y + h; d_y++) {
o_x = offs_x;
for (d_x = dest_x; d_x < dest_x + w; d_x++) {
BB_GET_PIXEL(dst, dbb_rotation, ColorRGB24, d_x, d_y, &dstptr);
BB_GET_PIXEL(src, sbb_rotation, Color8A, o_x, o_y, &srcptr);
dstptr->r = srcptr->a;
dstptr->g = srcptr->a;
dstptr->b = srcptr->a;
o_x += 1;
}
o_y += 1;
}
}
break;
case TYPE_BBRGB16:
{
ColorRGB16 *srcptr;
o_y = offs_y;
for (d_y = dest_y; d_y < dest_y + h; d_y++) {
o_x = offs_x;
for (d_x = dest_x; d_x < dest_x + w; d_x++) {
BB_GET_PIXEL(dst, dbb_rotation, ColorRGB24, d_x, d_y, &dstptr);
BB_GET_PIXEL(src, sbb_rotation, ColorRGB16, o_x, o_y, &srcptr);
dstptr->r = ColorRGB16_GetR(srcptr->v);
dstptr->g = ColorRGB16_GetG(srcptr->v);
dstptr->b = ColorRGB16_GetB(srcptr->v);
o_x += 1;
}
o_y += 1;
}
}
break;
case TYPE_BBRGB24:
{
ColorRGB24 *srcptr;
o_y = offs_y;
for (d_y = dest_y; d_y < dest_y + h; d_y++) {
o_x = offs_x;
for (d_x = dest_x; d_x < dest_x + w; d_x++) {
BB_GET_PIXEL(dst, dbb_rotation, ColorRGB24, d_x, d_y, &dstptr);
BB_GET_PIXEL(src, sbb_rotation, ColorRGB24, o_x, o_y, &srcptr);
*dstptr = *srcptr;
o_x += 1;
}
o_y += 1;
}
}
break;
case TYPE_BBRGB32:
{
ColorRGB32 *srcptr;
o_y = offs_y;
for (d_y = dest_y; d_y < dest_y + h; d_y++) {
o_x = offs_x;
for (d_x = dest_x; d_x < dest_x + w; d_x++) {
BB_GET_PIXEL(dst, dbb_rotation, ColorRGB24, d_x, d_y, &dstptr);
BB_GET_PIXEL(src, sbb_rotation, ColorRGB32, o_x, o_y, &srcptr);
dstptr->r = srcptr->r;
dstptr->g = srcptr->g;
dstptr->b = srcptr->b;
o_x += 1;
}
o_y += 1;
}
}
break;
}
}
void BB_blit_to_BB32(BlitBuffer *src, BlitBuffer *dst,
int dest_x, int dest_y, int offs_x, int offs_y, int w, int h) {
int d_x, d_y, o_x, o_y;
ColorRGB32 *dstptr;
int sbb_type = GET_BB_TYPE(src);
int sbb_rotation = GET_BB_ROTATION(src);
int dbb_rotation = GET_BB_ROTATION(dst);
switch (sbb_type) {
case TYPE_BB8:
{
Color8 *srcptr;
o_y = offs_y;
for (d_y = dest_y; d_y < dest_y + h; d_y++) {
o_x = offs_x;
for (d_x = dest_x; d_x < dest_x + w; d_x++) {
BB_GET_PIXEL(dst, dbb_rotation, ColorRGB32, d_x, d_y, &dstptr);
BB_GET_PIXEL(src, sbb_rotation, Color8, o_x, o_y, &srcptr);
dstptr->r = srcptr->a;
dstptr->g = srcptr->a;
dstptr->b = srcptr->a;
dstptr->alpha = 0xFF;
o_x += 1;