mirror of
https://github.com/libsdl-org/SDL.git
synced 2025-05-31 17:07:39 +00:00
387774ab8a
This is for consistency with CMake build configuration Also added SDL_VIDEO_RENDER_GPU to the non-CMake build configurations
371 lines
11 KiB
C
371 lines
11 KiB
C
/*
|
|
Simple DirectMedia Layer
|
|
Copyright (C) 1997-2024 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"
|
|
|
|
#ifdef SDL_VIDEO_RENDER_SW
|
|
|
|
#include "SDL_draw.h"
|
|
#include "SDL_blendfillrect.h"
|
|
|
|
static bool SDL_BlendFillRect_RGB555(SDL_Surface *dst, const SDL_Rect *rect,
|
|
SDL_BlendMode blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
|
|
{
|
|
unsigned inva = 0xff - a;
|
|
|
|
switch (blendMode) {
|
|
case SDL_BLENDMODE_BLEND:
|
|
FILLRECT(Uint16, DRAW_SETPIXEL_BLEND_RGB555);
|
|
break;
|
|
case SDL_BLENDMODE_BLEND_PREMULTIPLIED:
|
|
FILLRECT(Uint16, DRAW_SETPIXEL_BLEND_CLAMPED_RGB555);
|
|
break;
|
|
case SDL_BLENDMODE_ADD:
|
|
case SDL_BLENDMODE_ADD_PREMULTIPLIED:
|
|
FILLRECT(Uint16, DRAW_SETPIXEL_ADD_RGB555);
|
|
break;
|
|
case SDL_BLENDMODE_MOD:
|
|
FILLRECT(Uint16, DRAW_SETPIXEL_MOD_RGB555);
|
|
break;
|
|
case SDL_BLENDMODE_MUL:
|
|
FILLRECT(Uint16, DRAW_SETPIXEL_MUL_RGB555);
|
|
break;
|
|
default:
|
|
FILLRECT(Uint16, DRAW_SETPIXEL_RGB555);
|
|
break;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static bool SDL_BlendFillRect_RGB565(SDL_Surface *dst, const SDL_Rect *rect,
|
|
SDL_BlendMode blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
|
|
{
|
|
unsigned inva = 0xff - a;
|
|
|
|
switch (blendMode) {
|
|
case SDL_BLENDMODE_BLEND:
|
|
FILLRECT(Uint16, DRAW_SETPIXEL_BLEND_RGB565);
|
|
break;
|
|
case SDL_BLENDMODE_BLEND_PREMULTIPLIED:
|
|
FILLRECT(Uint16, DRAW_SETPIXEL_BLEND_CLAMPED_RGB565);
|
|
break;
|
|
case SDL_BLENDMODE_ADD:
|
|
case SDL_BLENDMODE_ADD_PREMULTIPLIED:
|
|
FILLRECT(Uint16, DRAW_SETPIXEL_ADD_RGB565);
|
|
break;
|
|
case SDL_BLENDMODE_MOD:
|
|
FILLRECT(Uint16, DRAW_SETPIXEL_MOD_RGB565);
|
|
break;
|
|
case SDL_BLENDMODE_MUL:
|
|
FILLRECT(Uint16, DRAW_SETPIXEL_MUL_RGB565);
|
|
break;
|
|
default:
|
|
FILLRECT(Uint16, DRAW_SETPIXEL_RGB565);
|
|
break;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static bool SDL_BlendFillRect_XRGB8888(SDL_Surface *dst, const SDL_Rect *rect,
|
|
SDL_BlendMode blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
|
|
{
|
|
unsigned inva = 0xff - a;
|
|
|
|
switch (blendMode) {
|
|
case SDL_BLENDMODE_BLEND:
|
|
FILLRECT(Uint32, DRAW_SETPIXEL_BLEND_XRGB8888);
|
|
break;
|
|
case SDL_BLENDMODE_BLEND_PREMULTIPLIED:
|
|
FILLRECT(Uint32, DRAW_SETPIXEL_BLEND_CLAMPED_XRGB8888);
|
|
break;
|
|
case SDL_BLENDMODE_ADD:
|
|
case SDL_BLENDMODE_ADD_PREMULTIPLIED:
|
|
FILLRECT(Uint32, DRAW_SETPIXEL_ADD_XRGB8888);
|
|
break;
|
|
case SDL_BLENDMODE_MOD:
|
|
FILLRECT(Uint32, DRAW_SETPIXEL_MOD_XRGB8888);
|
|
break;
|
|
case SDL_BLENDMODE_MUL:
|
|
FILLRECT(Uint32, DRAW_SETPIXEL_MUL_XRGB8888);
|
|
break;
|
|
default:
|
|
FILLRECT(Uint32, DRAW_SETPIXEL_XRGB8888);
|
|
break;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static bool SDL_BlendFillRect_ARGB8888(SDL_Surface *dst, const SDL_Rect *rect,
|
|
SDL_BlendMode blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
|
|
{
|
|
unsigned inva = 0xff - a;
|
|
|
|
switch (blendMode) {
|
|
case SDL_BLENDMODE_BLEND:
|
|
FILLRECT(Uint32, DRAW_SETPIXEL_BLEND_ARGB8888);
|
|
break;
|
|
case SDL_BLENDMODE_BLEND_PREMULTIPLIED:
|
|
FILLRECT(Uint32, DRAW_SETPIXEL_BLEND_CLAMPED_ARGB8888);
|
|
break;
|
|
case SDL_BLENDMODE_ADD:
|
|
case SDL_BLENDMODE_ADD_PREMULTIPLIED:
|
|
FILLRECT(Uint32, DRAW_SETPIXEL_ADD_ARGB8888);
|
|
break;
|
|
case SDL_BLENDMODE_MOD:
|
|
FILLRECT(Uint32, DRAW_SETPIXEL_MOD_ARGB8888);
|
|
break;
|
|
case SDL_BLENDMODE_MUL:
|
|
FILLRECT(Uint32, DRAW_SETPIXEL_MUL_ARGB8888);
|
|
break;
|
|
default:
|
|
FILLRECT(Uint32, DRAW_SETPIXEL_ARGB8888);
|
|
break;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static bool SDL_BlendFillRect_RGB(SDL_Surface *dst, const SDL_Rect *rect,
|
|
SDL_BlendMode blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
|
|
{
|
|
const SDL_PixelFormatDetails *fmt = dst->internal->format;
|
|
unsigned inva = 0xff - a;
|
|
|
|
switch (fmt->bytes_per_pixel) {
|
|
case 2:
|
|
switch (blendMode) {
|
|
case SDL_BLENDMODE_BLEND:
|
|
FILLRECT(Uint16, DRAW_SETPIXEL_BLEND_RGB);
|
|
break;
|
|
case SDL_BLENDMODE_BLEND_PREMULTIPLIED:
|
|
FILLRECT(Uint16, DRAW_SETPIXEL_BLEND_CLAMPED_RGB);
|
|
break;
|
|
case SDL_BLENDMODE_ADD:
|
|
case SDL_BLENDMODE_ADD_PREMULTIPLIED:
|
|
FILLRECT(Uint16, DRAW_SETPIXEL_ADD_RGB);
|
|
break;
|
|
case SDL_BLENDMODE_MOD:
|
|
FILLRECT(Uint16, DRAW_SETPIXEL_MOD_RGB);
|
|
break;
|
|
case SDL_BLENDMODE_MUL:
|
|
FILLRECT(Uint16, DRAW_SETPIXEL_MUL_RGB);
|
|
break;
|
|
default:
|
|
FILLRECT(Uint16, DRAW_SETPIXEL_RGB);
|
|
break;
|
|
}
|
|
return true;
|
|
case 4:
|
|
switch (blendMode) {
|
|
case SDL_BLENDMODE_BLEND:
|
|
FILLRECT(Uint32, DRAW_SETPIXEL_BLEND_RGB);
|
|
break;
|
|
case SDL_BLENDMODE_BLEND_PREMULTIPLIED:
|
|
FILLRECT(Uint32, DRAW_SETPIXEL_BLEND_CLAMPED_RGB);
|
|
break;
|
|
case SDL_BLENDMODE_ADD:
|
|
case SDL_BLENDMODE_ADD_PREMULTIPLIED:
|
|
FILLRECT(Uint32, DRAW_SETPIXEL_ADD_RGB);
|
|
break;
|
|
case SDL_BLENDMODE_MOD:
|
|
FILLRECT(Uint32, DRAW_SETPIXEL_MOD_RGB);
|
|
break;
|
|
case SDL_BLENDMODE_MUL:
|
|
FILLRECT(Uint32, DRAW_SETPIXEL_MUL_RGB);
|
|
break;
|
|
default:
|
|
FILLRECT(Uint32, DRAW_SETPIXEL_RGB);
|
|
break;
|
|
}
|
|
return true;
|
|
default:
|
|
return SDL_Unsupported();
|
|
}
|
|
}
|
|
|
|
static bool SDL_BlendFillRect_RGBA(SDL_Surface *dst, const SDL_Rect *rect,
|
|
SDL_BlendMode blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
|
|
{
|
|
const SDL_PixelFormatDetails *fmt = dst->internal->format;
|
|
unsigned inva = 0xff - a;
|
|
|
|
switch (fmt->bytes_per_pixel) {
|
|
case 4:
|
|
switch (blendMode) {
|
|
case SDL_BLENDMODE_BLEND:
|
|
FILLRECT(Uint32, DRAW_SETPIXEL_BLEND_RGBA);
|
|
break;
|
|
case SDL_BLENDMODE_BLEND_PREMULTIPLIED:
|
|
FILLRECT(Uint32, DRAW_SETPIXEL_BLEND_CLAMPED_RGBA);
|
|
break;
|
|
case SDL_BLENDMODE_ADD:
|
|
case SDL_BLENDMODE_ADD_PREMULTIPLIED:
|
|
FILLRECT(Uint32, DRAW_SETPIXEL_ADD_RGBA);
|
|
break;
|
|
case SDL_BLENDMODE_MOD:
|
|
FILLRECT(Uint32, DRAW_SETPIXEL_MOD_RGBA);
|
|
break;
|
|
case SDL_BLENDMODE_MUL:
|
|
FILLRECT(Uint32, DRAW_SETPIXEL_MUL_RGBA);
|
|
break;
|
|
default:
|
|
FILLRECT(Uint32, DRAW_SETPIXEL_RGBA);
|
|
break;
|
|
}
|
|
return true;
|
|
default:
|
|
return SDL_Unsupported();
|
|
}
|
|
}
|
|
|
|
bool SDL_BlendFillRect(SDL_Surface *dst, const SDL_Rect *rect, SDL_BlendMode blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
|
|
{
|
|
SDL_Rect clipped;
|
|
|
|
if (!SDL_SurfaceValid(dst)) {
|
|
return SDL_InvalidParamError("SDL_BlendFillRect(): dst");
|
|
}
|
|
|
|
// This function doesn't work on surfaces < 8 bpp
|
|
if (SDL_BITSPERPIXEL(dst->format) < 8) {
|
|
return SDL_SetError("SDL_BlendFillRect(): Unsupported surface format");
|
|
}
|
|
|
|
// If 'rect' == NULL, then fill the whole surface
|
|
if (rect) {
|
|
// Perform clipping
|
|
if (!SDL_GetRectIntersection(rect, &dst->internal->clip_rect, &clipped)) {
|
|
return true;
|
|
}
|
|
rect = &clipped;
|
|
} else {
|
|
rect = &dst->internal->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->internal->format->bits_per_pixel) {
|
|
case 15:
|
|
switch (dst->internal->format->Rmask) {
|
|
case 0x7C00:
|
|
return SDL_BlendFillRect_RGB555(dst, rect, blendMode, r, g, b, a);
|
|
}
|
|
break;
|
|
case 16:
|
|
switch (dst->internal->format->Rmask) {
|
|
case 0xF800:
|
|
return SDL_BlendFillRect_RGB565(dst, rect, blendMode, r, g, b, a);
|
|
}
|
|
break;
|
|
case 32:
|
|
switch (dst->internal->format->Rmask) {
|
|
case 0x00FF0000:
|
|
if (!dst->internal->format->Amask) {
|
|
return SDL_BlendFillRect_XRGB8888(dst, rect, blendMode, r, g, b, a);
|
|
} else {
|
|
return SDL_BlendFillRect_ARGB8888(dst, rect, blendMode, r, g, b, a);
|
|
}
|
|
// break; -Wunreachable-code-break
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (!dst->internal->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);
|
|
}
|
|
}
|
|
|
|
bool 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;
|
|
bool (*func)(SDL_Surface * dst, const SDL_Rect *rect, SDL_BlendMode blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a) = NULL;
|
|
bool result = true;
|
|
|
|
if (!SDL_SurfaceValid(dst)) {
|
|
return SDL_InvalidParamError("SDL_BlendFillRects(): dst");
|
|
}
|
|
|
|
// This function doesn't work on surfaces < 8 bpp
|
|
if (dst->internal->format->bits_per_pixel < 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->internal->format->bits_per_pixel) {
|
|
case 15:
|
|
switch (dst->internal->format->Rmask) {
|
|
case 0x7C00:
|
|
func = SDL_BlendFillRect_RGB555;
|
|
}
|
|
break;
|
|
case 16:
|
|
switch (dst->internal->format->Rmask) {
|
|
case 0xF800:
|
|
func = SDL_BlendFillRect_RGB565;
|
|
}
|
|
break;
|
|
case 32:
|
|
switch (dst->internal->format->Rmask) {
|
|
case 0x00FF0000:
|
|
if (!dst->internal->format->Amask) {
|
|
func = SDL_BlendFillRect_XRGB8888;
|
|
} else {
|
|
func = SDL_BlendFillRect_ARGB8888;
|
|
}
|
|
break;
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (!func) {
|
|
if (!dst->internal->format->Amask) {
|
|
func = SDL_BlendFillRect_RGB;
|
|
} else {
|
|
func = SDL_BlendFillRect_RGBA;
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < count; ++i) {
|
|
// Perform clipping
|
|
if (!SDL_GetRectIntersection(&rects[i], &dst->internal->clip_rect, &rect)) {
|
|
continue;
|
|
}
|
|
result = func(dst, &rect, blendMode, r, g, b, a);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
#endif // SDL_VIDEO_RENDER_SW
|