SDL  2.0
Functions
SDL_blendpoint.c File Reference
#include "../../SDL_internal.h"
#include "SDL_draw.h"
#include "SDL_blendpoint.h"
+ Include dependency graph for SDL_blendpoint.c:

Go to the source code of this file.

Functions

static int SDL_BlendPoint_RGB555 (SDL_Surface *dst, int x, int y, SDL_BlendMode blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
static int SDL_BlendPoint_RGB565 (SDL_Surface *dst, int x, int y, SDL_BlendMode blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
static int SDL_BlendPoint_RGB888 (SDL_Surface *dst, int x, int y, SDL_BlendMode blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
static int SDL_BlendPoint_ARGB8888 (SDL_Surface *dst, int x, int y, SDL_BlendMode blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
static int SDL_BlendPoint_RGB (SDL_Surface *dst, int x, int y, SDL_BlendMode blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
static int SDL_BlendPoint_RGBA (SDL_Surface *dst, int x, int y, SDL_BlendMode blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
int SDL_BlendPoint (SDL_Surface *dst, int x, int y, SDL_BlendMode blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
int SDL_BlendPoints (SDL_Surface *dst, const SDL_Point *points, int count, SDL_BlendMode blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a)

Function Documentation

int SDL_BlendPoint ( SDL_Surface *  dst,
int  x,
int  y,
SDL_BlendMode  blendMode,
Uint8  r,
Uint8  g,
Uint8  b,
Uint8  a 
)

Definition at line 196 of file SDL_blendpoint.c.

References SDL_PixelFormat::Amask, SDL_PixelFormat::BitsPerPixel, SDL_Surface::clip_rect, DRAW_MUL, SDL_Surface::format, SDL_Rect::h, SDL_PixelFormat::Rmask, SDL_BLENDMODE_ADD, SDL_BLENDMODE_BLEND, SDL_BlendPoint_ARGB8888(), SDL_BlendPoint_RGB(), SDL_BlendPoint_RGB555(), SDL_BlendPoint_RGB565(), SDL_BlendPoint_RGB888(), SDL_BlendPoint_RGBA(), SDL_SetError, SDL_Rect::w, SDL_Rect::x, and SDL_Rect::y.

Referenced by SDL_BlendLines().

{
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);
}
}
static int SDL_BlendPoint_ARGB8888 ( SDL_Surface *  dst,
int  x,
int  y,
SDL_BlendMode  blendMode,
Uint8  r,
Uint8  g,
Uint8  b,
Uint8  a 
)
static

Definition at line 99 of file SDL_blendpoint.c.

References DRAW_SETPIXELXY_ADD_ARGB8888, DRAW_SETPIXELXY_ARGB8888, DRAW_SETPIXELXY_BLEND_ARGB8888, DRAW_SETPIXELXY_MOD_ARGB8888, SDL_BLENDMODE_ADD, SDL_BLENDMODE_BLEND, and SDL_BLENDMODE_MOD.

Referenced by SDL_BlendPoint(), and SDL_BlendPoints().

{
unsigned inva = 0xff - a;
switch (blendMode) {
case SDL_BLENDMODE_BLEND:
DRAW_SETPIXELXY_BLEND_ARGB8888(x, y);
break;
case SDL_BLENDMODE_ADD:
DRAW_SETPIXELXY_ADD_ARGB8888(x, y);
break;
case SDL_BLENDMODE_MOD:
DRAW_SETPIXELXY_MOD_ARGB8888(x, y);
break;
default:
DRAW_SETPIXELXY_ARGB8888(x, y);
break;
}
return 0;
}
static int SDL_BlendPoint_RGB ( SDL_Surface *  dst,
int  x,
int  y,
SDL_BlendMode  blendMode,
Uint8  r,
Uint8  g,
Uint8  b,
Uint8  a 
)
static

Definition at line 122 of file SDL_blendpoint.c.

References SDL_PixelFormat::BytesPerPixel, DRAW_SETPIXELXY2_ADD_RGB, DRAW_SETPIXELXY2_BLEND_RGB, DRAW_SETPIXELXY2_MOD_RGB, DRAW_SETPIXELXY2_RGB, DRAW_SETPIXELXY4_ADD_RGB, DRAW_SETPIXELXY4_BLEND_RGB, DRAW_SETPIXELXY4_MOD_RGB, DRAW_SETPIXELXY4_RGB, SDL_Surface::format, SDL_BLENDMODE_ADD, SDL_BLENDMODE_BLEND, SDL_BLENDMODE_MOD, and SDL_Unsupported.

Referenced by SDL_BlendPoint(), and SDL_BlendPoints().

{
SDL_PixelFormat *fmt = dst->format;
unsigned inva = 0xff - a;
switch (fmt->BytesPerPixel) {
case 2:
switch (blendMode) {
case SDL_BLENDMODE_BLEND:
DRAW_SETPIXELXY2_BLEND_RGB(x, y);
break;
case SDL_BLENDMODE_ADD:
DRAW_SETPIXELXY2_ADD_RGB(x, y);
break;
case SDL_BLENDMODE_MOD:
DRAW_SETPIXELXY2_MOD_RGB(x, y);
break;
default:
DRAW_SETPIXELXY2_RGB(x, y);
break;
}
return 0;
case 4:
switch (blendMode) {
case SDL_BLENDMODE_BLEND:
DRAW_SETPIXELXY4_BLEND_RGB(x, y);
break;
case SDL_BLENDMODE_ADD:
DRAW_SETPIXELXY4_ADD_RGB(x, y);
break;
case SDL_BLENDMODE_MOD:
DRAW_SETPIXELXY4_MOD_RGB(x, y);
break;
default:
DRAW_SETPIXELXY4_RGB(x, y);
break;
}
return 0;
default:
return SDL_Unsupported();
}
}
static int SDL_BlendPoint_RGB555 ( SDL_Surface *  dst,
int  x,
int  y,
SDL_BlendMode  blendMode,
Uint8  r,
Uint8  g,
Uint8  b,
Uint8  a 
)
static

Definition at line 30 of file SDL_blendpoint.c.

References DRAW_SETPIXELXY_ADD_RGB555, DRAW_SETPIXELXY_BLEND_RGB555, DRAW_SETPIXELXY_MOD_RGB555, DRAW_SETPIXELXY_RGB555, SDL_BLENDMODE_ADD, SDL_BLENDMODE_BLEND, and SDL_BLENDMODE_MOD.

Referenced by SDL_BlendPoint(), and SDL_BlendPoints().

{
unsigned inva = 0xff - a;
switch (blendMode) {
case SDL_BLENDMODE_BLEND:
DRAW_SETPIXELXY_BLEND_RGB555(x, y);
break;
case SDL_BLENDMODE_ADD:
DRAW_SETPIXELXY_ADD_RGB555(x, y);
break;
case SDL_BLENDMODE_MOD:
DRAW_SETPIXELXY_MOD_RGB555(x, y);
break;
default:
DRAW_SETPIXELXY_RGB555(x, y);
break;
}
return 0;
}
static int SDL_BlendPoint_RGB565 ( SDL_Surface *  dst,
int  x,
int  y,
SDL_BlendMode  blendMode,
Uint8  r,
Uint8  g,
Uint8  b,
Uint8  a 
)
static

Definition at line 53 of file SDL_blendpoint.c.

References DRAW_SETPIXELXY_ADD_RGB565, DRAW_SETPIXELXY_BLEND_RGB565, DRAW_SETPIXELXY_MOD_RGB565, DRAW_SETPIXELXY_RGB565, SDL_BLENDMODE_ADD, SDL_BLENDMODE_BLEND, and SDL_BLENDMODE_MOD.

Referenced by SDL_BlendPoint(), and SDL_BlendPoints().

{
unsigned inva = 0xff - a;
switch (blendMode) {
case SDL_BLENDMODE_BLEND:
DRAW_SETPIXELXY_BLEND_RGB565(x, y);
break;
case SDL_BLENDMODE_ADD:
DRAW_SETPIXELXY_ADD_RGB565(x, y);
break;
case SDL_BLENDMODE_MOD:
DRAW_SETPIXELXY_MOD_RGB565(x, y);
break;
default:
DRAW_SETPIXELXY_RGB565(x, y);
break;
}
return 0;
}
static int SDL_BlendPoint_RGB888 ( SDL_Surface *  dst,
int  x,
int  y,
SDL_BlendMode  blendMode,
Uint8  r,
Uint8  g,
Uint8  b,
Uint8  a 
)
static

Definition at line 76 of file SDL_blendpoint.c.

References DRAW_SETPIXELXY_ADD_RGB888, DRAW_SETPIXELXY_BLEND_RGB888, DRAW_SETPIXELXY_MOD_RGB888, DRAW_SETPIXELXY_RGB888, SDL_BLENDMODE_ADD, SDL_BLENDMODE_BLEND, and SDL_BLENDMODE_MOD.

Referenced by SDL_BlendPoint(), and SDL_BlendPoints().

{
unsigned inva = 0xff - a;
switch (blendMode) {
case SDL_BLENDMODE_BLEND:
DRAW_SETPIXELXY_BLEND_RGB888(x, y);
break;
case SDL_BLENDMODE_ADD:
DRAW_SETPIXELXY_ADD_RGB888(x, y);
break;
case SDL_BLENDMODE_MOD:
DRAW_SETPIXELXY_MOD_RGB888(x, y);
break;
default:
DRAW_SETPIXELXY_RGB888(x, y);
break;
}
return 0;
}
static int SDL_BlendPoint_RGBA ( SDL_Surface *  dst,
int  x,
int  y,
SDL_BlendMode  blendMode,
Uint8  r,
Uint8  g,
Uint8  b,
Uint8  a 
)
static

Definition at line 167 of file SDL_blendpoint.c.

References SDL_PixelFormat::BytesPerPixel, DRAW_SETPIXELXY4_ADD_RGBA, DRAW_SETPIXELXY4_BLEND_RGBA, DRAW_SETPIXELXY4_MOD_RGBA, DRAW_SETPIXELXY4_RGBA, SDL_Surface::format, SDL_BLENDMODE_ADD, SDL_BLENDMODE_BLEND, SDL_BLENDMODE_MOD, and SDL_Unsupported.

Referenced by SDL_BlendPoint(), and SDL_BlendPoints().

{
SDL_PixelFormat *fmt = dst->format;
unsigned inva = 0xff - a;
switch (fmt->BytesPerPixel) {
case 4:
switch (blendMode) {
case SDL_BLENDMODE_BLEND:
DRAW_SETPIXELXY4_BLEND_RGBA(x, y);
break;
case SDL_BLENDMODE_ADD:
DRAW_SETPIXELXY4_ADD_RGBA(x, y);
break;
case SDL_BLENDMODE_MOD:
DRAW_SETPIXELXY4_MOD_RGBA(x, y);
break;
default:
DRAW_SETPIXELXY4_RGBA(x, y);
break;
}
return 0;
default:
return SDL_Unsupported();
}
}
int SDL_BlendPoints ( SDL_Surface *  dst,
const SDL_Point *  points,
int  count,
SDL_BlendMode  blendMode,
Uint8  r,
Uint8  g,
Uint8  b,
Uint8  a 
)

Definition at line 257 of file SDL_blendpoint.c.

References SDL_PixelFormat::Amask, SDL_PixelFormat::BitsPerPixel, blendMode, SDL_Surface::clip_rect, DRAW_MUL, SDL_Surface::format, SDL_Rect::h, i, NULL, SDL_PixelFormat::Rmask, SDL_BLENDMODE_ADD, SDL_BLENDMODE_BLEND, SDL_BlendPoint_ARGB8888(), SDL_BlendPoint_RGB(), SDL_BlendPoint_RGB555(), SDL_BlendPoint_RGB565(), SDL_BlendPoint_RGB888(), SDL_BlendPoint_RGBA(), SDL_SetError, SDL_Rect::w, SDL_Point::x, SDL_Rect::x, SDL_Point::y, and SDL_Rect::y.

Referenced by SW_RenderDrawPoints().

{
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;
}