int
SDL_BlendPoint(SDL_Surface * dst, int x, int y, SDL_BlendMode blendMode, Uint8 r,
Uint8 g, Uint8 b, Uint8 a)
{
if (!dst) {
return SDL_SetError("Passed NULL destination surface");
}
/* This function doesn't work on surfaces < 8 bpp */
if (dst->format->BitsPerPixel < 8) {
return SDL_SetError("SDL_BlendPoint(): Unsupported surface format");
}
/* Perform clipping */
if (x < dst->clip_rect.x || y < dst->clip_rect.y ||
x >= (dst->clip_rect.x + dst->clip_rect.w) ||
y >= (dst->clip_rect.y + dst->clip_rect.h)) {
return 0;
}
if (blendMode == SDL_BLENDMODE_BLEND || blendMode == SDL_BLENDMODE_ADD) {
r = DRAW_MUL(r, a);
g = DRAW_MUL(g, a);
b = DRAW_MUL(b, a);
}
switch (dst->format->BitsPerPixel) {
case 15:
switch (dst->format->Rmask) {
case 0x7C00:
return SDL_BlendPoint_RGB555(dst, x, y, blendMode, r, g, b, a);
}
break;
case 16:
switch (dst->format->Rmask) {
case 0xF800:
return SDL_BlendPoint_RGB565(dst, x, y, blendMode, r, g, b, a);
}
break;
case 32:
switch (dst->format->Rmask) {
case 0x00FF0000:
if (!dst->format->Amask) {
return SDL_BlendPoint_RGB888(dst, x, y, blendMode, r, g, b, a);
} else {
return SDL_BlendPoint_ARGB8888(dst, x, y, blendMode, r, g, b, a);
}
/* break; -Wunreachable-code-break */
}
break;
default:
break;
}
if (!dst->format->Amask) {
return SDL_BlendPoint_RGB(dst, x, y, blendMode, r, g, b, a);
} else {
return SDL_BlendPoint_RGBA(dst, x, y, blendMode, r, g, b, a);
}
}
int
SDL_BlendPoints(SDL_Surface * dst, const SDL_Point * points, int count,
SDL_BlendMode blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
{
int minx, miny;
int maxx, maxy;
int i;
int x, y;
int (*func)(SDL_Surface * dst, int x, int y,
SDL_BlendMode blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a) = NULL;
int status = 0;
if (!dst) {
return SDL_SetError("Passed NULL destination surface");
}
/* This function doesn't work on surfaces < 8 bpp */
if (dst->format->BitsPerPixel < 8) {
return SDL_SetError("SDL_BlendPoints(): Unsupported surface format");
}
if (blendMode == SDL_BLENDMODE_BLEND || blendMode == SDL_BLENDMODE_ADD) {
r = DRAW_MUL(r, a);
g = DRAW_MUL(g, a);
b = DRAW_MUL(b, a);
}
/* FIXME: Does this function pointer slow things down significantly? */
switch (dst->format->BitsPerPixel) {
case 15:
switch (dst->format->Rmask) {
case 0x7C00:
func = SDL_BlendPoint_RGB555;
break;
}
break;
case 16:
switch (dst->format->Rmask) {
case 0xF800:
func = SDL_BlendPoint_RGB565;
break;
}
break;
case 32:
switch (dst->format->Rmask) {
case 0x00FF0000:
if (!dst->format->Amask) {
func = SDL_BlendPoint_RGB888;
} else {
func = SDL_BlendPoint_ARGB8888;
}
break;
}
break;
default:
break;
}
if (!func) {
if (!dst->format->Amask) {
func = SDL_BlendPoint_RGB;
} else {
func = SDL_BlendPoint_RGBA;
}
}
minx = dst->clip_rect.x;
maxx = dst->clip_rect.x + dst->clip_rect.w - 1;
miny = dst->clip_rect.y;
maxy = dst->clip_rect.y + dst->clip_rect.h - 1;
for (i = 0; i < count; ++i) {
x = points[i].x;
y = points[i].y;
if (x < minx || x > maxx || y < miny || y > maxy) {
continue;
}
status = func(dst, x, y, blendMode, r, g, b, a);
}
return status;
}
int
SDL_BlendFillRects(SDL_Surface * dst, const SDL_Rect * rects, int count,
SDL_BlendMode blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
{
SDL_Rect rect;
int i;
int (*func)(SDL_Surface * dst, const SDL_Rect * rect,
SDL_BlendMode blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a) = NULL;
int status = 0;
if (!dst) {
return SDL_SetError("Passed NULL destination surface");
}
/* This function doesn't work on surfaces < 8 bpp */
if (dst->format->BitsPerPixel < 8) {
return SDL_SetError("SDL_BlendFillRects(): Unsupported surface format");
}
if (blendMode == SDL_BLENDMODE_BLEND || blendMode == SDL_BLENDMODE_ADD) {
r = DRAW_MUL(r, a);
g = DRAW_MUL(g, a);
b = DRAW_MUL(b, a);
}
/* FIXME: Does this function pointer slow things down significantly? */
switch (dst->format->BitsPerPixel) {
case 15:
switch (dst->format->Rmask) {
case 0x7C00:
func = SDL_BlendFillRect_RGB555;
}
break;
case 16:
switch (dst->format->Rmask) {
case 0xF800:
func = SDL_BlendFillRect_RGB565;
}
break;
case 32:
switch (dst->format->Rmask) {
case 0x00FF0000:
if (!dst->format->Amask) {
func = SDL_BlendFillRect_RGB888;
} else {
func = SDL_BlendFillRect_ARGB8888;
}
break;
}
break;
default:
break;
}
if (!func) {
if (!dst->format->Amask) {
func = SDL_BlendFillRect_RGB;
} else {
func = SDL_BlendFillRect_RGBA;
}
}
for (i = 0; i < count; ++i) {
/* Perform clipping */
if (!SDL_IntersectRect(&rects[i], &dst->clip_rect, &rect)) {
continue;
}
status = func(dst, &rect, blendMode, r, g, b, a);
}
return status;
}
int
SDL_BlendFillRect(SDL_Surface * dst, const SDL_Rect * rect,
SDL_BlendMode blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
{
SDL_Rect clipped;
if (!dst) {
return SDL_SetError("Passed NULL destination surface");
}
/* This function doesn't work on surfaces < 8 bpp */
if (dst->format->BitsPerPixel < 8) {
return SDL_SetError("SDL_BlendFillRect(): Unsupported surface format");
}
/* If 'rect' == NULL, then fill the whole surface */
if (rect) {
/* Perform clipping */
if (!SDL_IntersectRect(rect, &dst->clip_rect, &clipped)) {
return 0;
}
rect = &clipped;
} else {
rect = &dst->clip_rect;
}
if (blendMode == SDL_BLENDMODE_BLEND || blendMode == SDL_BLENDMODE_ADD) {
r = DRAW_MUL(r, a);
g = DRAW_MUL(g, a);
b = DRAW_MUL(b, a);
}
switch (dst->format->BitsPerPixel) {
case 15:
switch (dst->format->Rmask) {
case 0x7C00:
return SDL_BlendFillRect_RGB555(dst, rect, blendMode, r, g, b, a);
}
break;
case 16:
switch (dst->format->Rmask) {
case 0xF800:
return SDL_BlendFillRect_RGB565(dst, rect, blendMode, r, g, b, a);
}
break;
case 32:
switch (dst->format->Rmask) {
case 0x00FF0000:
if (!dst->format->Amask) {
return SDL_BlendFillRect_RGB888(dst, rect, blendMode, r, g, b, a);
} else {
return SDL_BlendFillRect_ARGB8888(dst, rect, blendMode, r, g, b, a);
}
break;
}
break;
default:
break;
}
if (!dst->format->Amask) {
return SDL_BlendFillRect_RGB(dst, rect, blendMode, r, g, b, a);
} else {
return SDL_BlendFillRect_RGBA(dst, rect, blendMode, r, g, b, a);
}
}
int
SDL_BlendLine(SDL_Surface * dst, int x1, int y1, int x2, int y2,
int blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
{
SDL_PixelFormat *fmt = dst->format;
/* This function doesn't work on surfaces < 8 bpp */
if (dst->format->BitsPerPixel < 8) {
SDL_SetError("SDL_BlendLine(): Unsupported surface format");
return (-1);
}
/* Perform clipping */
if (!SDL_IntersectRectAndLine(&dst->clip_rect, &x1, &y1, &x2, &y2)) {
return (0);
}
if ((blendMode == SDL_BLENDMODE_BLEND)
|| (blendMode == SDL_BLENDMODE_ADD)) {
r = DRAW_MUL(r, a);
g = DRAW_MUL(g, a);
b = DRAW_MUL(b, a);
}
switch (fmt->BitsPerPixel) {
case 15:
switch (fmt->Rmask) {
case 0x7C00:
return SDL_BlendLine_RGB555(dst, x1, y1, x2, y2, blendMode, r, g,
b, a);
}
break;
case 16:
switch (fmt->Rmask) {
case 0xF800:
return SDL_BlendLine_RGB565(dst, x1, y1, x2, y2, blendMode, r, g,
b, a);
}
break;
case 32:
switch (fmt->Rmask) {
case 0x00FF0000:
if (!fmt->Amask) {
return SDL_BlendLine_RGB888(dst, x1, y1, x2, y2, blendMode, r,
g, b, a);
} else {
return SDL_BlendLine_ARGB8888(dst, x1, y1, x2, y2, blendMode,
r, g, b, a);
}
break;
}
default:
break;
}
if (!fmt->Amask) {
return SDL_BlendLine_RGB(dst, x1, y1, x2, y2, blendMode, r, g, b, a);
} else {
return SDL_BlendLine_RGBA(dst, x1, y1, x2, y2, blendMode, r, g, b, a);
}
}
static void
SDL_BlendLine_ARGB8888(SDL_Surface * dst, int x1, int y1, int x2, int y2,
SDL_BlendMode blendMode, Uint8 _r, Uint8 _g, Uint8 _b, Uint8 _a,
SDL_bool draw_end)
{
unsigned r, g, b, a, inva;
if (blendMode == SDL_BLENDMODE_BLEND || blendMode == SDL_BLENDMODE_ADD) {
r = DRAW_MUL(_r, _a);
g = DRAW_MUL(_g, _a);
b = DRAW_MUL(_b, _a);
a = _a;
} else {
r = _r;
g = _g;
b = _b;
a = _a;
}
inva = (a ^ 0xff);
if (y1 == y2) {
switch (blendMode) {
case SDL_BLENDMODE_BLEND:
HLINE(Uint32, DRAW_SETPIXEL_BLEND_ARGB8888, draw_end);
break;
case SDL_BLENDMODE_ADD:
HLINE(Uint32, DRAW_SETPIXEL_ADD_ARGB8888, draw_end);
break;
case SDL_BLENDMODE_MOD:
HLINE(Uint32, DRAW_SETPIXEL_MOD_ARGB8888, draw_end);
break;
default:
HLINE(Uint32, DRAW_SETPIXEL_ARGB8888, draw_end);
break;
}
} else if (x1 == x2) {
switch (blendMode) {
case SDL_BLENDMODE_BLEND:
VLINE(Uint32, DRAW_SETPIXEL_BLEND_ARGB8888, draw_end);
break;
case SDL_BLENDMODE_ADD:
VLINE(Uint32, DRAW_SETPIXEL_ADD_ARGB8888, draw_end);
break;
case SDL_BLENDMODE_MOD:
VLINE(Uint32, DRAW_SETPIXEL_MOD_ARGB8888, draw_end);
break;
default:
VLINE(Uint32, DRAW_SETPIXEL_ARGB8888, draw_end);
break;
}
} else if (ABS(x1 - x2) == ABS(y1 - y2)) {
switch (blendMode) {
case SDL_BLENDMODE_BLEND:
DLINE(Uint32, DRAW_SETPIXEL_BLEND_ARGB8888, draw_end);
break;
case SDL_BLENDMODE_ADD:
DLINE(Uint32, DRAW_SETPIXEL_ADD_ARGB8888, draw_end);
break;
case SDL_BLENDMODE_MOD:
DLINE(Uint32, DRAW_SETPIXEL_MOD_ARGB8888, draw_end);
break;
default:
DLINE(Uint32, DRAW_SETPIXEL_ARGB8888, draw_end);
break;
}
} else {
switch (blendMode) {
case SDL_BLENDMODE_BLEND:
AALINE(x1, y1, x2, y2,
DRAW_SETPIXELXY_BLEND_ARGB8888, DRAW_SETPIXELXY_BLEND_ARGB8888,
draw_end);
break;
case SDL_BLENDMODE_ADD:
AALINE(x1, y1, x2, y2,
DRAW_SETPIXELXY_ADD_ARGB8888, DRAW_SETPIXELXY_ADD_ARGB8888,
draw_end);
break;
case SDL_BLENDMODE_MOD:
AALINE(x1, y1, x2, y2,
DRAW_SETPIXELXY_MOD_ARGB8888, DRAW_SETPIXELXY_MOD_ARGB8888,
draw_end);
break;
default:
AALINE(x1, y1, x2, y2,
DRAW_SETPIXELXY_ARGB8888, DRAW_SETPIXELXY_BLEND_ARGB8888,
draw_end);
break;
}
}
}