diff options
Diffstat (limited to 'Source/3rdParty/SDL2/src/render/software/SDL_render_sw.c')
| -rw-r--r-- | Source/3rdParty/SDL2/src/render/software/SDL_render_sw.c | 887 |
1 files changed, 0 insertions, 887 deletions
diff --git a/Source/3rdParty/SDL2/src/render/software/SDL_render_sw.c b/Source/3rdParty/SDL2/src/render/software/SDL_render_sw.c deleted file mode 100644 index 709dfe8..0000000 --- a/Source/3rdParty/SDL2/src/render/software/SDL_render_sw.c +++ /dev/null @@ -1,887 +0,0 @@ -/* - Simple DirectMedia Layer - Copyright (C) 1997-2018 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_sysrender.h" -#include "SDL_render_sw_c.h" -#include "SDL_hints.h" - -#include "SDL_draw.h" -#include "SDL_blendfillrect.h" -#include "SDL_blendline.h" -#include "SDL_blendpoint.h" -#include "SDL_drawline.h" -#include "SDL_drawpoint.h" -#include "SDL_rotate.h" - -/* SDL surface based renderer implementation */ - -static SDL_Renderer *SW_CreateRenderer(SDL_Window * window, Uint32 flags); -static void SW_WindowEvent(SDL_Renderer * renderer, - const SDL_WindowEvent *event); -static int SW_GetOutputSize(SDL_Renderer * renderer, int *w, int *h); -static int SW_CreateTexture(SDL_Renderer * renderer, SDL_Texture * texture); -static int SW_SetTextureColorMod(SDL_Renderer * renderer, - SDL_Texture * texture); -static int SW_SetTextureAlphaMod(SDL_Renderer * renderer, - SDL_Texture * texture); -static int SW_SetTextureBlendMode(SDL_Renderer * renderer, - SDL_Texture * texture); -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, void **pixels, int *pitch); -static void SW_UnlockTexture(SDL_Renderer * renderer, SDL_Texture * texture); -static int SW_SetRenderTarget(SDL_Renderer * renderer, SDL_Texture * texture); -static int SW_UpdateViewport(SDL_Renderer * renderer); -static int SW_UpdateClipRect(SDL_Renderer * renderer); -static int SW_RenderClear(SDL_Renderer * renderer); -static int SW_RenderDrawPoints(SDL_Renderer * renderer, - const SDL_FPoint * points, int count); -static int SW_RenderDrawLines(SDL_Renderer * renderer, - const SDL_FPoint * points, int count); -static int SW_RenderFillRects(SDL_Renderer * renderer, - const SDL_FRect * rects, int count); -static int SW_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture, - const SDL_Rect * srcrect, const SDL_FRect * dstrect); -static int SW_RenderCopyEx(SDL_Renderer * renderer, SDL_Texture * texture, - const SDL_Rect * srcrect, const SDL_FRect * dstrect, - const double angle, const SDL_FPoint * center, const SDL_RendererFlip flip); -static int SW_RenderReadPixels(SDL_Renderer * renderer, const SDL_Rect * rect, - Uint32 format, void * pixels, int pitch); -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, - { - "software", - SDL_RENDERER_SOFTWARE | SDL_RENDERER_TARGETTEXTURE, - 8, - { - SDL_PIXELFORMAT_ARGB8888, - SDL_PIXELFORMAT_ABGR8888, - SDL_PIXELFORMAT_RGBA8888, - SDL_PIXELFORMAT_BGRA8888, - SDL_PIXELFORMAT_RGB888, - SDL_PIXELFORMAT_BGR888, - SDL_PIXELFORMAT_RGB565, - SDL_PIXELFORMAT_RGB555 - }, - 0, - 0} -}; - -typedef struct -{ - SDL_Surface *surface; - SDL_Surface *window; -} SW_RenderData; - - -static SDL_Surface * -SW_ActivateRenderer(SDL_Renderer * renderer) -{ - SW_RenderData *data = (SW_RenderData *) renderer->driverdata; - - if (!data->surface) { - data->surface = data->window; - } - if (!data->surface) { - SDL_Surface *surface = SDL_GetWindowSurface(renderer->window); - if (surface) { - data->surface = data->window = surface; - - SW_UpdateViewport(renderer); - SW_UpdateClipRect(renderer); - } - } - return data->surface; -} - -SDL_Renderer * -SW_CreateRendererForSurface(SDL_Surface * surface) -{ - SDL_Renderer *renderer; - SW_RenderData *data; - - if (!surface) { - SDL_SetError("Can't create renderer for NULL surface"); - return NULL; - } - - renderer = (SDL_Renderer *) SDL_calloc(1, sizeof(*renderer)); - if (!renderer) { - SDL_OutOfMemory(); - return NULL; - } - - data = (SW_RenderData *) SDL_calloc(1, sizeof(*data)); - if (!data) { - SW_DestroyRenderer(renderer); - SDL_OutOfMemory(); - return NULL; - } - data->surface = surface; - data->window = surface; - - renderer->WindowEvent = SW_WindowEvent; - renderer->GetOutputSize = SW_GetOutputSize; - renderer->CreateTexture = SW_CreateTexture; - renderer->SetTextureColorMod = SW_SetTextureColorMod; - renderer->SetTextureAlphaMod = SW_SetTextureAlphaMod; - renderer->SetTextureBlendMode = SW_SetTextureBlendMode; - renderer->UpdateTexture = SW_UpdateTexture; - renderer->LockTexture = SW_LockTexture; - renderer->UnlockTexture = SW_UnlockTexture; - renderer->SetRenderTarget = SW_SetRenderTarget; - renderer->UpdateViewport = SW_UpdateViewport; - renderer->UpdateClipRect = SW_UpdateClipRect; - renderer->RenderClear = SW_RenderClear; - renderer->RenderDrawPoints = SW_RenderDrawPoints; - renderer->RenderDrawLines = SW_RenderDrawLines; - renderer->RenderFillRects = SW_RenderFillRects; - renderer->RenderCopy = SW_RenderCopy; - renderer->RenderCopyEx = SW_RenderCopyEx; - renderer->RenderReadPixels = SW_RenderReadPixels; - renderer->RenderPresent = SW_RenderPresent; - renderer->DestroyTexture = SW_DestroyTexture; - renderer->DestroyRenderer = SW_DestroyRenderer; - renderer->info = SW_RenderDriver.info; - renderer->driverdata = data; - - SW_ActivateRenderer(renderer); - - return renderer; -} - -SDL_Renderer * -SW_CreateRenderer(SDL_Window * window, Uint32 flags) -{ - SDL_Surface *surface; - - surface = SDL_GetWindowSurface(window); - if (!surface) { - return NULL; - } - return SW_CreateRendererForSurface(surface); -} - -static void -SW_WindowEvent(SDL_Renderer * renderer, const SDL_WindowEvent *event) -{ - SW_RenderData *data = (SW_RenderData *) renderer->driverdata; - - if (event->event == SDL_WINDOWEVENT_SIZE_CHANGED) { - data->surface = NULL; - data->window = NULL; - } -} - -static int -SW_GetOutputSize(SDL_Renderer * renderer, int *w, int *h) -{ - SDL_Surface *surface = SW_ActivateRenderer(renderer); - - if (surface) { - if (w) { - *w = surface->w; - } - if (h) { - *h = surface->h; - } - return 0; - } else { - SDL_SetError("Software renderer doesn't have an output surface"); - return -1; - } -} - -static int -SW_CreateTexture(SDL_Renderer * renderer, SDL_Texture * texture) -{ - int bpp; - Uint32 Rmask, Gmask, Bmask, Amask; - - if (!SDL_PixelFormatEnumToMasks - (texture->format, &bpp, &Rmask, &Gmask, &Bmask, &Amask)) { - return SDL_SetError("Unknown texture format"); - } - - texture->driverdata = - SDL_CreateRGBSurface(0, texture->w, texture->h, bpp, Rmask, Gmask, - Bmask, Amask); - SDL_SetSurfaceColorMod(texture->driverdata, texture->r, texture->g, - texture->b); - SDL_SetSurfaceAlphaMod(texture->driverdata, texture->a); - SDL_SetSurfaceBlendMode(texture->driverdata, texture->blendMode); - - /* Only RLE encode textures without an alpha channel since the RLE coder - * discards the color values of pixels with an alpha value of zero. - */ - if (texture->access == SDL_TEXTUREACCESS_STATIC && !Amask) { - SDL_SetSurfaceRLE(texture->driverdata, 1); - } - - if (!texture->driverdata) { - return -1; - } - return 0; -} - -static int -SW_SetTextureColorMod(SDL_Renderer * renderer, SDL_Texture * texture) -{ - SDL_Surface *surface = (SDL_Surface *) texture->driverdata; - /* If the color mod is ever enabled (non-white), permanently disable RLE (which doesn't support - * color mod) to avoid potentially frequent RLE encoding/decoding. - */ - if ((texture->r & texture->g & texture->b) != 255) { - SDL_SetSurfaceRLE(surface, 0); - } - return SDL_SetSurfaceColorMod(surface, texture->r, texture->g, - texture->b); -} - -static int -SW_SetTextureAlphaMod(SDL_Renderer * renderer, SDL_Texture * texture) -{ - SDL_Surface *surface = (SDL_Surface *) texture->driverdata; - /* If the texture ever has multiple alpha values (surface alpha plus alpha channel), permanently - * disable RLE (which doesn't support this) to avoid potentially frequent RLE encoding/decoding. - */ - if (texture->a != 255 && surface->format->Amask) { - SDL_SetSurfaceRLE(surface, 0); - } - return SDL_SetSurfaceAlphaMod(surface, texture->a); -} - -static int -SW_SetTextureBlendMode(SDL_Renderer * renderer, SDL_Texture * texture) -{ - SDL_Surface *surface = (SDL_Surface *) texture->driverdata; - /* If add or mod blending are ever enabled, permanently disable RLE (which doesn't support - * them) to avoid potentially frequent RLE encoding/decoding. - */ - if ((texture->blendMode == SDL_BLENDMODE_ADD || texture->blendMode == SDL_BLENDMODE_MOD)) { - SDL_SetSurfaceRLE(surface, 0); - } - return SDL_SetSurfaceBlendMode(surface, texture->blendMode); -} - -static int -SW_UpdateTexture(SDL_Renderer * renderer, SDL_Texture * texture, - const SDL_Rect * rect, const void *pixels, int pitch) -{ - SDL_Surface *surface = (SDL_Surface *) texture->driverdata; - Uint8 *src, *dst; - int row; - size_t length; - - if(SDL_MUSTLOCK(surface)) - SDL_LockSurface(surface); - 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; - } - if(SDL_MUSTLOCK(surface)) - SDL_UnlockSurface(surface); - return 0; -} - -static int -SW_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture, - const SDL_Rect * rect, void **pixels, int *pitch) -{ - 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 -SW_UnlockTexture(SDL_Renderer * renderer, SDL_Texture * texture) -{ -} - -static int -SW_SetRenderTarget(SDL_Renderer * renderer, SDL_Texture * texture) -{ - SW_RenderData *data = (SW_RenderData *) renderer->driverdata; - - if (texture ) { - data->surface = (SDL_Surface *) texture->driverdata; - } else { - data->surface = data->window; - } - return 0; -} - -static int -SW_UpdateViewport(SDL_Renderer * renderer) -{ - SW_RenderData *data = (SW_RenderData *) renderer->driverdata; - SDL_Surface *surface = data->surface; - - if (!surface) { - /* We'll update the viewport after we recreate the surface */ - return 0; - } - - SDL_SetClipRect(data->surface, &renderer->viewport); - return 0; -} - -static int -SW_UpdateClipRect(SDL_Renderer * renderer) -{ - SW_RenderData *data = (SW_RenderData *) renderer->driverdata; - SDL_Surface *surface = data->surface; - if (surface) { - if (renderer->clipping_enabled) { - SDL_Rect clip_rect; - clip_rect = renderer->clip_rect; - clip_rect.x += renderer->viewport.x; - clip_rect.y += renderer->viewport.y; - SDL_IntersectRect(&renderer->viewport, &clip_rect, &clip_rect); - SDL_SetClipRect(surface, &clip_rect); - } else { - SDL_SetClipRect(surface, &renderer->viewport); - } - } - return 0; -} - -static int -SW_RenderClear(SDL_Renderer * renderer) -{ - SDL_Surface *surface = SW_ActivateRenderer(renderer); - Uint32 color; - SDL_Rect clip_rect; - - if (!surface) { - return -1; - } - - color = SDL_MapRGBA(surface->format, - renderer->r, renderer->g, renderer->b, renderer->a); - - /* By definition the clear ignores the clip rect */ - clip_rect = surface->clip_rect; - SDL_SetClipRect(surface, NULL); - SDL_FillRect(surface, NULL, color); - SDL_SetClipRect(surface, &clip_rect); - return 0; -} - -static int -SW_RenderDrawPoints(SDL_Renderer * renderer, const SDL_FPoint * points, - int count) -{ - SDL_Surface *surface = SW_ActivateRenderer(renderer); - SDL_Point *final_points; - int i, status; - - if (!surface) { - return -1; - } - - final_points = SDL_stack_alloc(SDL_Point, count); - if (!final_points) { - return SDL_OutOfMemory(); - } - if (renderer->viewport.x || renderer->viewport.y) { - int x = renderer->viewport.x; - int y = renderer->viewport.y; - - for (i = 0; i < count; ++i) { - final_points[i].x = (int)(x + points[i].x); - final_points[i].y = (int)(y + points[i].y); - } - } else { - for (i = 0; i < count; ++i) { - final_points[i].x = (int)points[i].x; - final_points[i].y = (int)points[i].y; - } - } - - /* Draw the points! */ - if (renderer->blendMode == SDL_BLENDMODE_NONE) { - Uint32 color = SDL_MapRGBA(surface->format, - renderer->r, renderer->g, renderer->b, - renderer->a); - - status = SDL_DrawPoints(surface, final_points, count, color); - } else { - status = SDL_BlendPoints(surface, final_points, count, - renderer->blendMode, - renderer->r, renderer->g, renderer->b, - renderer->a); - } - SDL_stack_free(final_points); - - return status; -} - -static int -SW_RenderDrawLines(SDL_Renderer * renderer, const SDL_FPoint * points, - int count) -{ - SDL_Surface *surface = SW_ActivateRenderer(renderer); - SDL_Point *final_points; - int i, status; - - if (!surface) { - return -1; - } - - final_points = SDL_stack_alloc(SDL_Point, count); - if (!final_points) { - return SDL_OutOfMemory(); - } - if (renderer->viewport.x || renderer->viewport.y) { - int x = renderer->viewport.x; - int y = renderer->viewport.y; - - for (i = 0; i < count; ++i) { - final_points[i].x = (int)(x + points[i].x); - final_points[i].y = (int)(y + points[i].y); - } - } else { - for (i = 0; i < count; ++i) { - final_points[i].x = (int)points[i].x; - final_points[i].y = (int)points[i].y; - } - } - - /* Draw the lines! */ - if (renderer->blendMode == SDL_BLENDMODE_NONE) { - Uint32 color = SDL_MapRGBA(surface->format, - renderer->r, renderer->g, renderer->b, - renderer->a); - - status = SDL_DrawLines(surface, final_points, count, color); - } else { - status = SDL_BlendLines(surface, final_points, count, - renderer->blendMode, - renderer->r, renderer->g, renderer->b, - renderer->a); - } - SDL_stack_free(final_points); - - return status; -} - -static int -SW_RenderFillRects(SDL_Renderer * renderer, const SDL_FRect * rects, int count) -{ - SDL_Surface *surface = SW_ActivateRenderer(renderer); - SDL_Rect *final_rects; - int i, status; - - if (!surface) { - return -1; - } - - final_rects = SDL_stack_alloc(SDL_Rect, count); - if (!final_rects) { - return SDL_OutOfMemory(); - } - if (renderer->viewport.x || renderer->viewport.y) { - int x = renderer->viewport.x; - int y = renderer->viewport.y; - - for (i = 0; i < count; ++i) { - final_rects[i].x = (int)(x + rects[i].x); - final_rects[i].y = (int)(y + rects[i].y); - final_rects[i].w = SDL_max((int)rects[i].w, 1); - final_rects[i].h = SDL_max((int)rects[i].h, 1); - } - } else { - for (i = 0; i < count; ++i) { - final_rects[i].x = (int)rects[i].x; - final_rects[i].y = (int)rects[i].y; - final_rects[i].w = SDL_max((int)rects[i].w, 1); - final_rects[i].h = SDL_max((int)rects[i].h, 1); - } - } - - if (renderer->blendMode == SDL_BLENDMODE_NONE) { - Uint32 color = SDL_MapRGBA(surface->format, - renderer->r, renderer->g, renderer->b, - renderer->a); - status = SDL_FillRects(surface, final_rects, count, color); - } else { - status = SDL_BlendFillRects(surface, final_rects, count, - renderer->blendMode, - renderer->r, renderer->g, renderer->b, - renderer->a); - } - SDL_stack_free(final_rects); - - return status; -} - -static int -SW_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture, - const SDL_Rect * srcrect, const SDL_FRect * dstrect) -{ - SDL_Surface *surface = SW_ActivateRenderer(renderer); - SDL_Surface *src = (SDL_Surface *) texture->driverdata; - SDL_Rect final_rect; - - if (!surface) { - return -1; - } - - if (renderer->viewport.x || renderer->viewport.y) { - final_rect.x = (int)(renderer->viewport.x + dstrect->x); - final_rect.y = (int)(renderer->viewport.y + dstrect->y); - } else { - final_rect.x = (int)dstrect->x; - final_rect.y = (int)dstrect->y; - } - final_rect.w = (int)dstrect->w; - final_rect.h = (int)dstrect->h; - - if ( srcrect->w == final_rect.w && srcrect->h == final_rect.h ) { - return SDL_BlitSurface(src, srcrect, surface, &final_rect); - } else { - /* If scaling is ever done, permanently disable RLE (which doesn't support scaling) - * to avoid potentially frequent RLE encoding/decoding. - */ - SDL_SetSurfaceRLE(surface, 0); - return SDL_BlitScaled(src, srcrect, surface, &final_rect); - } -} - -static int -SW_RenderCopyEx(SDL_Renderer * renderer, SDL_Texture * texture, - const SDL_Rect * srcrect, const SDL_FRect * dstrect, - const double angle, const SDL_FPoint * center, const SDL_RendererFlip flip) -{ - SDL_Surface *surface = SW_ActivateRenderer(renderer); - SDL_Surface *src = (SDL_Surface *) texture->driverdata; - SDL_Rect final_rect, tmp_rect; - SDL_Surface *src_clone, *src_rotated, *src_scaled; - SDL_Surface *mask = NULL, *mask_rotated = NULL; - int retval = 0, dstwidth, dstheight, abscenterx, abscentery; - double cangle, sangle, px, py, p1x, p1y, p2x, p2y, p3x, p3y, p4x, p4y; - SDL_BlendMode blendmode; - Uint8 alphaMod, rMod, gMod, bMod; - int applyModulation = SDL_FALSE; - int blitRequired = SDL_FALSE; - int isOpaque = SDL_FALSE; - - if (!surface) { - return -1; - } - - if (renderer->viewport.x || renderer->viewport.y) { - final_rect.x = (int)(renderer->viewport.x + dstrect->x); - final_rect.y = (int)(renderer->viewport.y + dstrect->y); - } else { - final_rect.x = (int)dstrect->x; - final_rect.y = (int)dstrect->y; - } - final_rect.w = (int)dstrect->w; - final_rect.h = (int)dstrect->h; - - tmp_rect = final_rect; - tmp_rect.x = 0; - tmp_rect.y = 0; - - /* It is possible to encounter an RLE encoded surface here and locking it is - * necessary because this code is going to access the pixel buffer directly. - */ - if (SDL_MUSTLOCK(src)) { - SDL_LockSurface(src); - } - - /* Clone the source surface but use its pixel buffer directly. - * The original source surface must be treated as read-only. - */ - src_clone = SDL_CreateRGBSurfaceFrom(src->pixels, src->w, src->h, src->format->BitsPerPixel, src->pitch, - src->format->Rmask, src->format->Gmask, - src->format->Bmask, src->format->Amask); - if (src_clone == NULL) { - if (SDL_MUSTLOCK(src)) { - SDL_UnlockSurface(src); - } - return -1; - } - - SDL_GetSurfaceBlendMode(src, &blendmode); - SDL_GetSurfaceAlphaMod(src, &alphaMod); - SDL_GetSurfaceColorMod(src, &rMod, &gMod, &bMod); - - /* SDLgfx_rotateSurface only accepts 32-bit surfaces with a 8888 layout. Everything else has to be converted. */ - if (src->format->BitsPerPixel != 32 || SDL_PIXELLAYOUT(src->format->format) != SDL_PACKEDLAYOUT_8888 || !src->format->Amask) { - blitRequired = SDL_TRUE; - } - - /* If scaling and cropping is necessary, it has to be taken care of before the rotation. */ - if (!(srcrect->w == final_rect.w && srcrect->h == final_rect.h && srcrect->x == 0 && srcrect->y == 0)) { - blitRequired = SDL_TRUE; - } - - /* srcrect is not selecting the whole src surface, so cropping is needed */ - if (!(srcrect->w == src->w && srcrect->h == src->h && srcrect->x == 0 && srcrect->y == 0)) { - blitRequired = SDL_TRUE; - } - - /* The color and alpha modulation has to be applied before the rotation when using the NONE and MOD blend modes. */ - if ((blendmode == SDL_BLENDMODE_NONE || blendmode == SDL_BLENDMODE_MOD) && (alphaMod & rMod & gMod & bMod) != 255) { - applyModulation = SDL_TRUE; - SDL_SetSurfaceAlphaMod(src_clone, alphaMod); - SDL_SetSurfaceColorMod(src_clone, rMod, gMod, bMod); - } - - /* Opaque surfaces are much easier to handle with the NONE blend mode. */ - if (blendmode == SDL_BLENDMODE_NONE && !src->format->Amask && alphaMod == 255) { - isOpaque = SDL_TRUE; - } - - /* The NONE blend mode requires a mask for non-opaque surfaces. This mask will be used - * to clear the pixels in the destination surface. The other steps are explained below. - */ - if (blendmode == SDL_BLENDMODE_NONE && !isOpaque) { - mask = SDL_CreateRGBSurface(0, final_rect.w, final_rect.h, 32, - 0x00ff0000, 0x0000ff00, 0x000000ff, 0xff000000); - if (mask == NULL) { - retval = -1; - } else { - SDL_SetSurfaceBlendMode(mask, SDL_BLENDMODE_MOD); - } - } - - /* Create a new surface should there be a format mismatch or if scaling, cropping, - * or modulation is required. It's possible to use the source surface directly otherwise. - */ - if (!retval && (blitRequired || applyModulation)) { - SDL_Rect scale_rect = tmp_rect; - src_scaled = SDL_CreateRGBSurface(0, final_rect.w, final_rect.h, 32, - 0x00ff0000, 0x0000ff00, 0x000000ff, 0xff000000); - if (src_scaled == NULL) { - retval = -1; - } else { - SDL_SetSurfaceBlendMode(src_clone, SDL_BLENDMODE_NONE); - retval = SDL_BlitScaled(src_clone, srcrect, src_scaled, &scale_rect); - SDL_FreeSurface(src_clone); - src_clone = src_scaled; - src_scaled = NULL; - } - } - - /* SDLgfx_rotateSurface is going to make decisions depending on the blend mode. */ - SDL_SetSurfaceBlendMode(src_clone, blendmode); - - if (!retval) { - SDLgfx_rotozoomSurfaceSizeTrig(tmp_rect.w, tmp_rect.h, angle, &dstwidth, &dstheight, &cangle, &sangle); - src_rotated = SDLgfx_rotateSurface(src_clone, angle, dstwidth/2, dstheight/2, (texture->scaleMode == SDL_ScaleModeNearest) ? 0 : 1, flip & SDL_FLIP_HORIZONTAL, flip & SDL_FLIP_VERTICAL, dstwidth, dstheight, cangle, sangle); - if (src_rotated == NULL) { - retval = -1; - } - if (!retval && mask != NULL) { - /* The mask needed for the NONE blend mode gets rotated with the same parameters. */ - mask_rotated = SDLgfx_rotateSurface(mask, angle, dstwidth/2, dstheight/2, SDL_FALSE, 0, 0, dstwidth, dstheight, cangle, sangle); - if (mask_rotated == NULL) { - retval = -1; - } - } - if (!retval) { - /* Find out where the new origin is by rotating the four final_rect points around the center and then taking the extremes */ - abscenterx = final_rect.x + (int)center->x; - abscentery = final_rect.y + (int)center->y; - /* Compensate the angle inversion to match the behaviour of the other backends */ - sangle = -sangle; - - /* Top Left */ - px = final_rect.x - abscenterx; - py = final_rect.y - abscentery; - p1x = px * cangle - py * sangle + abscenterx; - p1y = px * sangle + py * cangle + abscentery; - - /* Top Right */ - px = final_rect.x + final_rect.w - abscenterx; - py = final_rect.y - abscentery; - p2x = px * cangle - py * sangle + abscenterx; - p2y = px * sangle + py * cangle + abscentery; - - /* Bottom Left */ - px = final_rect.x - abscenterx; - py = final_rect.y + final_rect.h - abscentery; - p3x = px * cangle - py * sangle + abscenterx; - p3y = px * sangle + py * cangle + abscentery; - - /* Bottom Right */ - px = final_rect.x + final_rect.w - abscenterx; - py = final_rect.y + final_rect.h - abscentery; - p4x = px * cangle - py * sangle + abscenterx; - p4y = px * sangle + py * cangle + abscentery; - - tmp_rect.x = (int)MIN(MIN(p1x, p2x), MIN(p3x, p4x)); - tmp_rect.y = (int)MIN(MIN(p1y, p2y), MIN(p3y, p4y)); - tmp_rect.w = dstwidth; - tmp_rect.h = dstheight; - - /* The NONE blend mode needs some special care with non-opaque surfaces. - * Other blend modes or opaque surfaces can be blitted directly. - */ - if (blendmode != SDL_BLENDMODE_NONE || isOpaque) { - if (applyModulation == SDL_FALSE) { - /* If the modulation wasn't already applied, make it happen now. */ - SDL_SetSurfaceAlphaMod(src_rotated, alphaMod); - SDL_SetSurfaceColorMod(src_rotated, rMod, gMod, bMod); - } - retval = SDL_BlitSurface(src_rotated, NULL, surface, &tmp_rect); - } else { - /* The NONE blend mode requires three steps to get the pixels onto the destination surface. - * First, the area where the rotated pixels will be blitted to get set to zero. - * This is accomplished by simply blitting a mask with the NONE blend mode. - * The colorkey set by the rotate function will discard the correct pixels. - */ - SDL_Rect mask_rect = tmp_rect; - SDL_SetSurfaceBlendMode(mask_rotated, SDL_BLENDMODE_NONE); - retval = SDL_BlitSurface(mask_rotated, NULL, surface, &mask_rect); - if (!retval) { - /* The next step copies the alpha value. This is done with the BLEND blend mode and - * by modulating the source colors with 0. Since the destination is all zeros, this - * will effectively set the destination alpha to the source alpha. - */ - SDL_SetSurfaceColorMod(src_rotated, 0, 0, 0); - mask_rect = tmp_rect; - retval = SDL_BlitSurface(src_rotated, NULL, surface, &mask_rect); - if (!retval) { - /* The last step gets the color values in place. The ADD blend mode simply adds them to - * the destination (where the color values are all zero). However, because the ADD blend - * mode modulates the colors with the alpha channel, a surface without an alpha mask needs - * to be created. This makes all source pixels opaque and the colors get copied correctly. - */ - SDL_Surface *src_rotated_rgb; - src_rotated_rgb = SDL_CreateRGBSurfaceFrom(src_rotated->pixels, src_rotated->w, src_rotated->h, - src_rotated->format->BitsPerPixel, src_rotated->pitch, - src_rotated->format->Rmask, src_rotated->format->Gmask, - src_rotated->format->Bmask, 0); - if (src_rotated_rgb == NULL) { - retval = -1; - } else { - SDL_SetSurfaceBlendMode(src_rotated_rgb, SDL_BLENDMODE_ADD); - retval = SDL_BlitSurface(src_rotated_rgb, NULL, surface, &tmp_rect); - SDL_FreeSurface(src_rotated_rgb); - } - } - } - SDL_FreeSurface(mask_rotated); - } - if (src_rotated != NULL) { - SDL_FreeSurface(src_rotated); - } - } - } - - if (SDL_MUSTLOCK(src)) { - SDL_UnlockSurface(src); - } - if (mask != NULL) { - SDL_FreeSurface(mask); - } - if (src_clone != NULL) { - SDL_FreeSurface(src_clone); - } - return retval; -} - -static int -SW_RenderReadPixels(SDL_Renderer * renderer, const SDL_Rect * rect, - Uint32 format, void * pixels, int pitch) -{ - SDL_Surface *surface = SW_ActivateRenderer(renderer); - Uint32 src_format; - void *src_pixels; - - if (!surface) { - return -1; - } - - /* NOTE: The rect is already adjusted according to the viewport by - * SDL_RenderReadPixels. - */ - - if (rect->x < 0 || rect->x+rect->w > surface->w || - rect->y < 0 || rect->y+rect->h > surface->h) { - return SDL_SetError("Tried to read outside of surface bounds"); - } - - src_format = surface->format->format; - src_pixels = (void*)((Uint8 *) surface->pixels + - rect->y * surface->pitch + - rect->x * surface->format->BytesPerPixel); - - return SDL_ConvertPixels(rect->w, rect->h, - src_format, src_pixels, surface->pitch, - format, pixels, pitch); -} - -static void -SW_RenderPresent(SDL_Renderer * renderer) -{ - SDL_Window *window = renderer->window; - - if (window) { - SDL_UpdateWindowSurface(window); - } -} - -static void -SW_DestroyTexture(SDL_Renderer * renderer, SDL_Texture * texture) -{ - SDL_Surface *surface = (SDL_Surface *) texture->driverdata; - - SDL_FreeSurface(surface); -} - -static void -SW_DestroyRenderer(SDL_Renderer * renderer) -{ - SW_RenderData *data = (SW_RenderData *) renderer->driverdata; - - SDL_free(data); - SDL_free(renderer); -} - -#endif /* !SDL_RENDER_DISABLED */ - -/* vi: set ts=4 sw=4 expandtab: */ |