| | |
| | | /* |
| | | Simple DirectMedia Layer |
| | | Copyright (C) 1997-2014 Sam Lantinga <slouken@libsdl.org> |
| | | 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 |
| | |
| | | SDL_RENDERER_SOFTWARE | SDL_RENDERER_TARGETTEXTURE, |
| | | 8, |
| | | { |
| | | SDL_PIXELFORMAT_RGB555, |
| | | SDL_PIXELFORMAT_RGB565, |
| | | SDL_PIXELFORMAT_ARGB8888, |
| | | SDL_PIXELFORMAT_ABGR8888, |
| | | SDL_PIXELFORMAT_RGBA8888, |
| | | SDL_PIXELFORMAT_BGRA8888, |
| | | SDL_PIXELFORMAT_RGB888, |
| | | SDL_PIXELFORMAT_BGR888, |
| | | SDL_PIXELFORMAT_ARGB8888, |
| | | SDL_PIXELFORMAT_RGBA8888, |
| | | SDL_PIXELFORMAT_ABGR8888, |
| | | SDL_PIXELFORMAT_BGRA8888 |
| | | SDL_PIXELFORMAT_RGB565, |
| | | SDL_PIXELFORMAT_RGB555 |
| | | }, |
| | | 0, |
| | | 0} |
| | |
| | | return NULL; |
| | | } |
| | | data->surface = surface; |
| | | data->window = surface; |
| | | |
| | | renderer->WindowEvent = SW_WindowEvent; |
| | | renderer->GetOutputSize = SW_GetOutputSize; |
| | |
| | | SDL_SetSurfaceAlphaMod(texture->driverdata, texture->a); |
| | | SDL_SetSurfaceBlendMode(texture->driverdata, texture->blendMode); |
| | | |
| | | if (texture->access == SDL_TEXTUREACCESS_STATIC) { |
| | | /* 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); |
| | | } |
| | | |
| | |
| | | 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); |
| | | } |
| | |
| | | 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); |
| | | } |
| | | |
| | |
| | | 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); |
| | | } |
| | | |
| | |
| | | { |
| | | SW_RenderData *data = (SW_RenderData *) renderer->driverdata; |
| | | SDL_Surface *surface = data->surface; |
| | | const SDL_Rect *rect = &renderer->clip_rect; |
| | | |
| | | if (surface) { |
| | | if (!SDL_RectEmpty(rect)) { |
| | | SDL_SetClipRect(surface, rect); |
| | | 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, NULL); |
| | | SDL_SetClipRect(surface, &renderer->viewport); |
| | | } |
| | | } |
| | | return 0; |
| | |
| | | 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 |
| | | GetScaleQuality(void) |
| | | { |
| | | const char *hint = SDL_GetHint(SDL_HINT_RENDER_SCALE_QUALITY); |
| | | |
| | | if (!hint || *hint == '0' || SDL_strcasecmp(hint, "nearest") == 0) { |
| | | return 0; |
| | | } else { |
| | | return 1; |
| | | } |
| | | } |
| | | |
| | |
| | | SDL_Surface *surface = SW_ActivateRenderer(renderer); |
| | | SDL_Surface *src = (SDL_Surface *) texture->driverdata; |
| | | SDL_Rect final_rect, tmp_rect; |
| | | SDL_Surface *surface_rotated, *surface_scaled; |
| | | Uint32 colorkey; |
| | | int retval, dstwidth, dstheight, abscenterx, abscentery; |
| | | 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; |
| | |
| | | final_rect.w = (int)dstrect->w; |
| | | final_rect.h = (int)dstrect->h; |
| | | |
| | | surface_scaled = SDL_CreateRGBSurface(SDL_SWSURFACE, final_rect.w, final_rect.h, src->format->BitsPerPixel, |
| | | src->format->Rmask, src->format->Gmask, |
| | | src->format->Bmask, src->format->Amask ); |
| | | if (surface_scaled) { |
| | | SDL_GetColorKey(src, &colorkey); |
| | | SDL_SetColorKey(surface_scaled, SDL_TRUE, colorkey); |
| | | tmp_rect = final_rect; |
| | | tmp_rect.x = 0; |
| | | tmp_rect.y = 0; |
| | | tmp_rect = final_rect; |
| | | tmp_rect.x = 0; |
| | | tmp_rect.y = 0; |
| | | |
| | | retval = SDL_BlitScaled(src, srcrect, surface_scaled, &tmp_rect); |
| | | if (!retval) { |
| | | SDLgfx_rotozoomSurfaceSizeTrig(tmp_rect.w, tmp_rect.h, -angle, &dstwidth, &dstheight, &cangle, &sangle); |
| | | surface_rotated = SDLgfx_rotateSurface(surface_scaled, -angle, dstwidth/2, dstheight/2, GetScaleQuality(), flip & SDL_FLIP_HORIZONTAL, flip & SDL_FLIP_VERTICAL, dstwidth, dstheight, cangle, sangle); |
| | | if(surface_rotated) { |
| | | /* 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; |
| | | |
| | | retval = SDL_BlitSurface(surface_rotated, NULL, surface, &tmp_rect); |
| | | SDL_FreeSurface(surface_scaled); |
| | | SDL_FreeSurface(surface_rotated); |
| | | return retval; |
| | | } |
| | | } |
| | | return retval; |
| | | /* 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); |
| | | } |
| | | |
| | | return -1; |
| | | /* 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 |
| | |
| | | SDL_Surface *surface = SW_ActivateRenderer(renderer); |
| | | Uint32 src_format; |
| | | void *src_pixels; |
| | | SDL_Rect final_rect; |
| | | |
| | | if (!surface) { |
| | | return -1; |
| | | } |
| | | |
| | | if (renderer->viewport.x || renderer->viewport.y) { |
| | | final_rect.x = renderer->viewport.x + rect->x; |
| | | final_rect.y = renderer->viewport.y + rect->y; |
| | | final_rect.w = rect->w; |
| | | final_rect.h = rect->h; |
| | | rect = &final_rect; |
| | | } |
| | | /* 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) { |