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SDL-mirror/src/render/SDL_render.c
Sam Lantinga 6e05dee645 a Nintendo ds update 
Frank Zago to SDL

For those interested, here's a snapshot of the current port. I did away with
most of the previous attempt which was based of the sprite engine, because the
support is limited to 128 64x64 sprites. Instead I'm using the gl engine.
The drawback is that either the frame buffer or the gl engine can be used
because there's not that much video memory on a DS.

With minimal changes to their code, it can now run the following tests: ,
testspriteminimal, testscale and testsprite2. The last 2 only run under the
emulator for some reason. The tests are not included in this patch for size
reason.

In 16 bits mode, the 16th bit indicated transparency/opacity. If 0, the color
is not displayed. So I had to patch a few core file to set that bit to 1. See
patch for src/video/SDL_RLEaccel.c and src/video/SDL_blit.h. Is that ok, or is
there a better way ?

The nds also doesn't support windowed mode, so I force the fullscreen in
src/video/SDL_video.c.  Is that ok, or is there a better way ?

To get a smaller library, I also tried to not compile the software renderer
when the hardware renderer is compiled in, and define SDL_NO_COMPAT; however
the compilation eventually fails in SDL_surface.c because SDL_SRCCOLORKEY is
defined in SDL_compat.h. Is SDL_NO_COMPAT only for application and not SDL
itself ?
2011-03-06 21:12:19 -08:00

1159 lines
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/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997-2011 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"
/* The SDL 2D rendering system */
#include "SDL_hints.h"
#include "SDL_log.h"
#include "SDL_render.h"
#include "SDL_sysrender.h"
#include "software/SDL_render_sw_c.h"
#define CHECK_RENDERER_MAGIC(renderer, retval) \
if (!renderer || renderer->magic != &renderer_magic) { \
SDL_SetError("Invalid renderer"); \
return retval; \
}
#define CHECK_TEXTURE_MAGIC(texture, retval) \
if (!texture || texture->magic != &texture_magic) { \
SDL_SetError("Invalid texture"); \
return retval; \
}
static const SDL_RenderDriver *render_drivers[] = {
#if !SDL_RENDER_DISABLED
#if SDL_VIDEO_RENDER_D3D
&D3D_RenderDriver,
#endif
#if SDL_VIDEO_RENDER_OGL
&GL_RenderDriver,
#endif
#if SDL_VIDEO_RENDER_OGL_ES2
&GLES2_RenderDriver,
#endif
#if SDL_VIDEO_RENDER_OGL_ES
&GLES_RenderDriver,
#endif
#if SDL_VIDEO_RENDER_DIRECTFB
&DirectFB_RenderDriver,
#endif
#if SDL_VIDEO_RENDER_NDS
&NDS_RenderDriver,
#endif
&SW_RenderDriver
#endif /* !SDL_RENDER_DISABLED */
};
static char renderer_magic;
static char texture_magic;
int
SDL_GetNumRenderDrivers(void)
{
return SDL_arraysize(render_drivers);
}
int
SDL_GetRenderDriverInfo(int index, SDL_RendererInfo * info)
{
if (index < 0 || index >= SDL_GetNumRenderDrivers()) {
SDL_SetError("index must be in the range of 0 - %d",
SDL_GetNumRenderDrivers() - 1);
return -1;
}
*info = render_drivers[index]->info;
return 0;
}
static int
SDL_RendererEventWatch(void *userdata, SDL_Event *event)
{
SDL_Renderer *renderer = (SDL_Renderer *)userdata;
if (event->type == SDL_WINDOWEVENT) {
SDL_Window *window = SDL_GetWindowFromID(event->window.windowID);
if (window == renderer->window) {
if (renderer->WindowEvent) {
renderer->WindowEvent(renderer, &event->window);
}
if (event->window.event == SDL_WINDOWEVENT_SIZE_CHANGED) {
/* Try to keep the previous viewport centered */
int w, h;
SDL_Rect viewport;
SDL_GetWindowSize(window, &w, &h);
viewport.x = (w - renderer->viewport.w) / 2;
viewport.y = (h - renderer->viewport.h) / 2;
viewport.w = renderer->viewport.w;
viewport.h = renderer->viewport.h;
SDL_RenderSetViewport(renderer, &viewport);
}
}
}
return 0;
}
SDL_Renderer *
SDL_CreateRenderer(SDL_Window * window, int index, Uint32 flags)
{
SDL_Renderer *renderer = NULL;
int n = SDL_GetNumRenderDrivers();
const char *hint;
hint = SDL_GetHint(SDL_HINT_RENDER_VSYNC);
if (hint) {
if (*hint == '0') {
flags &= ~SDL_RENDERER_PRESENTVSYNC;
} else {
flags |= SDL_RENDERER_PRESENTVSYNC;
}
}
if (index < 0) {
hint = SDL_GetHint(SDL_HINT_RENDER_DRIVER);
if (hint) {
for (index = 0; index < n; ++index) {
const SDL_RenderDriver *driver = render_drivers[index];
if (SDL_strcasecmp(hint, driver->info.name) == 0) {
/* Create a new renderer instance */
renderer = driver->CreateRenderer(window, flags);
break;
}
}
}
if (!renderer) {
for (index = 0; index < n; ++index) {
const SDL_RenderDriver *driver = render_drivers[index];
if ((driver->info.flags & flags) == flags) {
/* Create a new renderer instance */
renderer = driver->CreateRenderer(window, flags);
if (renderer) {
/* Yay, we got one! */
break;
}
}
}
}
if (index == n) {
SDL_SetError("Couldn't find matching render driver");
return NULL;
}
} else {
if (index >= SDL_GetNumRenderDrivers()) {
SDL_SetError("index must be -1 or in the range of 0 - %d",
SDL_GetNumRenderDrivers() - 1);
return NULL;
}
/* Create a new renderer instance */
renderer = render_drivers[index]->CreateRenderer(window, flags);
}
if (renderer) {
renderer->magic = &renderer_magic;
renderer->window = window;
SDL_RenderSetViewport(renderer, NULL);
SDL_AddEventWatch(SDL_RendererEventWatch, renderer);
SDL_LogInfo(SDL_LOG_CATEGORY_RENDER,
"Created renderer: %s", renderer->info.name);
}
return renderer;
}
SDL_Renderer *
SDL_CreateSoftwareRenderer(SDL_Surface * surface)
{
#if !SDL_RENDER_DISABLED
SDL_Renderer *renderer;
renderer = SW_CreateRendererForSurface(surface);
if (renderer) {
renderer->magic = &renderer_magic;
SDL_RenderSetViewport(renderer, NULL);
}
return renderer;
#else
SDL_SetError("SDL not built with rendering support");
return NULL;
#endif /* !SDL_RENDER_DISABLED */
}
int
SDL_GetRendererInfo(SDL_Renderer * renderer, SDL_RendererInfo * info)
{
CHECK_RENDERER_MAGIC(renderer, -1);
*info = renderer->info;
return 0;
}
static SDL_bool
IsSupportedFormat(SDL_Renderer * renderer, Uint32 format)
{
Uint32 i;
for (i = 0; i < renderer->info.num_texture_formats; ++i) {
if (renderer->info.texture_formats[i] == format) {
return SDL_TRUE;
}
}
return SDL_FALSE;
}
static Uint32
GetClosestSupportedFormat(SDL_Renderer * renderer, Uint32 format)
{
Uint32 i;
if (SDL_ISPIXELFORMAT_FOURCC(format)) {
/* Look for an exact match */
for (i = 0; i < renderer->info.num_texture_formats; ++i) {
if (renderer->info.texture_formats[i] == format) {
return renderer->info.texture_formats[i];
}
}
} else {
SDL_bool hasAlpha = SDL_ISPIXELFORMAT_ALPHA(format);
/* We just want to match the first format that has the same channels */
for (i = 0; i < renderer->info.num_texture_formats; ++i) {
if (!SDL_ISPIXELFORMAT_FOURCC(renderer->info.texture_formats[i]) &&
SDL_ISPIXELFORMAT_ALPHA(renderer->info.texture_formats[i]) == hasAlpha) {
return renderer->info.texture_formats[i];
}
}
}
return renderer->info.texture_formats[0];
}
SDL_Texture *
SDL_CreateTexture(SDL_Renderer * renderer, Uint32 format, int access, int w, int h)
{
SDL_Texture *texture;
CHECK_RENDERER_MAGIC(renderer, NULL);
if (!format) {
format = renderer->info.texture_formats[0];
}
if (SDL_ISPIXELFORMAT_INDEXED(format)) {
SDL_SetError("Palettized textures are not supported");
return NULL;
}
if (w <= 0 || h <= 0) {
SDL_SetError("Texture dimensions can't be 0");
return NULL;
}
texture = (SDL_Texture *) SDL_calloc(1, sizeof(*texture));
if (!texture) {
SDL_OutOfMemory();
return NULL;
}
texture->magic = &texture_magic;
texture->format = format;
texture->access = access;
texture->w = w;
texture->h = h;
texture->r = 255;
texture->g = 255;
texture->b = 255;
texture->a = 255;
texture->renderer = renderer;
texture->next = renderer->textures;
if (renderer->textures) {
renderer->textures->prev = texture;
}
renderer->textures = texture;
if (IsSupportedFormat(renderer, format)) {
if (renderer->CreateTexture(renderer, texture) < 0) {
SDL_DestroyTexture(texture);
return 0;
}
} else {
texture->native = SDL_CreateTexture(renderer,
GetClosestSupportedFormat(renderer, format),
access, w, h);
if (!texture->native) {
SDL_DestroyTexture(texture);
return NULL;
}
if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {
texture->yuv = SDL_SW_CreateYUVTexture(format, w, h);
if (!texture->yuv) {
SDL_DestroyTexture(texture);
return NULL;
}
} else if (access == SDL_TEXTUREACCESS_STREAMING) {
/* The pitch is 4 byte aligned */
texture->pitch = (((w * SDL_BYTESPERPIXEL(format)) + 3) & ~3);
texture->pixels = SDL_calloc(1, texture->pitch * h);
if (!texture->pixels) {
SDL_DestroyTexture(texture);
return NULL;
}
}
}
return texture;
}
SDL_Texture *
SDL_CreateTextureFromSurface(SDL_Renderer * renderer, SDL_Surface * surface)
{
const SDL_PixelFormat *fmt;
SDL_bool needAlpha;
Uint32 i;
Uint32 format;
SDL_Texture *texture;
CHECK_RENDERER_MAGIC(renderer, NULL);
if (!surface) {
SDL_SetError("SDL_CreateTextureFromSurface() passed NULL surface");
return NULL;
}
/* See what the best texture format is */
fmt = surface->format;
if (fmt->Amask || SDL_GetColorKey(surface, NULL) == 0) {
needAlpha = SDL_TRUE;
} else {
needAlpha = SDL_FALSE;
}
format = renderer->info.texture_formats[0];
for (i = 0; i < renderer->info.num_texture_formats; ++i) {
if (!SDL_ISPIXELFORMAT_FOURCC(renderer->info.texture_formats[i]) &&
SDL_ISPIXELFORMAT_ALPHA(renderer->info.texture_formats[i]) == needAlpha) {
format = renderer->info.texture_formats[i];
break;
}
}
texture = SDL_CreateTexture(renderer, format, SDL_TEXTUREACCESS_STATIC,
surface->w, surface->h);
if (!texture) {
return NULL;
}
if (format == surface->format->format) {
if (SDL_MUSTLOCK(surface)) {
SDL_LockSurface(surface);
SDL_UpdateTexture(texture, NULL, surface->pixels, surface->pitch);
SDL_UnlockSurface(surface);
} else {
SDL_UpdateTexture(texture, NULL, surface->pixels, surface->pitch);
}
} else {
SDL_PixelFormat *dst_fmt;
SDL_Surface *temp = NULL;
/* Set up a destination surface for the texture update */
dst_fmt = SDL_AllocFormat(format);
temp = SDL_ConvertSurface(surface, dst_fmt, 0);
SDL_FreeFormat(dst_fmt);
if (temp) {
SDL_UpdateTexture(texture, NULL, temp->pixels, temp->pitch);
SDL_FreeSurface(temp);
} else {
SDL_DestroyTexture(texture);
return NULL;
}
}
{
Uint8 r, g, b, a;
SDL_BlendMode blendMode;
SDL_GetSurfaceColorMod(surface, &r, &g, &b);
SDL_SetTextureColorMod(texture, r, g, b);
SDL_GetSurfaceAlphaMod(surface, &a);
SDL_SetTextureAlphaMod(texture, a);
if (SDL_GetColorKey(surface, NULL) == 0) {
/* We converted to a texture with alpha format */
SDL_SetTextureBlendMode(texture, SDL_BLENDMODE_BLEND);
} else {
SDL_GetSurfaceBlendMode(surface, &blendMode);
SDL_SetTextureBlendMode(texture, blendMode);
}
}
return texture;
}
int
SDL_QueryTexture(SDL_Texture * texture, Uint32 * format, int *access,
int *w, int *h)
{
CHECK_TEXTURE_MAGIC(texture, -1);
if (format) {
*format = texture->format;
}
if (access) {
*access = texture->access;
}
if (w) {
*w = texture->w;
}
if (h) {
*h = texture->h;
}
return 0;
}
int
SDL_SetTextureColorMod(SDL_Texture * texture, Uint8 r, Uint8 g, Uint8 b)
{
SDL_Renderer *renderer;
CHECK_TEXTURE_MAGIC(texture, -1);
renderer = texture->renderer;
if (r < 255 || g < 255 || b < 255) {
texture->modMode |= SDL_TEXTUREMODULATE_COLOR;
} else {
texture->modMode &= ~SDL_TEXTUREMODULATE_COLOR;
}
texture->r = r;
texture->g = g;
texture->b = b;
if (texture->native) {
return SDL_SetTextureColorMod(texture->native, r, g, b);
} else if (renderer->SetTextureColorMod) {
return renderer->SetTextureColorMod(renderer, texture);
} else {
return 0;
}
}
int
SDL_GetTextureColorMod(SDL_Texture * texture, Uint8 * r, Uint8 * g,
Uint8 * b)
{
SDL_Renderer *renderer;
CHECK_TEXTURE_MAGIC(texture, -1);
renderer = texture->renderer;
if (r) {
*r = texture->r;
}
if (g) {
*g = texture->g;
}
if (b) {
*b = texture->b;
}
return 0;
}
int
SDL_SetTextureAlphaMod(SDL_Texture * texture, Uint8 alpha)
{
SDL_Renderer *renderer;
CHECK_TEXTURE_MAGIC(texture, -1);
renderer = texture->renderer;
if (alpha < 255) {
texture->modMode |= SDL_TEXTUREMODULATE_ALPHA;
} else {
texture->modMode &= ~SDL_TEXTUREMODULATE_ALPHA;
}
texture->a = alpha;
if (texture->native) {
return SDL_SetTextureAlphaMod(texture->native, alpha);
} else if (renderer->SetTextureAlphaMod) {
return renderer->SetTextureAlphaMod(renderer, texture);
} else {
return 0;
}
}
int
SDL_GetTextureAlphaMod(SDL_Texture * texture, Uint8 * alpha)
{
CHECK_TEXTURE_MAGIC(texture, -1);
if (alpha) {
*alpha = texture->a;
}
return 0;
}
int
SDL_SetTextureBlendMode(SDL_Texture * texture, SDL_BlendMode blendMode)
{
SDL_Renderer *renderer;
CHECK_TEXTURE_MAGIC(texture, -1);
renderer = texture->renderer;
texture->blendMode = blendMode;
if (texture->native) {
return SDL_SetTextureBlendMode(texture->native, blendMode);
} else if (renderer->SetTextureBlendMode) {
return renderer->SetTextureBlendMode(renderer, texture);
} else {
return 0;
}
}
int
SDL_GetTextureBlendMode(SDL_Texture * texture, SDL_BlendMode *blendMode)
{
CHECK_TEXTURE_MAGIC(texture, -1);
if (blendMode) {
*blendMode = texture->blendMode;
}
return 0;
}
static int
SDL_UpdateTextureYUV(SDL_Texture * texture, const SDL_Rect * rect,
const void *pixels, int pitch)
{
SDL_Texture *native = texture->native;
SDL_Rect full_rect;
if (SDL_SW_UpdateYUVTexture(texture->yuv, rect, pixels, pitch) < 0) {
return -1;
}
full_rect.x = 0;
full_rect.y = 0;
full_rect.w = texture->w;
full_rect.h = texture->h;
rect = &full_rect;
if (texture->access == SDL_TEXTUREACCESS_STREAMING) {
/* We can lock the texture and copy to it */
void *native_pixels;
int native_pitch;
if (SDL_LockTexture(native, rect, &native_pixels, &native_pitch) < 0) {
return -1;
}
SDL_SW_CopyYUVToRGB(texture->yuv, rect, native->format,
rect->w, rect->h, native_pixels, native_pitch);
SDL_UnlockTexture(native);
} else {
/* Use a temporary buffer for updating */
void *temp_pixels;
int temp_pitch;
temp_pitch = (((rect->w * SDL_BYTESPERPIXEL(native->format)) + 3) & ~3);
temp_pixels = SDL_malloc(rect->h * temp_pitch);
if (!temp_pixels) {
SDL_OutOfMemory();
return -1;
}
SDL_SW_CopyYUVToRGB(texture->yuv, rect, native->format,
rect->w, rect->h, temp_pixels, temp_pitch);
SDL_UpdateTexture(native, rect, temp_pixels, temp_pitch);
SDL_free(temp_pixels);
}
return 0;
}
static int
SDL_UpdateTextureNative(SDL_Texture * texture, const SDL_Rect * rect,
const void *pixels, int pitch)
{
SDL_Texture *native = texture->native;
if (texture->access == SDL_TEXTUREACCESS_STREAMING) {
/* We can lock the texture and copy to it */
void *native_pixels;
int native_pitch;
if (SDL_LockTexture(native, rect, &native_pixels, &native_pitch) < 0) {
return -1;
}
SDL_ConvertPixels(rect->w, rect->h,
texture->format, pixels, pitch,
native->format, native_pixels, native_pitch);
SDL_UnlockTexture(native);
} else {
/* Use a temporary buffer for updating */
void *temp_pixels;
int temp_pitch;
temp_pitch = (((rect->w * SDL_BYTESPERPIXEL(native->format)) + 3) & ~3);
temp_pixels = SDL_malloc(rect->h * temp_pitch);
if (!temp_pixels) {
SDL_OutOfMemory();
return -1;
}
SDL_ConvertPixels(rect->w, rect->h,
texture->format, pixels, pitch,
native->format, temp_pixels, temp_pitch);
SDL_UpdateTexture(native, rect, temp_pixels, temp_pitch);
SDL_free(temp_pixels);
}
return 0;
}
int
SDL_UpdateTexture(SDL_Texture * texture, const SDL_Rect * rect,
const void *pixels, int pitch)
{
SDL_Renderer *renderer;
SDL_Rect full_rect;
CHECK_TEXTURE_MAGIC(texture, -1);
if (!rect) {
full_rect.x = 0;
full_rect.y = 0;
full_rect.w = texture->w;
full_rect.h = texture->h;
rect = &full_rect;
}
if (texture->yuv) {
return SDL_UpdateTextureYUV(texture, rect, pixels, pitch);
} else if (texture->native) {
return SDL_UpdateTextureNative(texture, rect, pixels, pitch);
} else {
renderer = texture->renderer;
return renderer->UpdateTexture(renderer, texture, rect, pixels, pitch);
}
}
static int
SDL_LockTextureYUV(SDL_Texture * texture, const SDL_Rect * rect,
void **pixels, int *pitch)
{
return SDL_SW_LockYUVTexture(texture->yuv, rect, pixels, pitch);
}
static int
SDL_LockTextureNative(SDL_Texture * texture, const SDL_Rect * rect,
void **pixels, int *pitch)
{
texture->locked_rect = *rect;
*pixels = (void *) ((Uint8 *) texture->pixels +
rect->y * texture->pitch +
rect->x * SDL_BYTESPERPIXEL(texture->format));
*pitch = texture->pitch;
return 0;
}
int
SDL_LockTexture(SDL_Texture * texture, const SDL_Rect * rect,
void **pixels, int *pitch)
{
SDL_Renderer *renderer;
SDL_Rect full_rect;
CHECK_TEXTURE_MAGIC(texture, -1);
if (texture->access != SDL_TEXTUREACCESS_STREAMING) {
SDL_SetError("SDL_LockTexture(): texture must be streaming");
return -1;
}
if (!rect) {
full_rect.x = 0;
full_rect.y = 0;
full_rect.w = texture->w;
full_rect.h = texture->h;
rect = &full_rect;
}
if (texture->yuv) {
return SDL_LockTextureYUV(texture, rect, pixels, pitch);
} else if (texture->native) {
return SDL_LockTextureNative(texture, rect, pixels, pitch);
} else {
renderer = texture->renderer;
return renderer->LockTexture(renderer, texture, rect, pixels, pitch);
}
}
static void
SDL_UnlockTextureYUV(SDL_Texture * texture)
{
SDL_Texture *native = texture->native;
void *native_pixels;
int native_pitch;
SDL_Rect rect;
rect.x = 0;
rect.y = 0;
rect.w = texture->w;
rect.h = texture->h;
if (SDL_LockTexture(native, &rect, &native_pixels, &native_pitch) < 0) {
return;
}
SDL_SW_CopyYUVToRGB(texture->yuv, &rect, native->format,
rect.w, rect.h, native_pixels, native_pitch);
SDL_UnlockTexture(native);
}
void
SDL_UnlockTextureNative(SDL_Texture * texture)
{
SDL_Texture *native = texture->native;
void *native_pixels;
int native_pitch;
const SDL_Rect *rect = &texture->locked_rect;
const void* pixels = (void *) ((Uint8 *) texture->pixels +
rect->y * texture->pitch +
rect->x * SDL_BYTESPERPIXEL(texture->format));
int pitch = texture->pitch;
if (SDL_LockTexture(native, rect, &native_pixels, &native_pitch) < 0) {
return;
}
SDL_ConvertPixels(rect->w, rect->h,
texture->format, pixels, pitch,
native->format, native_pixels, native_pitch);
SDL_UnlockTexture(native);
}
void
SDL_UnlockTexture(SDL_Texture * texture)
{
SDL_Renderer *renderer;
CHECK_TEXTURE_MAGIC(texture, );
if (texture->access != SDL_TEXTUREACCESS_STREAMING) {
return;
}
if (texture->yuv) {
SDL_UnlockTextureYUV(texture);
} else if (texture->native) {
SDL_UnlockTextureNative(texture);
} else {
renderer = texture->renderer;
renderer->UnlockTexture(renderer, texture);
}
}
int
SDL_RenderSetViewport(SDL_Renderer * renderer, const SDL_Rect * rect)
{
CHECK_RENDERER_MAGIC(renderer, -1);
if (rect) {
renderer->viewport = *rect;
} else {
renderer->viewport.x = 0;
renderer->viewport.y = 0;
if (renderer->window) {
SDL_GetWindowSize(renderer->window,
&renderer->viewport.w, &renderer->viewport.h);
} else {
/* This will be filled in by UpdateViewport() */
renderer->viewport.w = 0;
renderer->viewport.h = 0;
}
}
return renderer->UpdateViewport(renderer);
}
void
SDL_RenderGetViewport(SDL_Renderer * renderer, SDL_Rect * rect)
{
CHECK_RENDERER_MAGIC(renderer, );
*rect = renderer->viewport;
}
int
SDL_SetRenderDrawColor(SDL_Renderer * renderer,
Uint8 r, Uint8 g, Uint8 b, Uint8 a)
{
CHECK_RENDERER_MAGIC(renderer, -1);
renderer->r = r;
renderer->g = g;
renderer->b = b;
renderer->a = a;
return 0;
}
int
SDL_GetRenderDrawColor(SDL_Renderer * renderer,
Uint8 * r, Uint8 * g, Uint8 * b, Uint8 * a)
{
CHECK_RENDERER_MAGIC(renderer, -1);
if (r) {
*r = renderer->r;
}
if (g) {
*g = renderer->g;
}
if (b) {
*b = renderer->b;
}
if (a) {
*a = renderer->a;
}
return 0;
}
int
SDL_SetRenderDrawBlendMode(SDL_Renderer * renderer, SDL_BlendMode blendMode)
{
CHECK_RENDERER_MAGIC(renderer, -1);
renderer->blendMode = blendMode;
return 0;
}
int
SDL_GetRenderDrawBlendMode(SDL_Renderer * renderer, SDL_BlendMode *blendMode)
{
CHECK_RENDERER_MAGIC(renderer, -1);
*blendMode = renderer->blendMode;
return 0;
}
int
SDL_RenderClear(SDL_Renderer * renderer)
{
CHECK_RENDERER_MAGIC(renderer, -1);
return renderer->RenderClear(renderer);
}
int
SDL_RenderDrawPoint(SDL_Renderer * renderer, int x, int y)
{
SDL_Point point;
point.x = x;
point.y = y;
return SDL_RenderDrawPoints(renderer, &point, 1);
}
int
SDL_RenderDrawPoints(SDL_Renderer * renderer,
const SDL_Point * points, int count)
{
CHECK_RENDERER_MAGIC(renderer, -1);
if (!points) {
SDL_SetError("SDL_RenderDrawPoints(): Passed NULL points");
return -1;
}
if (count < 1) {
return 0;
}
return renderer->RenderDrawPoints(renderer, points, count);
}
int
SDL_RenderDrawLine(SDL_Renderer * renderer, int x1, int y1, int x2, int y2)
{
SDL_Point points[2];
points[0].x = x1;
points[0].y = y1;
points[1].x = x2;
points[1].y = y2;
return SDL_RenderDrawLines(renderer, points, 2);
}
int
SDL_RenderDrawLines(SDL_Renderer * renderer,
const SDL_Point * points, int count)
{
CHECK_RENDERER_MAGIC(renderer, -1);
if (!points) {
SDL_SetError("SDL_RenderDrawLines(): Passed NULL points");
return -1;
}
if (count < 2) {
return 0;
}
return renderer->RenderDrawLines(renderer, points, count);
}
int
SDL_RenderDrawRect(SDL_Renderer * renderer, const SDL_Rect * rect)
{
SDL_Rect full_rect;
SDL_Point points[5];
CHECK_RENDERER_MAGIC(renderer, -1);
/* If 'rect' == NULL, then outline the whole surface */
if (!rect) {
full_rect.x = 0;
full_rect.y = 0;
full_rect.w = renderer->viewport.w;
full_rect.h = renderer->viewport.h;
rect = &full_rect;
}
points[0].x = rect->x;
points[0].y = rect->y;
points[1].x = rect->x+rect->w-1;
points[1].y = rect->y;
points[2].x = rect->x+rect->w-1;
points[2].y = rect->y+rect->h-1;
points[3].x = rect->x;
points[3].y = rect->y+rect->h-1;
points[4].x = rect->x;
points[4].y = rect->y;
return SDL_RenderDrawLines(renderer, points, 5);
}
int
SDL_RenderDrawRects(SDL_Renderer * renderer,
const SDL_Rect * rects, int count)
{
int i;
CHECK_RENDERER_MAGIC(renderer, -1);
if (!rects) {
SDL_SetError("SDL_RenderDrawRects(): Passed NULL rects");
return -1;
}
if (count < 1) {
return 0;
}
for (i = 0; i < count; ++i) {
if (SDL_RenderDrawRect(renderer, &rects[i]) < 0) {
return -1;
}
}
return 0;
}
int
SDL_RenderFillRect(SDL_Renderer * renderer, const SDL_Rect * rect)
{
SDL_Rect full_rect;
CHECK_RENDERER_MAGIC(renderer, -1);
/* If 'rect' == NULL, then outline the whole surface */
if (!rect) {
full_rect.x = 0;
full_rect.y = 0;
full_rect.w = renderer->viewport.w;
full_rect.h = renderer->viewport.h;
rect = &full_rect;
}
return SDL_RenderFillRects(renderer, rect, 1);
}
int
SDL_RenderFillRects(SDL_Renderer * renderer,
const SDL_Rect * rects, int count)
{
CHECK_RENDERER_MAGIC(renderer, -1);
if (!rects) {
SDL_SetError("SDL_RenderFillRects(): Passed NULL rects");
return -1;
}
if (count < 1) {
return 0;
}
return renderer->RenderFillRects(renderer, rects, count);
}
int
SDL_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * srcrect, const SDL_Rect * dstrect)
{
SDL_Window *window;
SDL_Rect real_srcrect;
SDL_Rect real_dstrect;
CHECK_RENDERER_MAGIC(renderer, -1);
CHECK_TEXTURE_MAGIC(texture, -1);
if (renderer != texture->renderer) {
SDL_SetError("Texture was not created with this renderer");
return -1;
}
window = renderer->window;
real_srcrect.x = 0;
real_srcrect.y = 0;
real_srcrect.w = texture->w;
real_srcrect.h = texture->h;
if (srcrect) {
if (!SDL_IntersectRect(srcrect, &real_srcrect, &real_srcrect)) {
return 0;
}
}
real_dstrect.x = 0;
real_dstrect.y = 0;
real_dstrect.w = renderer->viewport.w;
real_dstrect.h = renderer->viewport.h;
if (dstrect) {
if (!SDL_IntersectRect(dstrect, &real_dstrect, &real_dstrect)) {
return 0;
}
/* Clip srcrect by the same amount as dstrect was clipped */
if (dstrect->w != real_dstrect.w) {
int deltax = (real_dstrect.x - dstrect->x);
int deltaw = (real_dstrect.w - dstrect->w);
real_srcrect.x += (deltax * real_srcrect.w) / dstrect->w;
real_srcrect.w += (deltaw * real_srcrect.w) / dstrect->w;
}
if (dstrect->h != real_dstrect.h) {
int deltay = (real_dstrect.y - dstrect->y);
int deltah = (real_dstrect.h - dstrect->h);
real_srcrect.y += (deltay * real_srcrect.h) / dstrect->h;
real_srcrect.h += (deltah * real_srcrect.h) / dstrect->h;
}
}
if (texture->native) {
texture = texture->native;
}
return renderer->RenderCopy(renderer, texture, &real_srcrect,
&real_dstrect);
}
int
SDL_RenderReadPixels(SDL_Renderer * renderer, const SDL_Rect * rect,
Uint32 format, void * pixels, int pitch)
{
SDL_Window *window;
SDL_Rect real_rect;
CHECK_RENDERER_MAGIC(renderer, -1);
if (!renderer->RenderReadPixels) {
SDL_Unsupported();
return -1;
}
window = renderer->window;
if (!format) {
format = SDL_GetWindowPixelFormat(window);
}
real_rect.x = 0;
real_rect.y = 0;
real_rect.w = renderer->viewport.w;
real_rect.h = renderer->viewport.h;
if (rect) {
if (!SDL_IntersectRect(rect, &real_rect, &real_rect)) {
return 0;
}
if (real_rect.y > rect->y) {
pixels = (Uint8 *)pixels + pitch * (real_rect.y - rect->y);
}
if (real_rect.x > rect->x) {
int bpp = SDL_BYTESPERPIXEL(SDL_GetWindowPixelFormat(window));
pixels = (Uint8 *)pixels + bpp * (real_rect.x - rect->x);
}
}
return renderer->RenderReadPixels(renderer, &real_rect,
format, pixels, pitch);
}
void
SDL_RenderPresent(SDL_Renderer * renderer)
{
CHECK_RENDERER_MAGIC(renderer, );
renderer->RenderPresent(renderer);
}
void
SDL_DestroyTexture(SDL_Texture * texture)
{
SDL_Renderer *renderer;
CHECK_TEXTURE_MAGIC(texture, );
texture->magic = NULL;
renderer = texture->renderer;
if (texture->next) {
texture->next->prev = texture->prev;
}
if (texture->prev) {
texture->prev->next = texture->next;
} else {
renderer->textures = texture->next;
}
if (texture->native) {
SDL_DestroyTexture(texture->native);
}
if (texture->yuv) {
SDL_SW_DestroyYUVTexture(texture->yuv);
}
if (texture->pixels) {
SDL_free(texture->pixels);
}
renderer->DestroyTexture(renderer, texture);
SDL_free(texture);
}
void
SDL_DestroyRenderer(SDL_Renderer * renderer)
{
CHECK_RENDERER_MAGIC(renderer, );
SDL_DelEventWatch(SDL_RendererEventWatch, renderer);
/* Free existing textures for this renderer */
while (renderer->textures) {
SDL_DestroyTexture(renderer->textures);
}
/* It's no longer magical... */
renderer->magic = NULL;
/* Free the renderer instance */
renderer->DestroyRenderer(renderer);
}
/* vi: set ts=4 sw=4 expandtab: */
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