SDL_blendline.c
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/*
Simple DirectMedia Layer
Copyright (C) 1997-2019 Sam Lantinga <slouken@libsdl.org>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#include "../../SDL_internal.h"
#if !SDL_RENDER_DISABLED
#include "SDL_draw.h"
#include "SDL_blendline.h"
#include "SDL_blendpoint.h"
static void
SDL_BlendLine_RGB2(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)
{
const SDL_PixelFormat *fmt = dst->format;
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(Uint16, DRAW_SETPIXEL_BLEND_RGB, draw_end);
break;
case SDL_BLENDMODE_ADD:
HLINE(Uint16, DRAW_SETPIXEL_ADD_RGB, draw_end);
break;
case SDL_BLENDMODE_MOD:
HLINE(Uint16, DRAW_SETPIXEL_MOD_RGB, draw_end);
break;
default:
HLINE(Uint16, DRAW_SETPIXEL_RGB, draw_end);
break;
}
} else if (x1 == x2) {
switch (blendMode) {
case SDL_BLENDMODE_BLEND:
VLINE(Uint16, DRAW_SETPIXEL_BLEND_RGB, draw_end);
break;
case SDL_BLENDMODE_ADD:
VLINE(Uint16, DRAW_SETPIXEL_ADD_RGB, draw_end);
break;
case SDL_BLENDMODE_MOD:
VLINE(Uint16, DRAW_SETPIXEL_MOD_RGB, draw_end);
break;
default:
VLINE(Uint16, DRAW_SETPIXEL_RGB, draw_end);
break;
}
} else if (ABS(x1 - x2) == ABS(y1 - y2)) {
switch (blendMode) {
case SDL_BLENDMODE_BLEND:
DLINE(Uint16, DRAW_SETPIXEL_BLEND_RGB, draw_end);
break;
case SDL_BLENDMODE_ADD:
DLINE(Uint16, DRAW_SETPIXEL_ADD_RGB, draw_end);
break;
case SDL_BLENDMODE_MOD:
DLINE(Uint16, DRAW_SETPIXEL_MOD_RGB, draw_end);
break;
default:
DLINE(Uint16, DRAW_SETPIXEL_RGB, draw_end);
break;
}
} else {
switch (blendMode) {
case SDL_BLENDMODE_BLEND:
AALINE(x1, y1, x2, y2,
DRAW_SETPIXELXY2_BLEND_RGB, DRAW_SETPIXELXY2_BLEND_RGB,
draw_end);
break;
case SDL_BLENDMODE_ADD:
AALINE(x1, y1, x2, y2,
DRAW_SETPIXELXY2_ADD_RGB, DRAW_SETPIXELXY2_ADD_RGB,
draw_end);
break;
case SDL_BLENDMODE_MOD:
AALINE(x1, y1, x2, y2,
DRAW_SETPIXELXY2_MOD_RGB, DRAW_SETPIXELXY2_MOD_RGB,
draw_end);
break;
default:
AALINE(x1, y1, x2, y2,
DRAW_SETPIXELXY2_RGB, DRAW_SETPIXELXY2_BLEND_RGB,
draw_end);
break;
}
}
}
static void
SDL_BlendLine_RGB555(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(Uint16, DRAW_SETPIXEL_BLEND_RGB555, draw_end);
break;
case SDL_BLENDMODE_ADD:
HLINE(Uint16, DRAW_SETPIXEL_ADD_RGB555, draw_end);
break;
case SDL_BLENDMODE_MOD:
HLINE(Uint16, DRAW_SETPIXEL_MOD_RGB555, draw_end);
break;
default:
HLINE(Uint16, DRAW_SETPIXEL_RGB555, draw_end);
break;
}
} else if (x1 == x2) {
switch (blendMode) {
case SDL_BLENDMODE_BLEND:
VLINE(Uint16, DRAW_SETPIXEL_BLEND_RGB555, draw_end);
break;
case SDL_BLENDMODE_ADD:
VLINE(Uint16, DRAW_SETPIXEL_ADD_RGB555, draw_end);
break;
case SDL_BLENDMODE_MOD:
VLINE(Uint16, DRAW_SETPIXEL_MOD_RGB555, draw_end);
break;
default:
VLINE(Uint16, DRAW_SETPIXEL_RGB555, draw_end);
break;
}
} else if (ABS(x1 - x2) == ABS(y1 - y2)) {
switch (blendMode) {
case SDL_BLENDMODE_BLEND:
DLINE(Uint16, DRAW_SETPIXEL_BLEND_RGB555, draw_end);
break;
case SDL_BLENDMODE_ADD:
DLINE(Uint16, DRAW_SETPIXEL_ADD_RGB555, draw_end);
break;
case SDL_BLENDMODE_MOD:
DLINE(Uint16, DRAW_SETPIXEL_MOD_RGB555, draw_end);
break;
default:
DLINE(Uint16, DRAW_SETPIXEL_RGB555, draw_end);
break;
}
} else {
switch (blendMode) {
case SDL_BLENDMODE_BLEND:
AALINE(x1, y1, x2, y2,
DRAW_SETPIXELXY_BLEND_RGB555, DRAW_SETPIXELXY_BLEND_RGB555,
draw_end);
break;
case SDL_BLENDMODE_ADD:
AALINE(x1, y1, x2, y2,
DRAW_SETPIXELXY_ADD_RGB555, DRAW_SETPIXELXY_ADD_RGB555,
draw_end);
break;
case SDL_BLENDMODE_MOD:
AALINE(x1, y1, x2, y2,
DRAW_SETPIXELXY_MOD_RGB555, DRAW_SETPIXELXY_MOD_RGB555,
draw_end);
break;
default:
AALINE(x1, y1, x2, y2,
DRAW_SETPIXELXY_RGB555, DRAW_SETPIXELXY_BLEND_RGB555,
draw_end);
break;
}
}
}
static void
SDL_BlendLine_RGB565(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(Uint16, DRAW_SETPIXEL_BLEND_RGB565, draw_end);
break;
case SDL_BLENDMODE_ADD:
HLINE(Uint16, DRAW_SETPIXEL_ADD_RGB565, draw_end);
break;
case SDL_BLENDMODE_MOD:
HLINE(Uint16, DRAW_SETPIXEL_MOD_RGB565, draw_end);
break;
default:
HLINE(Uint16, DRAW_SETPIXEL_RGB565, draw_end);
break;
}
} else if (x1 == x2) {
switch (blendMode) {
case SDL_BLENDMODE_BLEND:
VLINE(Uint16, DRAW_SETPIXEL_BLEND_RGB565, draw_end);
break;
case SDL_BLENDMODE_ADD:
VLINE(Uint16, DRAW_SETPIXEL_ADD_RGB565, draw_end);
break;
case SDL_BLENDMODE_MOD:
VLINE(Uint16, DRAW_SETPIXEL_MOD_RGB565, draw_end);
break;
default:
VLINE(Uint16, DRAW_SETPIXEL_RGB565, draw_end);
break;
}
} else if (ABS(x1 - x2) == ABS(y1 - y2)) {
switch (blendMode) {
case SDL_BLENDMODE_BLEND:
DLINE(Uint16, DRAW_SETPIXEL_BLEND_RGB565, draw_end);
break;
case SDL_BLENDMODE_ADD:
DLINE(Uint16, DRAW_SETPIXEL_ADD_RGB565, draw_end);
break;
case SDL_BLENDMODE_MOD:
DLINE(Uint16, DRAW_SETPIXEL_MOD_RGB565, draw_end);
break;
default:
DLINE(Uint16, DRAW_SETPIXEL_RGB565, draw_end);
break;
}
} else {
switch (blendMode) {
case SDL_BLENDMODE_BLEND:
AALINE(x1, y1, x2, y2,
DRAW_SETPIXELXY_BLEND_RGB565, DRAW_SETPIXELXY_BLEND_RGB565,
draw_end);
break;
case SDL_BLENDMODE_ADD:
AALINE(x1, y1, x2, y2,
DRAW_SETPIXELXY_ADD_RGB565, DRAW_SETPIXELXY_ADD_RGB565,
draw_end);
break;
case SDL_BLENDMODE_MOD:
AALINE(x1, y1, x2, y2,
DRAW_SETPIXELXY_MOD_RGB565, DRAW_SETPIXELXY_MOD_RGB565,
draw_end);
break;
default:
AALINE(x1, y1, x2, y2,
DRAW_SETPIXELXY_RGB565, DRAW_SETPIXELXY_BLEND_RGB565,
draw_end);
break;
}
}
}
static void
SDL_BlendLine_RGB4(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)
{
const SDL_PixelFormat *fmt = dst->format;
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_RGB, draw_end);
break;
case SDL_BLENDMODE_ADD:
HLINE(Uint32, DRAW_SETPIXEL_ADD_RGB, draw_end);
break;
case SDL_BLENDMODE_MOD:
HLINE(Uint32, DRAW_SETPIXEL_MOD_RGB, draw_end);
break;
default:
HLINE(Uint32, DRAW_SETPIXEL_RGB, draw_end);
break;
}
} else if (x1 == x2) {
switch (blendMode) {
case SDL_BLENDMODE_BLEND:
VLINE(Uint32, DRAW_SETPIXEL_BLEND_RGB, draw_end);
break;
case SDL_BLENDMODE_ADD:
VLINE(Uint32, DRAW_SETPIXEL_ADD_RGB, draw_end);
break;
case SDL_BLENDMODE_MOD:
VLINE(Uint32, DRAW_SETPIXEL_MOD_RGB, draw_end);
break;
default:
VLINE(Uint32, DRAW_SETPIXEL_RGB, draw_end);
break;
}
} else if (ABS(x1 - x2) == ABS(y1 - y2)) {
switch (blendMode) {
case SDL_BLENDMODE_BLEND:
DLINE(Uint32, DRAW_SETPIXEL_BLEND_RGB, draw_end);
break;
case SDL_BLENDMODE_ADD:
DLINE(Uint32, DRAW_SETPIXEL_ADD_RGB, draw_end);
break;
case SDL_BLENDMODE_MOD:
DLINE(Uint32, DRAW_SETPIXEL_MOD_RGB, draw_end);
break;
default:
DLINE(Uint32, DRAW_SETPIXEL_RGB, draw_end);
break;
}
} else {
switch (blendMode) {
case SDL_BLENDMODE_BLEND:
AALINE(x1, y1, x2, y2,
DRAW_SETPIXELXY4_BLEND_RGB, DRAW_SETPIXELXY4_BLEND_RGB,
draw_end);
break;
case SDL_BLENDMODE_ADD:
AALINE(x1, y1, x2, y2,
DRAW_SETPIXELXY4_ADD_RGB, DRAW_SETPIXELXY4_ADD_RGB,
draw_end);
break;
case SDL_BLENDMODE_MOD:
AALINE(x1, y1, x2, y2,
DRAW_SETPIXELXY4_MOD_RGB, DRAW_SETPIXELXY4_MOD_RGB,
draw_end);
break;
default:
AALINE(x1, y1, x2, y2,
DRAW_SETPIXELXY4_RGB, DRAW_SETPIXELXY4_BLEND_RGB,
draw_end);
break;
}
}
}
static void
SDL_BlendLine_RGBA4(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)
{
const SDL_PixelFormat *fmt = dst->format;
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_RGBA, draw_end);
break;
case SDL_BLENDMODE_ADD:
HLINE(Uint32, DRAW_SETPIXEL_ADD_RGBA, draw_end);
break;
case SDL_BLENDMODE_MOD:
HLINE(Uint32, DRAW_SETPIXEL_MOD_RGBA, draw_end);
break;
default:
HLINE(Uint32, DRAW_SETPIXEL_RGBA, draw_end);
break;
}
} else if (x1 == x2) {
switch (blendMode) {
case SDL_BLENDMODE_BLEND:
VLINE(Uint32, DRAW_SETPIXEL_BLEND_RGBA, draw_end);
break;
case SDL_BLENDMODE_ADD:
VLINE(Uint32, DRAW_SETPIXEL_ADD_RGBA, draw_end);
break;
case SDL_BLENDMODE_MOD:
VLINE(Uint32, DRAW_SETPIXEL_MOD_RGBA, draw_end);
break;
default:
VLINE(Uint32, DRAW_SETPIXEL_RGBA, draw_end);
break;
}
} else if (ABS(x1 - x2) == ABS(y1 - y2)) {
switch (blendMode) {
case SDL_BLENDMODE_BLEND:
DLINE(Uint32, DRAW_SETPIXEL_BLEND_RGBA, draw_end);
break;
case SDL_BLENDMODE_ADD:
DLINE(Uint32, DRAW_SETPIXEL_ADD_RGBA, draw_end);
break;
case SDL_BLENDMODE_MOD:
DLINE(Uint32, DRAW_SETPIXEL_MOD_RGBA, draw_end);
break;
default:
DLINE(Uint32, DRAW_SETPIXEL_RGBA, draw_end);
break;
}
} else {
switch (blendMode) {
case SDL_BLENDMODE_BLEND:
AALINE(x1, y1, x2, y2,
DRAW_SETPIXELXY4_BLEND_RGBA, DRAW_SETPIXELXY4_BLEND_RGBA,
draw_end);
break;
case SDL_BLENDMODE_ADD:
AALINE(x1, y1, x2, y2,
DRAW_SETPIXELXY4_ADD_RGBA, DRAW_SETPIXELXY4_ADD_RGBA,
draw_end);
break;
case SDL_BLENDMODE_MOD:
AALINE(x1, y1, x2, y2,
DRAW_SETPIXELXY4_MOD_RGBA, DRAW_SETPIXELXY4_MOD_RGBA,
draw_end);
break;
default:
AALINE(x1, y1, x2, y2,
DRAW_SETPIXELXY4_RGBA, DRAW_SETPIXELXY4_BLEND_RGBA,
draw_end);
break;
}
}
}
static void
SDL_BlendLine_RGB888(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_RGB888, draw_end);
break;
case SDL_BLENDMODE_ADD:
HLINE(Uint32, DRAW_SETPIXEL_ADD_RGB888, draw_end);
break;
case SDL_BLENDMODE_MOD:
HLINE(Uint32, DRAW_SETPIXEL_MOD_RGB888, draw_end);
break;
default:
HLINE(Uint32, DRAW_SETPIXEL_RGB888, draw_end);
break;
}
} else if (x1 == x2) {
switch (blendMode) {
case SDL_BLENDMODE_BLEND:
VLINE(Uint32, DRAW_SETPIXEL_BLEND_RGB888, draw_end);
break;
case SDL_BLENDMODE_ADD:
VLINE(Uint32, DRAW_SETPIXEL_ADD_RGB888, draw_end);
break;
case SDL_BLENDMODE_MOD:
VLINE(Uint32, DRAW_SETPIXEL_MOD_RGB888, draw_end);
break;
default:
VLINE(Uint32, DRAW_SETPIXEL_RGB888, draw_end);
break;
}
} else if (ABS(x1 - x2) == ABS(y1 - y2)) {
switch (blendMode) {
case SDL_BLENDMODE_BLEND:
DLINE(Uint32, DRAW_SETPIXEL_BLEND_RGB888, draw_end);
break;
case SDL_BLENDMODE_ADD:
DLINE(Uint32, DRAW_SETPIXEL_ADD_RGB888, draw_end);
break;
case SDL_BLENDMODE_MOD:
DLINE(Uint32, DRAW_SETPIXEL_MOD_RGB888, draw_end);
break;
default:
DLINE(Uint32, DRAW_SETPIXEL_RGB888, draw_end);
break;
}
} else {
switch (blendMode) {
case SDL_BLENDMODE_BLEND:
AALINE(x1, y1, x2, y2,
DRAW_SETPIXELXY_BLEND_RGB888, DRAW_SETPIXELXY_BLEND_RGB888,
draw_end);
break;
case SDL_BLENDMODE_ADD:
AALINE(x1, y1, x2, y2,
DRAW_SETPIXELXY_ADD_RGB888, DRAW_SETPIXELXY_ADD_RGB888,
draw_end);
break;
case SDL_BLENDMODE_MOD:
AALINE(x1, y1, x2, y2,
DRAW_SETPIXELXY_MOD_RGB888, DRAW_SETPIXELXY_MOD_RGB888,
draw_end);
break;
default:
AALINE(x1, y1, x2, y2,
DRAW_SETPIXELXY_RGB888, DRAW_SETPIXELXY_BLEND_RGB888,
draw_end);
break;
}
}
}
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;
}
}
}
typedef void (*BlendLineFunc) (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);
static BlendLineFunc
SDL_CalculateBlendLineFunc(const SDL_PixelFormat * fmt)
{
switch (fmt->BytesPerPixel) {
case 2:
if (fmt->Rmask == 0x7C00) {
return SDL_BlendLine_RGB555;
} else if (fmt->Rmask == 0xF800) {
return SDL_BlendLine_RGB565;
} else {
return SDL_BlendLine_RGB2;
}
/* break; -Wunreachable-code-break */
case 4:
if (fmt->Rmask == 0x00FF0000) {
if (fmt->Amask) {
return SDL_BlendLine_ARGB8888;
} else {
return SDL_BlendLine_RGB888;
}
} else {
if (fmt->Amask) {
return SDL_BlendLine_RGBA4;
} else {
return SDL_BlendLine_RGB4;
}
}
}
return NULL;
}
int
SDL_BlendLine(SDL_Surface * dst, int x1, int y1, int x2, int y2,
SDL_BlendMode blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
{
BlendLineFunc func;
if (!dst) {
return SDL_SetError("SDL_BlendLine(): Passed NULL destination surface");
}
func = SDL_CalculateBlendLineFunc(dst->format);
if (!func) {
return SDL_SetError("SDL_BlendLine(): Unsupported surface format");
}
/* Perform clipping */
/* FIXME: We don't actually want to clip, as it may change line slope */
if (!SDL_IntersectRectAndLine(&dst->clip_rect, &x1, &y1, &x2, &y2)) {
return 0;
}
func(dst, x1, y1, x2, y2, blendMode, r, g, b, a, SDL_TRUE);
return 0;
}
int
SDL_BlendLines(SDL_Surface * dst, const SDL_Point * points, int count,
SDL_BlendMode blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
{
int i;
int x1, y1;
int x2, y2;
SDL_bool draw_end;
BlendLineFunc func;
if (!dst) {
return SDL_SetError("SDL_BlendLines(): Passed NULL destination surface");
}
func = SDL_CalculateBlendLineFunc(dst->format);
if (!func) {
return SDL_SetError("SDL_BlendLines(): Unsupported surface format");
}
for (i = 1; i < count; ++i) {
x1 = points[i-1].x;
y1 = points[i-1].y;
x2 = points[i].x;
y2 = points[i].y;
/* Perform clipping */
/* FIXME: We don't actually want to clip, as it may change line slope */
if (!SDL_IntersectRectAndLine(&dst->clip_rect, &x1, &y1, &x2, &y2)) {
continue;
}
/* Draw the end if it was clipped */
draw_end = (x2 != points[i].x || y2 != points[i].y);
func(dst, x1, y1, x2, y2, blendMode, r, g, b, a, draw_end);
}
if (points[0].x != points[count-1].x || points[0].y != points[count-1].y) {
SDL_BlendPoint(dst, points[count-1].x, points[count-1].y,
blendMode, r, g, b, a);
}
return 0;
}
#endif /* !SDL_RENDER_DISABLED */
/* vi: set ts=4 sw=4 expandtab: */
DLINE
#define DLINE(type, op, draw_end)
Definition: SDL_draw.h:340
points
GLfixed GLfixed GLint GLint GLfixed points
Definition: SDL_opengl_glext.h:4558
ABS
#define ABS(_x)
Definition: SDL_draw.h:293
Uint32
uint32_t Uint32
Definition: SDL_stdinc.h:203
SDL_blendline.h
DRAW_SETPIXEL_ARGB8888
#define DRAW_SETPIXEL_ARGB8888
Definition: SDL_draw.h:187
SDL_PixelFormat::BytesPerPixel
Uint8 BytesPerPixel
Definition: SDL_pixels.h:320
blendMode
static SDL_BlendMode blendMode
Definition: testdraw2.c:34
DRAW_SETPIXELXY_ARGB8888
#define DRAW_SETPIXELXY_ARGB8888(x, y)
Definition: SDL_draw.h:202
SDL_Surface
A collection of pixels used in software blitting.
Definition: SDL_surface.h:70
DRAW_SETPIXEL_RGB
#define DRAW_SETPIXEL_RGB
Definition: SDL_draw.h:218
SDL_BlendLine_RGB565
static void SDL_BlendLine_RGB565(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)
Definition: SDL_blendline.c:214
SDL_BLENDMODE_ADD
@ SDL_BLENDMODE_ADD
Definition: SDL_blendmode.h:47
NULL
#define NULL
Definition: begin_code.h:167
SDL_PixelFormat::format
Uint32 format
Definition: SDL_pixels.h:317
b
GLboolean GLboolean GLboolean b
Definition: SDL_opengl_glext.h:1109
DRAW_SETPIXELXY4_BLEND_RGBA
#define DRAW_SETPIXELXY4_BLEND_RGBA(x, y)
Definition: SDL_draw.h:280
g
GLboolean GLboolean g
Definition: SDL_opengl_glext.h:1109
SDL_BlendLine_RGB888
static void SDL_BlendLine_RGB888(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)
Definition: SDL_blendline.c:489
count
GLuint GLuint GLsizei count
Definition: SDL_opengl.h:1571
DRAW_SETPIXEL_BLEND_ARGB8888
#define DRAW_SETPIXEL_BLEND_ARGB8888
Definition: SDL_draw.h:190
DRAW_SETPIXEL_BLEND_RGB888
#define DRAW_SETPIXEL_BLEND_RGB888
Definition: SDL_draw.h:159
DRAW_SETPIXELXY4_RGB
#define DRAW_SETPIXELXY4_RGB(x, y)
Definition: SDL_draw.h:236
DRAW_SETPIXELXY2_ADD_RGB
#define DRAW_SETPIXELXY2_ADD_RGB(x, y)
Definition: SDL_draw.h:245
SDL_BlendLine
int SDL_BlendLine(SDL_Surface *dst, int x1, int y1, int x2, int y2, SDL_BlendMode blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
Definition: SDL_blendline.c:708
r
GLdouble GLdouble GLdouble r
Definition: SDL_opengl.h:2079
DRAW_SETPIXEL_BLEND_RGB555
#define DRAW_SETPIXEL_BLEND_RGB555
Definition: SDL_draw.h:97
DRAW_SETPIXEL_BLEND_RGB565
#define DRAW_SETPIXEL_BLEND_RGB565
Definition: SDL_draw.h:128
DRAW_SETPIXELXY2_RGB
#define DRAW_SETPIXELXY2_RGB(x, y)
Definition: SDL_draw.h:233
DRAW_SETPIXEL_RGB555
#define DRAW_SETPIXEL_RGB555
Definition: SDL_draw.h:94
SDL_PixelFormat::Rmask
Uint32 Rmask
Definition: SDL_pixels.h:322
x1
GLuint GLfloat GLfloat GLfloat x1
Definition: SDL_opengl_glext.h:8583
a
GLboolean GLboolean GLboolean GLboolean a
Definition: SDL_opengl_glext.h:1109
SDL_BlendLines
int SDL_BlendLines(SDL_Surface *dst, const SDL_Point *points, int count, SDL_BlendMode blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
Definition: SDL_blendline.c:733
func
GLenum func
Definition: SDL_opengl_glext.h:657
DRAW_SETPIXEL_BLEND_RGBA
#define DRAW_SETPIXEL_BLEND_RGBA
Definition: SDL_draw.h:265
SDL_BlendLine_RGBA4
static void SDL_BlendLine_RGBA4(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)
Definition: SDL_blendline.c:397
DRAW_SETPIXELXY_RGB888
#define DRAW_SETPIXELXY_RGB888(x, y)
Definition: SDL_draw.h:171
DRAW_SETPIXEL_ADD_RGB
#define DRAW_SETPIXEL_ADD_RGB
Definition: SDL_draw.h:225
dst
GLenum GLenum dst
Definition: SDL_opengl_glext.h:1737
DRAW_SETPIXEL_MOD_ARGB8888
#define DRAW_SETPIXEL_MOD_ARGB8888
Definition: SDL_draw.h:198
DRAW_SETPIXELXY_ADD_RGB555
#define DRAW_SETPIXELXY_ADD_RGB555(x, y)
Definition: SDL_draw.h:115
SDL_BLENDMODE_MOD
@ SDL_BLENDMODE_MOD
Definition: SDL_blendmode.h:50
DRAW_SETPIXEL_MOD_RGB888
#define DRAW_SETPIXEL_MOD_RGB888
Definition: SDL_draw.h:167
DRAW_SETPIXELXY_ADD_RGB565
#define DRAW_SETPIXELXY_ADD_RGB565(x, y)
Definition: SDL_draw.h:146
DRAW_SETPIXELXY2_MOD_RGB
#define DRAW_SETPIXELXY2_MOD_RGB(x, y)
Definition: SDL_draw.h:251
x
GLint GLint GLint GLint GLint x
Definition: SDL_opengl.h:1574
VLINE
#define VLINE(type, op, draw_end)
Definition: SDL_draw.h:318
DRAW_SETPIXELXY4_MOD_RGBA
#define DRAW_SETPIXELXY4_MOD_RGBA(x, y)
Definition: SDL_draw.h:286
AALINE
#define AALINE(x1, y1, x2, y2, opaque_op, blend_op, draw_end)
Definition: SDL_draw.h:537
SDL_draw.h
SDL_blendpoint.h
DRAW_SETPIXEL_RGB565
#define DRAW_SETPIXEL_RGB565
Definition: SDL_draw.h:125
DRAW_SETPIXELXY_MOD_RGB888
#define DRAW_SETPIXELXY_MOD_RGB888(x, y)
Definition: SDL_draw.h:180
DRAW_SETPIXEL_ADD_RGB888
#define DRAW_SETPIXEL_ADD_RGB888
Definition: SDL_draw.h:163
DRAW_SETPIXELXY4_ADD_RGB
#define DRAW_SETPIXELXY4_ADD_RGB(x, y)
Definition: SDL_draw.h:248
DRAW_SETPIXELXY_MOD_ARGB8888
#define DRAW_SETPIXELXY_MOD_ARGB8888(x, y)
Definition: SDL_draw.h:211
SDL_BlendPoint
int SDL_BlendPoint(SDL_Surface *dst, int x, int y, SDL_BlendMode blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
Definition: SDL_blendpoint.c:196
Uint16
uint16_t Uint16
Definition: SDL_stdinc.h:191
DRAW_SETPIXEL_ADD_RGB565
#define DRAW_SETPIXEL_ADD_RGB565
Definition: SDL_draw.h:132
DRAW_SETPIXELXY_BLEND_ARGB8888
#define DRAW_SETPIXELXY_BLEND_ARGB8888(x, y)
Definition: SDL_draw.h:205
DRAW_SETPIXEL_MOD_RGB
#define DRAW_SETPIXEL_MOD_RGB
Definition: SDL_draw.h:229
DRAW_SETPIXELXY_ADD_ARGB8888
#define DRAW_SETPIXELXY_ADD_ARGB8888(x, y)
Definition: SDL_draw.h:208
DRAW_SETPIXEL_ADD_RGBA
#define DRAW_SETPIXEL_ADD_RGBA
Definition: SDL_draw.h:269
DRAW_SETPIXEL_MOD_RGB565
#define DRAW_SETPIXEL_MOD_RGB565
Definition: SDL_draw.h:136
SDL_PixelFormat::Amask
Uint32 Amask
Definition: SDL_pixels.h:325
BlendLineFunc
void(* BlendLineFunc)(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)
Definition: SDL_blendline.c:670
DRAW_SETPIXELXY_BLEND_RGB565
#define DRAW_SETPIXELXY_BLEND_RGB565(x, y)
Definition: SDL_draw.h:143
DRAW_SETPIXELXY_RGB555
#define DRAW_SETPIXELXY_RGB555(x, y)
Definition: SDL_draw.h:109
SDL_BlendLine_RGB4
static void SDL_BlendLine_RGB4(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)
Definition: SDL_blendline.c:305
SDL_PixelFormat
Definition: SDL_pixels.h:315
DRAW_SETPIXEL_BLEND_RGB
#define DRAW_SETPIXEL_BLEND_RGB
Definition: SDL_draw.h:221
DRAW_MUL
#define DRAW_MUL(_a, _b)
Definition: SDL_draw.h:29
DRAW_SETPIXELXY4_RGBA
#define DRAW_SETPIXELXY4_RGBA(x, y)
Definition: SDL_draw.h:277
DRAW_SETPIXELXY2_BLEND_RGB
#define DRAW_SETPIXELXY2_BLEND_RGB(x, y)
Definition: SDL_draw.h:239
DRAW_SETPIXELXY_MOD_RGB565
#define DRAW_SETPIXELXY_MOD_RGB565(x, y)
Definition: SDL_draw.h:149
SDL_BLENDMODE_BLEND
@ SDL_BLENDMODE_BLEND
Definition: SDL_blendmode.h:44
y
GLint GLint GLint GLint GLint GLint y
Definition: SDL_opengl.h:1574
DRAW_SETPIXELXY4_MOD_RGB
#define DRAW_SETPIXELXY4_MOD_RGB(x, y)
Definition: SDL_draw.h:254
DRAW_SETPIXEL_ADD_ARGB8888
#define DRAW_SETPIXEL_ADD_ARGB8888
Definition: SDL_draw.h:194
DRAW_SETPIXEL_MOD_RGBA
#define DRAW_SETPIXEL_MOD_RGBA
Definition: SDL_draw.h:273
SDL_BlendLine_ARGB8888
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)
Definition: SDL_blendline.c:580
SDL_TRUE
@ SDL_TRUE
Definition: SDL_stdinc.h:164
DRAW_SETPIXELXY_MOD_RGB555
#define DRAW_SETPIXELXY_MOD_RGB555(x, y)
Definition: SDL_draw.h:118
SDL_Point
The structure that defines a point (integer)
Definition: SDL_rect.h:48
x2
GLfixed GLfixed x2
Definition: SDL_opengl_glext.h:4583
SDL_SetError
#define SDL_SetError
Definition: SDL_dynapi_overrides.h:30
DRAW_SETPIXELXY_BLEND_RGB888
#define DRAW_SETPIXELXY_BLEND_RGB888(x, y)
Definition: SDL_draw.h:174
SDL_BlendLine_RGB555
static void SDL_BlendLine_RGB555(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)
Definition: SDL_blendline.c:123
DRAW_SETPIXELXY4_BLEND_RGB
#define DRAW_SETPIXELXY4_BLEND_RGB(x, y)
Definition: SDL_draw.h:242
DRAW_SETPIXELXY_BLEND_RGB555
#define DRAW_SETPIXELXY_BLEND_RGB555(x, y)
Definition: SDL_draw.h:112
DRAW_SETPIXEL_RGBA
#define DRAW_SETPIXEL_RGBA
Definition: SDL_draw.h:262
y1
GLfixed y1
Definition: SDL_opengl_glext.h:4583
y2
GLfixed GLfixed GLfixed y2
Definition: SDL_opengl_glext.h:4583
DRAW_SETPIXELXY_RGB565
#define DRAW_SETPIXELXY_RGB565(x, y)
Definition: SDL_draw.h:140
SDL_CalculateBlendLineFunc
static BlendLineFunc SDL_CalculateBlendLineFunc(const SDL_PixelFormat *fmt)
Definition: SDL_blendline.c:677
DRAW_SETPIXELXY_ADD_RGB888
#define DRAW_SETPIXELXY_ADD_RGB888(x, y)
Definition: SDL_draw.h:177
HLINE
#define HLINE(type, op, draw_end)
Definition: SDL_draw.h:296
SDL_IntersectRectAndLine
#define SDL_IntersectRectAndLine
Definition: SDL_dynapi_overrides.h:297
SDL_BlendLine_RGB2
static void SDL_BlendLine_RGB2(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)
Definition: SDL_blendline.c:31
DRAW_SETPIXEL_RGB888
#define DRAW_SETPIXEL_RGB888
Definition: SDL_draw.h:156
void
const SDL_PRINTF_FORMAT_STRING char int const SDL_PRINTF_FORMAT_STRING char int const SDL_PRINTF_FORMAT_STRING char int const SDL_PRINTF_FORMAT_STRING char const char const SDL_SCANF_FORMAT_STRING char return SDL_ThreadFunction const char void return Uint32 return Uint32 void
Definition: SDL_dynapi_procs.h:89
SDL_BlendMode
SDL_BlendMode
The blend mode used in SDL_RenderCopy() and drawing operations.
Definition: SDL_blendmode.h:40
i
return Display return Display Bool Bool int int int return Display XEvent Bool(*) XPointer return Display return Display Drawable _Xconst char unsigned int unsigned int return Display Pixmap Pixmap XColor XColor unsigned int unsigned int return Display _Xconst char char int char return Display Visual unsigned int int int char unsigned int unsigned int in i)
Definition: SDL_x11sym.h:50
DRAW_SETPIXELXY4_ADD_RGBA
#define DRAW_SETPIXELXY4_ADD_RGBA(x, y)
Definition: SDL_draw.h:283
DRAW_SETPIXEL_MOD_RGB555
#define DRAW_SETPIXEL_MOD_RGB555
Definition: SDL_draw.h:105
SDL_bool
SDL_bool
Definition: SDL_stdinc.h:161
DRAW_SETPIXEL_ADD_RGB555
#define DRAW_SETPIXEL_ADD_RGB555
Definition: SDL_draw.h:101
Uint8
uint8_t Uint8
Definition: SDL_stdinc.h:179