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SDL_renderer_sw.c
638 lines (569 loc) · 20.8 KB
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/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997-2006 Sam Lantinga
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Sam Lantinga
slouken@libsdl.org
*/
#include "SDL_config.h"
#include "SDL_video.h"
#include "SDL_sysvideo.h"
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#include "SDL_pixels_c.h"
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#include "SDL_rect_c.h"
#include "SDL_yuv_sw_c.h"
/* SDL surface based renderer implementation */
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static SDL_Renderer *SW_CreateRenderer(SDL_Window * window, Uint32 flags);
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static int SW_ActivateRenderer(SDL_Renderer * renderer);
static int SW_DisplayModeChanged(SDL_Renderer * renderer);
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static int SW_CreateTexture(SDL_Renderer * renderer, SDL_Texture * texture);
static int SW_QueryTexturePixels(SDL_Renderer * renderer,
SDL_Texture * texture, void **pixels,
int *pitch);
static int SW_SetTexturePalette(SDL_Renderer * renderer,
SDL_Texture * texture,
const SDL_Color * colors, int firstcolor,
int ncolors);
static int SW_GetTexturePalette(SDL_Renderer * renderer,
SDL_Texture * texture, SDL_Color * colors,
int firstcolor, int ncolors);
static int SW_UpdateTexture(SDL_Renderer * renderer,
SDL_Texture * texture, const SDL_Rect * rect,
const void *pixels, int pitch);
static int SW_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * rect, int markDirty,
void **pixels, int *pitch);
static void SW_UnlockTexture(SDL_Renderer * renderer, SDL_Texture * texture);
static void SW_DirtyTexture(SDL_Renderer * renderer,
SDL_Texture * texture, int numrects,
const SDL_Rect * rects);
static int SW_RenderFill(SDL_Renderer * renderer, const SDL_Rect * rect,
Uint32 color);
static int SW_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * srcrect,
const SDL_Rect * dstrect, int blendMode,
int scaleMode);
static void SW_RenderPresent(SDL_Renderer * renderer);
static void SW_DestroyTexture(SDL_Renderer * renderer, SDL_Texture * texture);
static void SW_DestroyRenderer(SDL_Renderer * renderer);
SDL_RenderDriver SW_RenderDriver = {
SW_CreateRenderer,
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{
"software",
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(SDL_RENDERER_SINGLEBUFFER | SDL_RENDERER_PRESENTCOPY |
SDL_RENDERER_PRESENTFLIP2 | SDL_RENDERER_PRESENTFLIP3 |
SDL_RENDERER_PRESENTDISCARD | SDL_RENDERER_PRESENTVSYNC),
(SDL_TEXTUREBLENDMODE_NONE | SDL_TEXTUREBLENDMODE_MASK |
SDL_TEXTUREBLENDMODE_BLEND),
(SDL_TEXTURESCALEMODE_NONE | SDL_TEXTURESCALEMODE_FAST),
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{
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SDL_PIXELFORMAT_INDEX8,
SDL_PIXELFORMAT_RGB555,
SDL_PIXELFORMAT_RGB565,
SDL_PIXELFORMAT_RGB888,
SDL_PIXELFORMAT_BGR888,
SDL_PIXELFORMAT_ARGB8888,
SDL_PIXELFORMAT_RGBA8888,
SDL_PIXELFORMAT_ABGR8888,
SDL_PIXELFORMAT_BGRA8888,
SDL_PIXELFORMAT_YUY2,
SDL_PIXELFORMAT_UYVY},
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0,
0}
};
typedef struct
{
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Uint32 format;
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SDL_bool updateSize;
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int current_texture;
SDL_Texture *texture[3];
SDL_Surface surface;
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SDL_Renderer *renderer;
SDL_DirtyRectList dirty;
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} SW_RenderData;
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static SDL_Texture *
CreateTexture(SDL_Renderer * renderer, Uint32 format, int w, int h)
{
SDL_Texture *texture;
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texture = (SDL_Texture *) SDL_calloc(1, sizeof(*texture));
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if (!texture) {
SDL_OutOfMemory();
return NULL;
}
texture->format = format;
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texture->access = SDL_TEXTUREACCESS_LOCAL;
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texture->w = w;
texture->h = h;
texture->renderer = renderer;
if (renderer->CreateTexture(renderer, texture) < 0) {
SDL_free(texture);
return NULL;
}
return texture;
}
static void
DestroyTexture(SDL_Renderer * renderer, SDL_Texture * texture)
{
renderer->DestroyTexture(renderer, texture);
SDL_free(texture);
}
static int
DisplayPaletteChanged(void *userdata, SDL_Palette * palette)
{
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SW_RenderData *data = (SW_RenderData *) userdata;
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int i;
for (i = 0; i < SDL_arraysize(data->texture); ++i) {
if (data->texture[i] && data->renderer->SetTexturePalette) {
data->renderer->SetTexturePalette(data->renderer,
data->texture[i],
palette->colors, 0,
palette->ncolors);
}
}
return 0;
}
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SDL_Renderer *
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SW_CreateRenderer(SDL_Window * window, Uint32 flags)
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{
SDL_VideoDisplay *display = SDL_GetDisplayFromWindow(window);
SDL_DisplayMode *displayMode = &display->current_mode;
SDL_Renderer *renderer;
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SW_RenderData *data;
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int i, n;
int bpp;
Uint32 Rmask, Gmask, Bmask, Amask;
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Uint32 renderer_flags;
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const char *desired_driver;
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if (!SDL_PixelFormatEnumToMasks
(displayMode->format, &bpp, &Rmask, &Gmask, &Bmask, &Amask)) {
SDL_SetError("Unknown display format");
return NULL;
}
renderer = (SDL_Renderer *) SDL_calloc(1, sizeof(*renderer));
if (!renderer) {
SDL_OutOfMemory();
return NULL;
}
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data = (SW_RenderData *) SDL_calloc(1, sizeof(*data));
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if (!data) {
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SW_DestroyRenderer(renderer);
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SDL_OutOfMemory();
return NULL;
}
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renderer->ActivateRenderer = SW_ActivateRenderer;
renderer->DisplayModeChanged = SW_DisplayModeChanged;
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renderer->CreateTexture = SW_CreateTexture;
renderer->QueryTexturePixels = SW_QueryTexturePixels;
renderer->SetTexturePalette = SW_SetTexturePalette;
renderer->GetTexturePalette = SW_GetTexturePalette;
renderer->UpdateTexture = SW_UpdateTexture;
renderer->LockTexture = SW_LockTexture;
renderer->UnlockTexture = SW_UnlockTexture;
renderer->DirtyTexture = SW_DirtyTexture;
renderer->RenderFill = SW_RenderFill;
renderer->RenderCopy = SW_RenderCopy;
renderer->RenderPresent = SW_RenderPresent;
renderer->DestroyTexture = SW_DestroyTexture;
renderer->DestroyRenderer = SW_DestroyRenderer;
renderer->info = SW_RenderDriver.info;
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renderer->window = window->id;
renderer->driverdata = data;
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renderer->info.flags = 0;
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if (flags & SDL_RENDERER_PRESENTFLIP2) {
renderer->info.flags |= SDL_RENDERER_PRESENTFLIP2;
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n = 2;
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} else if (flags & SDL_RENDERER_PRESENTFLIP3) {
renderer->info.flags |= SDL_RENDERER_PRESENTFLIP3;
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n = 3;
} else {
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renderer->info.flags |= SDL_RENDERER_PRESENTCOPY;
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n = 1;
}
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data->format = displayMode->format;
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/* Find a render driver that we can use to display data */
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renderer_flags = (SDL_RENDERER_SINGLEBUFFER |
SDL_RENDERER_PRESENTDISCARD);
if (flags & SDL_RENDERER_PRESENTVSYNC) {
renderer_flags |= SDL_RENDERER_PRESENTVSYNC;
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}
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desired_driver = SDL_getenv("SDL_VIDEO_RENDERER_SWDRIVER");
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for (i = 0; i < display->num_render_drivers; ++i) {
SDL_RenderDriver *driver = &display->render_drivers[i];
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if (driver->info.name == SW_RenderDriver.info.name) {
continue;
}
if (desired_driver
&& SDL_strcasecmp(desired_driver, driver->info.name) != 0) {
continue;
}
data->renderer = driver->CreateRenderer(window, renderer_flags);
if (data->renderer) {
break;
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}
}
if (i == display->num_render_drivers) {
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SW_DestroyRenderer(renderer);
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SDL_SetError("Couldn't find display render driver");
return NULL;
}
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if (data->renderer->info.flags & SDL_RENDERER_PRESENTVSYNC) {
renderer->info.flags |= SDL_RENDERER_PRESENTVSYNC;
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}
/* Create the textures we'll use for display */
for (i = 0; i < n; ++i) {
data->texture[i] =
CreateTexture(data->renderer, data->format, window->w, window->h);
if (!data->texture[i]) {
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SW_DestroyRenderer(renderer);
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return NULL;
}
}
data->current_texture = 0;
/* Create a surface we'll use for rendering */
data->surface.flags = SDL_PREALLOC;
data->surface.format = SDL_AllocFormat(bpp, Rmask, Gmask, Bmask, Amask);
if (!data->surface.format) {
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SW_DestroyRenderer(renderer);
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return NULL;
}
SDL_SetSurfacePalette(&data->surface, display->palette);
/* Set up a palette watch on the display palette */
if (display->palette) {
SDL_AddPaletteWatch(display->palette, DisplayPaletteChanged, data);
}
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return renderer;
}
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static int
SW_ActivateRenderer(SDL_Renderer * renderer)
{
SW_RenderData *data = (SW_RenderData *) renderer->driverdata;
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SDL_Window *window = SDL_GetWindowFromID(renderer->window);
int i, n;
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if (data->renderer && data->renderer->ActivateRenderer) {
if (data->renderer->ActivateRenderer(data->renderer) < 0) {
return -1;
}
}
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if (data->updateSize) {
/* Recreate the textures for the new window size */
if (renderer->info.flags & SDL_RENDERER_PRESENTFLIP2) {
n = 2;
} else if (renderer->info.flags & SDL_RENDERER_PRESENTFLIP3) {
n = 3;
} else {
n = 1;
}
for (i = 0; i < n; ++i) {
if (data->texture[i]) {
DestroyTexture(data->renderer, data->texture[i]);
data->texture[i] = 0;
}
}
for (i = 0; i < n; ++i) {
data->texture[i] =
CreateTexture(data->renderer, data->format, window->w,
window->h);
if (!data->texture[i]) {
return -1;
}
}
data->updateSize = SDL_FALSE;
}
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return 0;
}
static int
SW_DisplayModeChanged(SDL_Renderer * renderer)
{
SW_RenderData *data = (SW_RenderData *) renderer->driverdata;
if (data->renderer && data->renderer->DisplayModeChanged) {
if (data->renderer->DisplayModeChanged(data->renderer) < 0) {
return -1;
}
}
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data->updateSize = SDL_TRUE;
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return 0;
}
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static int
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SW_CreateTexture(SDL_Renderer * renderer, SDL_Texture * texture)
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{
if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {
texture->driverdata = SDL_SW_CreateYUVTexture(texture);
} else {
int bpp;
Uint32 Rmask, Gmask, Bmask, Amask;
if (!SDL_PixelFormatEnumToMasks
(texture->format, &bpp, &Rmask, &Gmask, &Bmask, &Amask)) {
SDL_SetError("Unknown texture format");
return -1;
}
texture->driverdata =
SDL_CreateRGBSurface(0, texture->w, texture->h, bpp, Rmask, Gmask,
Bmask, Amask);
}
if (!texture->driverdata) {
return -1;
}
return 0;
}
static int
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SW_QueryTexturePixels(SDL_Renderer * renderer, SDL_Texture * texture,
void **pixels, int *pitch)
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{
if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {
return SDL_SW_QueryYUVTexturePixels((SDL_SW_YUVTexture *) texture->
driverdata, pixels, pitch);
} else {
SDL_Surface *surface = (SDL_Surface *) texture->driverdata;
*pixels = surface->pixels;
*pitch = surface->pitch;
return 0;
}
}
static int
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SW_SetTexturePalette(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Color * colors, int firstcolor, int ncolors)
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{
if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {
SDL_SetError("YUV textures don't have a palette");
return -1;
} else {
SDL_Surface *surface = (SDL_Surface *) texture->driverdata;
return SDL_SetPaletteColors(surface->format->palette, colors,
firstcolor, ncolors);
}
}
static int
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SW_GetTexturePalette(SDL_Renderer * renderer, SDL_Texture * texture,
SDL_Color * colors, int firstcolor, int ncolors)
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{
if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {
SDL_SetError("YUV textures don't have a palette");
return -1;
} else {
SDL_Surface *surface = (SDL_Surface *) texture->driverdata;
SDL_memcpy(colors, &surface->format->palette->colors[firstcolor],
ncolors * sizeof(*colors));
return 0;
}
}
static int
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SW_UpdateTexture(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * rect, const void *pixels, int pitch)
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{
if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {
return SDL_SW_UpdateYUVTexture((SDL_SW_YUVTexture *) texture->
driverdata, rect, pixels, pitch);
} else {
SDL_Surface *surface = (SDL_Surface *) texture->driverdata;
Uint8 *src, *dst;
int row;
size_t length;
src = (Uint8 *) pixels;
dst =
(Uint8 *) surface->pixels + rect->y * surface->pitch +
rect->x * surface->format->BytesPerPixel;
length = rect->w * surface->format->BytesPerPixel;
for (row = 0; row < rect->h; ++row) {
SDL_memcpy(dst, src, length);
src += pitch;
dst += surface->pitch;
}
return 0;
}
}
static int
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SW_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * rect, int markDirty, void **pixels,
int *pitch)
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{
if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {
return SDL_SW_LockYUVTexture((SDL_SW_YUVTexture *) texture->
driverdata, rect, markDirty, pixels,
pitch);
} else {
SDL_Surface *surface = (SDL_Surface *) texture->driverdata;
*pixels =
(void *) ((Uint8 *) surface->pixels + rect->y * surface->pitch +
rect->x * surface->format->BytesPerPixel);
*pitch = surface->pitch;
return 0;
}
}
static void
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SW_UnlockTexture(SDL_Renderer * renderer, SDL_Texture * texture)
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{
if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {
SDL_SW_UnlockYUVTexture((SDL_SW_YUVTexture *) texture->driverdata);
}
}
static void
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SW_DirtyTexture(SDL_Renderer * renderer, SDL_Texture * texture,
int numrects, const SDL_Rect * rects)
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{
}
static int
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SW_RenderFill(SDL_Renderer * renderer, const SDL_Rect * rect, Uint32 color)
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{
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SW_RenderData *data = (SW_RenderData *) renderer->driverdata;
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Uint8 r, g, b, a;
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SDL_Rect real_rect;
int status;
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if (data->renderer->info.flags & SDL_RENDERER_PRESENTCOPY) {
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SDL_AddDirtyRect(&data->dirty, rect);
}
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a = (Uint8) ((color >> 24) & 0xFF);
r = (Uint8) ((color >> 16) & 0xFF);
g = (Uint8) ((color >> 8) & 0xFF);
b = (Uint8) (color & 0xFF);
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color = SDL_MapRGBA(data->surface.format, r, g, b, a);
if (data->renderer->
LockTexture(data->renderer, data->texture[data->current_texture],
rect, 1, &data->surface.pixels,
&data->surface.pitch) < 0) {
return -1;
}
data->surface.w = rect->w;
data->surface.h = rect->h;
data->surface.clip_rect.w = rect->w;
data->surface.clip_rect.h = rect->h;
real_rect = data->surface.clip_rect;
status = SDL_FillRect(&data->surface, &real_rect, color);
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data->renderer->UnlockTexture(data->renderer,
data->texture[data->current_texture]);
return status;
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}
static int
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SW_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * srcrect, const SDL_Rect * dstrect,
int blendMode, int scaleMode)
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{
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SW_RenderData *data = (SW_RenderData *) renderer->driverdata;
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SDL_Window *window = SDL_GetWindowFromID(renderer->window);
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int status;
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if (data->renderer->info.flags & SDL_RENDERER_PRESENTCOPY) {
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SDL_AddDirtyRect(&data->dirty, dstrect);
}
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if (data->renderer->
LockTexture(data->renderer, data->texture[data->current_texture],
dstrect, 1, &data->surface.pixels,
&data->surface.pitch) < 0) {
return -1;
}
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if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {
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status =
SDL_SW_CopyYUVToRGB((SDL_SW_YUVTexture *) texture->driverdata,
srcrect, data->format, dstrect->w, dstrect->h,
data->surface.pixels, data->surface.pitch);
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} else {
SDL_Surface *surface = (SDL_Surface *) texture->driverdata;
SDL_Rect real_srcrect = *srcrect;
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SDL_Rect real_dstrect;
data->surface.w = dstrect->w;
data->surface.h = dstrect->h;
data->surface.clip_rect.w = dstrect->w;
data->surface.clip_rect.h = dstrect->h;
real_dstrect = data->surface.clip_rect;
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if (blendMode &
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(SDL_TEXTUREBLENDMODE_MASK | SDL_TEXTUREBLENDMODE_BLEND)) {
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SDL_SetAlpha(surface, SDL_SRCALPHA, 0);
} else {
SDL_SetAlpha(surface, 0, 0);
}
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if (scaleMode != SDL_TEXTURESCALEMODE_NONE &&
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(srcrect->w != dstrect->w || srcrect->h != dstrect->h)) {
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status =
SDL_SoftStretch(surface, &real_srcrect, &data->surface,
&real_dstrect);
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} else {
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status =
SDL_LowerBlit(surface, &real_srcrect, &data->surface,
&real_dstrect);
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}
}
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data->renderer->UnlockTexture(data->renderer,
data->texture[data->current_texture]);
return status;
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}
static void
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SW_RenderPresent(SDL_Renderer * renderer)
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{
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SW_RenderData *data = (SW_RenderData *) renderer->driverdata;
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SDL_Texture *texture = data->texture[data->current_texture];
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/* Send the data to the display */
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if (data->renderer->info.flags & SDL_RENDERER_PRESENTCOPY) {
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SDL_DirtyRect *dirty;
for (dirty = data->dirty.list; dirty; dirty = dirty->next) {
data->renderer->RenderCopy(data->renderer, texture, &dirty->rect,
&dirty->rect,
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SDL_TEXTUREBLENDMODE_NONE,
SDL_TEXTURESCALEMODE_NONE);
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}
SDL_ClearDirtyRects(&data->dirty);
} else {
SDL_Rect rect;
rect.x = 0;
rect.y = 0;
rect.w = texture->w;
rect.h = texture->h;
data->renderer->RenderCopy(data->renderer, texture, &rect, &rect,
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SDL_TEXTUREBLENDMODE_NONE,
SDL_TEXTURESCALEMODE_NONE);
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}
data->renderer->RenderPresent(data->renderer);
/* Update the flipping chain, if any */
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if (renderer->info.flags & SDL_RENDERER_PRESENTFLIP2) {
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data->current_texture = (data->current_texture + 1) % 2;
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} else if (renderer->info.flags & SDL_RENDERER_PRESENTFLIP3) {
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data->current_texture = (data->current_texture + 1) % 3;
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}
}
static void
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SW_DestroyTexture(SDL_Renderer * renderer, SDL_Texture * texture)
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{
if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {
SDL_SW_DestroyYUVTexture((SDL_SW_YUVTexture *) texture->driverdata);
} else {
SDL_Surface *surface = (SDL_Surface *) texture->driverdata;
SDL_FreeSurface(surface);
}
}
static void
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SW_DestroyRenderer(SDL_Renderer * renderer)
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{
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SW_RenderData *data = (SW_RenderData *) renderer->driverdata;
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SDL_Window *window = SDL_GetWindowFromID(renderer->window);
SDL_VideoDisplay *display = SDL_GetDisplayFromWindow(window);
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int i;
if (data) {
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for (i = 0; i < SDL_arraysize(data->texture); ++i) {
if (data->texture[i]) {
DestroyTexture(data->renderer, data->texture[i]);
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}
}
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if (data->surface.format) {
SDL_SetSurfacePalette(&data->surface, NULL);
SDL_FreeFormat(data->surface.format);
}
if (display->palette) {
SDL_DelPaletteWatch(display->palette, DisplayPaletteChanged,
data);
}
if (data->renderer) {
data->renderer->DestroyRenderer(data->renderer);
}
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SDL_FreeDirtyRects(&data->dirty);
SDL_free(data);
}
SDL_free(renderer);
}
/* vi: set ts=4 sw=4 expandtab: */