ref: 9eaba52cafcac7c2f3bfc72d7be1f15893196be1
dir: /external/SDL2/src/render/SDL_render.c/
/* 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" /* The SDL 2D rendering system */ #include "SDL_assert.h" #include "SDL_hints.h" #include "SDL_log.h" #include "SDL_render.h" #include "SDL_sysrender.h" #include "software/SDL_render_sw_c.h" #define SDL_WINDOWRENDERDATA "_SDL_WindowRenderData" #define CHECK_RENDERER_MAGIC(renderer, retval) \ SDL_assert(renderer && renderer->magic == &renderer_magic); \ if (!renderer || renderer->magic != &renderer_magic) { \ SDL_SetError("Invalid renderer"); \ return retval; \ } #define CHECK_TEXTURE_MAGIC(texture, retval) \ SDL_assert(texture && texture->magic == &texture_magic); \ if (!texture || texture->magic != &texture_magic) { \ SDL_SetError("Invalid texture"); \ return retval; \ } /* Predefined blend modes */ #define SDL_COMPOSE_BLENDMODE(srcColorFactor, dstColorFactor, colorOperation, \ srcAlphaFactor, dstAlphaFactor, alphaOperation) \ (SDL_BlendMode)(((Uint32)colorOperation << 0) | \ ((Uint32)srcColorFactor << 4) | \ ((Uint32)dstColorFactor << 8) | \ ((Uint32)alphaOperation << 16) | \ ((Uint32)srcAlphaFactor << 20) | \ ((Uint32)dstAlphaFactor << 24)) #define SDL_BLENDMODE_NONE_FULL \ SDL_COMPOSE_BLENDMODE(SDL_BLENDFACTOR_ONE, SDL_BLENDFACTOR_ZERO, SDL_BLENDOPERATION_ADD, \ SDL_BLENDFACTOR_ONE, SDL_BLENDFACTOR_ZERO, SDL_BLENDOPERATION_ADD) #define SDL_BLENDMODE_BLEND_FULL \ SDL_COMPOSE_BLENDMODE(SDL_BLENDFACTOR_SRC_ALPHA, SDL_BLENDFACTOR_ONE_MINUS_SRC_ALPHA, SDL_BLENDOPERATION_ADD, \ SDL_BLENDFACTOR_ONE, SDL_BLENDFACTOR_ONE_MINUS_SRC_ALPHA, SDL_BLENDOPERATION_ADD) #define SDL_BLENDMODE_ADD_FULL \ SDL_COMPOSE_BLENDMODE(SDL_BLENDFACTOR_SRC_ALPHA, SDL_BLENDFACTOR_ONE, SDL_BLENDOPERATION_ADD, \ SDL_BLENDFACTOR_ZERO, SDL_BLENDFACTOR_ONE, SDL_BLENDOPERATION_ADD) #define SDL_BLENDMODE_MOD_FULL \ SDL_COMPOSE_BLENDMODE(SDL_BLENDFACTOR_ZERO, SDL_BLENDFACTOR_SRC_COLOR, SDL_BLENDOPERATION_ADD, \ SDL_BLENDFACTOR_ZERO, SDL_BLENDFACTOR_ONE, SDL_BLENDOPERATION_ADD) #if !SDL_RENDER_DISABLED static const SDL_RenderDriver *render_drivers[] = { #if SDL_VIDEO_RENDER_D3D &D3D_RenderDriver, #endif #if SDL_VIDEO_RENDER_D3D11 &D3D11_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_METAL &METAL_RenderDriver, #endif #if SDL_VIDEO_RENDER_PSP &PSP_RenderDriver, #endif &SW_RenderDriver }; #endif /* !SDL_RENDER_DISABLED */ static char renderer_magic; static char texture_magic; static int UpdateLogicalSize(SDL_Renderer *renderer); int SDL_GetNumRenderDrivers(void) { #if !SDL_RENDER_DISABLED return SDL_arraysize(render_drivers); #else return 0; #endif } int SDL_GetRenderDriverInfo(int index, SDL_RendererInfo * info) { #if !SDL_RENDER_DISABLED if (index < 0 || index >= SDL_GetNumRenderDrivers()) { return SDL_SetError("index must be in the range of 0 - %d", SDL_GetNumRenderDrivers() - 1); } *info = render_drivers[index]->info; return 0; #else return SDL_SetError("SDL not built with rendering support"); #endif } static void GetWindowViewportValues(SDL_Renderer *renderer, int *logical_w, int *logical_h, SDL_Rect *viewport, SDL_FPoint *scale) { SDL_LockMutex(renderer->target_mutex); *logical_w = renderer->target ? renderer->logical_w_backup : renderer->logical_w; *logical_h = renderer->target ? renderer->logical_h_backup : renderer->logical_h; *viewport = renderer->target ? renderer->viewport_backup : renderer->viewport; *scale = renderer->target ? renderer->scale_backup : renderer->scale; SDL_UnlockMutex(renderer->target_mutex); } static int SDLCALL 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) { /* Make sure we're operating on the default render target */ SDL_Texture *saved_target = SDL_GetRenderTarget(renderer); if (saved_target) { SDL_SetRenderTarget(renderer, NULL); } if (renderer->logical_w) { UpdateLogicalSize(renderer); } else { /* Window was resized, reset viewport */ int w, h; if (renderer->GetOutputSize) { renderer->GetOutputSize(renderer, &w, &h); } else { SDL_GetWindowSize(renderer->window, &w, &h); } if (renderer->target) { renderer->viewport_backup.x = 0; renderer->viewport_backup.y = 0; renderer->viewport_backup.w = w; renderer->viewport_backup.h = h; } else { renderer->viewport.x = 0; renderer->viewport.y = 0; renderer->viewport.w = w; renderer->viewport.h = h; renderer->UpdateViewport(renderer); } } if (saved_target) { SDL_SetRenderTarget(renderer, saved_target); } } else if (event->window.event == SDL_WINDOWEVENT_HIDDEN) { renderer->hidden = SDL_TRUE; } else if (event->window.event == SDL_WINDOWEVENT_SHOWN) { if (!(SDL_GetWindowFlags(window) & SDL_WINDOW_MINIMIZED)) { renderer->hidden = SDL_FALSE; } } else if (event->window.event == SDL_WINDOWEVENT_MINIMIZED) { renderer->hidden = SDL_TRUE; } else if (event->window.event == SDL_WINDOWEVENT_RESTORED || event->window.event == SDL_WINDOWEVENT_MAXIMIZED) { if (!(SDL_GetWindowFlags(window) & SDL_WINDOW_HIDDEN)) { renderer->hidden = SDL_FALSE; } } } } else if (event->type == SDL_MOUSEMOTION) { SDL_Window *window = SDL_GetWindowFromID(event->motion.windowID); if (window == renderer->window) { int logical_w, logical_h; SDL_Rect viewport; SDL_FPoint scale; GetWindowViewportValues(renderer, &logical_w, &logical_h, &viewport, &scale); if (logical_w) { event->motion.x -= (int)(viewport.x * renderer->dpi_scale.x); event->motion.y -= (int)(viewport.y * renderer->dpi_scale.y); event->motion.x = (int)(event->motion.x / (scale.x * renderer->dpi_scale.x)); event->motion.y = (int)(event->motion.y / (scale.y * renderer->dpi_scale.y)); if (event->motion.xrel > 0) { event->motion.xrel = SDL_max(1, (int)(event->motion.xrel / (scale.x * renderer->dpi_scale.x))); } else if (event->motion.xrel < 0) { event->motion.xrel = SDL_min(-1, (int)(event->motion.xrel / (scale.x * renderer->dpi_scale.x))); } if (event->motion.yrel > 0) { event->motion.yrel = SDL_max(1, (int)(event->motion.yrel / (scale.y * renderer->dpi_scale.y))); } else if (event->motion.yrel < 0) { event->motion.yrel = SDL_min(-1, (int)(event->motion.yrel / (scale.y * renderer->dpi_scale.y))); } } } } else if (event->type == SDL_MOUSEBUTTONDOWN || event->type == SDL_MOUSEBUTTONUP) { SDL_Window *window = SDL_GetWindowFromID(event->button.windowID); if (window == renderer->window) { int logical_w, logical_h; SDL_Rect viewport; SDL_FPoint scale; GetWindowViewportValues(renderer, &logical_w, &logical_h, &viewport, &scale); if (logical_w) { event->button.x -= (int)(viewport.x * renderer->dpi_scale.x); event->button.y -= (int)(viewport.y * renderer->dpi_scale.y); event->button.x = (int)(event->button.x / (scale.x * renderer->dpi_scale.x)); event->button.y = (int)(event->button.y / (scale.y * renderer->dpi_scale.y)); } } } else if (event->type == SDL_FINGERDOWN || event->type == SDL_FINGERUP || event->type == SDL_FINGERMOTION) { int logical_w, logical_h; SDL_Rect viewport; SDL_FPoint scale; GetWindowViewportValues(renderer, &logical_w, &logical_h, &viewport, &scale); if (logical_w) { int w = 1; int h = 1; SDL_GetRendererOutputSize(renderer, &w, &h); event->tfinger.x *= (w - 1); event->tfinger.y *= (h - 1); event->tfinger.x -= (viewport.x * renderer->dpi_scale.x); event->tfinger.y -= (viewport.y * renderer->dpi_scale.y); event->tfinger.x = (event->tfinger.x / (scale.x * renderer->dpi_scale.x)); event->tfinger.y = (event->tfinger.y / (scale.y * renderer->dpi_scale.y)); if (logical_w > 1) { event->tfinger.x = event->tfinger.x / (logical_w - 1); } else { event->tfinger.x = 0.5f; } if (logical_h > 1) { event->tfinger.y = event->tfinger.y / (logical_h - 1); } else { event->tfinger.y = 0.5f; } } } return 0; } int SDL_CreateWindowAndRenderer(int width, int height, Uint32 window_flags, SDL_Window **window, SDL_Renderer **renderer) { *window = SDL_CreateWindow(NULL, SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, width, height, window_flags); if (!*window) { *renderer = NULL; return -1; } *renderer = SDL_CreateRenderer(*window, -1, 0); if (!*renderer) { return -1; } return 0; } SDL_Renderer * SDL_CreateRenderer(SDL_Window * window, int index, Uint32 flags) { #if !SDL_RENDER_DISABLED SDL_Renderer *renderer = NULL; int n = SDL_GetNumRenderDrivers(); const char *hint; if (!window) { SDL_SetError("Invalid window"); return NULL; } if (SDL_GetRenderer(window)) { SDL_SetError("Renderer already associated with window"); return NULL; } if (SDL_GetHint(SDL_HINT_RENDER_VSYNC)) { if (SDL_GetHintBoolean(SDL_HINT_RENDER_VSYNC, SDL_TRUE)) { 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; renderer->target_mutex = SDL_CreateMutex(); renderer->scale.x = 1.0f; renderer->scale.y = 1.0f; renderer->dpi_scale.x = 1.0f; renderer->dpi_scale.y = 1.0f; if (window && renderer->GetOutputSize) { int window_w, window_h; int output_w, output_h; if (renderer->GetOutputSize(renderer, &output_w, &output_h) == 0) { SDL_GetWindowSize(renderer->window, &window_w, &window_h); renderer->dpi_scale.x = (float)window_w / output_w; renderer->dpi_scale.y = (float)window_h / output_h; } } if (SDL_GetWindowFlags(window) & (SDL_WINDOW_HIDDEN|SDL_WINDOW_MINIMIZED)) { renderer->hidden = SDL_TRUE; } else { renderer->hidden = SDL_FALSE; } SDL_SetWindowData(window, SDL_WINDOWRENDERDATA, renderer); SDL_RenderSetViewport(renderer, NULL); SDL_AddEventWatch(SDL_RendererEventWatch, renderer); SDL_LogInfo(SDL_LOG_CATEGORY_RENDER, "Created renderer: %s", renderer->info.name); } return renderer; #else SDL_SetError("SDL not built with rendering support"); return NULL; #endif } SDL_Renderer * SDL_CreateSoftwareRenderer(SDL_Surface * surface) { #if !SDL_RENDER_DISABLED SDL_Renderer *renderer; renderer = SW_CreateRendererForSurface(surface); if (renderer) { renderer->magic = &renderer_magic; renderer->target_mutex = SDL_CreateMutex(); renderer->scale.x = 1.0f; renderer->scale.y = 1.0f; SDL_RenderSetViewport(renderer, NULL); } return renderer; #else SDL_SetError("SDL not built with rendering support"); return NULL; #endif /* !SDL_RENDER_DISABLED */ } SDL_Renderer * SDL_GetRenderer(SDL_Window * window) { return (SDL_Renderer *)SDL_GetWindowData(window, SDL_WINDOWRENDERDATA); } int SDL_GetRendererInfo(SDL_Renderer * renderer, SDL_RendererInfo * info) { CHECK_RENDERER_MAGIC(renderer, -1); *info = renderer->info; return 0; } int SDL_GetRendererOutputSize(SDL_Renderer * renderer, int *w, int *h) { CHECK_RENDERER_MAGIC(renderer, -1); if (renderer->target) { return SDL_QueryTexture(renderer->target, NULL, NULL, w, h); } else if (renderer->GetOutputSize) { return renderer->GetOutputSize(renderer, w, h); } else if (renderer->window) { SDL_GetWindowSize(renderer->window, w, h); return 0; } else { SDL_assert(0 && "This should never happen"); return SDL_SetError("Renderer doesn't support querying output size"); } } static SDL_bool IsSupportedBlendMode(SDL_Renderer * renderer, SDL_BlendMode blendMode) { switch (blendMode) { /* These are required to be supported by all renderers */ case SDL_BLENDMODE_NONE: case SDL_BLENDMODE_BLEND: case SDL_BLENDMODE_ADD: case SDL_BLENDMODE_MOD: return SDL_TRUE; default: return renderer->SupportsBlendMode && renderer->SupportsBlendMode(renderer, blendMode); } } 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]; } static SDL_ScaleMode SDL_GetScaleMode(void) { const char *hint = SDL_GetHint(SDL_HINT_RENDER_SCALE_QUALITY); if (!hint || SDL_strcasecmp(hint, "nearest") == 0) { return SDL_ScaleModeNearest; } else if (SDL_strcasecmp(hint, "linear") == 0) { return SDL_ScaleModeLinear; } else if (SDL_strcasecmp(hint, "best") == 0) { return SDL_ScaleModeBest; } else { return (SDL_ScaleMode)SDL_atoi(hint); } } 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_BYTESPERPIXEL(format) == 0) { SDL_SetError("Invalid texture format"); return NULL; } 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; } if ((renderer->info.max_texture_width && w > renderer->info.max_texture_width) || (renderer->info.max_texture_height && h > renderer->info.max_texture_height)) { SDL_SetError("Texture dimensions are limited to %dx%d", renderer->info.max_texture_width, renderer->info.max_texture_height); 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->scaleMode = SDL_GetScaleMode(); 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 NULL; } } else { texture->native = SDL_CreateTexture(renderer, GetClosestSupportedFormat(renderer, format), access, w, h); if (!texture->native) { SDL_DestroyTexture(texture); return NULL; } /* Swap textures to have texture before texture->native in the list */ texture->native->next = texture->next; if (texture->native->next) { texture->native->next->prev = texture->native; } texture->prev = texture->native->prev; if (texture->prev) { texture->prev->next = texture; } texture->native->prev = texture; texture->next = texture->native; renderer->textures = texture; 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_HasColorKey(surface)) { 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); if (!dst_fmt) { SDL_DestroyTexture(texture); return NULL; } 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_HasColorKey(surface)) { /* 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) { CHECK_TEXTURE_MAGIC(texture, -1); 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; if (!IsSupportedBlendMode(renderer, blendMode)) { return SDL_Unsupported(); } 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 = NULL; int native_pitch = 0; 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 */ const int temp_pitch = (((rect->w * SDL_BYTESPERPIXEL(native->format)) + 3) & ~3); const size_t alloclen = rect->h * temp_pitch; if (alloclen > 0) { void *temp_pixels = SDL_malloc(alloclen); if (!temp_pixels) { return SDL_OutOfMemory(); } 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 (!rect->w || !rect->h) { return 0; /* nothing to do. */ } if (texture->access == SDL_TEXTUREACCESS_STREAMING) { /* We can lock the texture and copy to it */ void *native_pixels = NULL; int native_pitch = 0; 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 */ const int temp_pitch = (((rect->w * SDL_BYTESPERPIXEL(native->format)) + 3) & ~3); const size_t alloclen = rect->h * temp_pitch; if (alloclen > 0) { void *temp_pixels = SDL_malloc(alloclen); if (!temp_pixels) { return SDL_OutOfMemory(); } 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 (!pixels) { return SDL_InvalidParamError("pixels"); } if (!pitch) { return SDL_InvalidParamError("pitch"); } if (!rect) { full_rect.x = 0; full_rect.y = 0; full_rect.w = texture->w; full_rect.h = texture->h; rect = &full_rect; } if ((rect->w == 0) || (rect->h == 0)) { return 0; /* nothing to do. */ } else 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_UpdateTextureYUVPlanar(SDL_Texture * texture, const SDL_Rect * rect, const Uint8 *Yplane, int Ypitch, const Uint8 *Uplane, int Upitch, const Uint8 *Vplane, int Vpitch) { SDL_Texture *native = texture->native; SDL_Rect full_rect; if (SDL_SW_UpdateYUVTexturePlanar(texture->yuv, rect, Yplane, Ypitch, Uplane, Upitch, Vplane, Vpitch) < 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 (!rect->w || !rect->h) { return 0; /* nothing to do. */ } if (texture->access == SDL_TEXTUREACCESS_STREAMING) { /* We can lock the texture and copy to it */ void *native_pixels = NULL; int native_pitch = 0; 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 */ const int temp_pitch = (((rect->w * SDL_BYTESPERPIXEL(native->format)) + 3) & ~3); const size_t alloclen = rect->h * temp_pitch; if (alloclen > 0) { void *temp_pixels = SDL_malloc(alloclen); if (!temp_pixels) { return SDL_OutOfMemory(); } 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; } int SDL_UpdateYUVTexture(SDL_Texture * texture, const SDL_Rect * rect, const Uint8 *Yplane, int Ypitch, const Uint8 *Uplane, int Upitch, const Uint8 *Vplane, int Vpitch) { SDL_Renderer *renderer; SDL_Rect full_rect; CHECK_TEXTURE_MAGIC(texture, -1); if (!Yplane) { return SDL_InvalidParamError("Yplane"); } if (!Ypitch) { return SDL_InvalidParamError("Ypitch"); } if (!Uplane) { return SDL_InvalidParamError("Uplane"); } if (!Upitch) { return SDL_InvalidParamError("Upitch"); } if (!Vplane) { return SDL_InvalidParamError("Vplane"); } if (!Vpitch) { return SDL_InvalidParamError("Vpitch"); } if (texture->format != SDL_PIXELFORMAT_YV12 && texture->format != SDL_PIXELFORMAT_IYUV) { return SDL_SetError("Texture format must by YV12 or IYUV"); } if (!rect) { full_rect.x = 0; full_rect.y = 0; full_rect.w = texture->w; full_rect.h = texture->h; rect = &full_rect; } if (!rect->w || !rect->h) { return 0; /* nothing to do. */ } if (texture->yuv) { return SDL_UpdateTextureYUVPlanar(texture, rect, Yplane, Ypitch, Uplane, Upitch, Vplane, Vpitch); } else { SDL_assert(!texture->native); renderer = texture->renderer; SDL_assert(renderer->UpdateTextureYUV); if (renderer->UpdateTextureYUV) { return renderer->UpdateTextureYUV(renderer, texture, rect, Yplane, Ypitch, Uplane, Upitch, Vplane, Vpitch); } else { return SDL_Unsupported(); } } } 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) { return SDL_SetError("SDL_LockTexture(): texture must be streaming"); } 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 = NULL; int native_pitch = 0; 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); } static void SDL_UnlockTextureNative(SDL_Texture * texture) { SDL_Texture *native = texture->native; void *native_pixels = NULL; int native_pitch = 0; 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); } } SDL_bool SDL_RenderTargetSupported(SDL_Renderer *renderer) { if (!renderer || !renderer->SetRenderTarget) { return SDL_FALSE; } return (renderer->info.flags & SDL_RENDERER_TARGETTEXTURE) != 0; } int SDL_SetRenderTarget(SDL_Renderer *renderer, SDL_Texture *texture) { if (!SDL_RenderTargetSupported(renderer)) { return SDL_Unsupported(); } if (texture == renderer->target) { /* Nothing to do! */ return 0; } /* texture == NULL is valid and means reset the target to the window */ if (texture) { CHECK_TEXTURE_MAGIC(texture, -1); if (renderer != texture->renderer) { return SDL_SetError("Texture was not created with this renderer"); } if (texture->access != SDL_TEXTUREACCESS_TARGET) { return SDL_SetError("Texture not created with SDL_TEXTUREACCESS_TARGET"); } if (texture->native) { /* Always render to the native texture */ texture = texture->native; } } SDL_LockMutex(renderer->target_mutex); if (texture && !renderer->target) { /* Make a backup of the viewport */ renderer->viewport_backup = renderer->viewport; renderer->clip_rect_backup = renderer->clip_rect; renderer->clipping_enabled_backup = renderer->clipping_enabled; renderer->scale_backup = renderer->scale; renderer->logical_w_backup = renderer->logical_w; renderer->logical_h_backup = renderer->logical_h; } renderer->target = texture; if (renderer->SetRenderTarget(renderer, texture) < 0) { SDL_UnlockMutex(renderer->target_mutex); return -1; } if (texture) { renderer->viewport.x = 0; renderer->viewport.y = 0; renderer->viewport.w = texture->w; renderer->viewport.h = texture->h; SDL_zero(renderer->clip_rect); renderer->clipping_enabled = SDL_FALSE; renderer->scale.x = 1.0f; renderer->scale.y = 1.0f; renderer->logical_w = texture->w; renderer->logical_h = texture->h; } else { renderer->viewport = renderer->viewport_backup; renderer->clip_rect = renderer->clip_rect_backup; renderer->clipping_enabled = renderer->clipping_enabled_backup; renderer->scale = renderer->scale_backup; renderer->logical_w = renderer->logical_w_backup; renderer->logical_h = renderer->logical_h_backup; } SDL_UnlockMutex(renderer->target_mutex); if (renderer->UpdateViewport(renderer) < 0) { return -1; } if (renderer->UpdateClipRect(renderer) < 0) { return -1; } /* All set! */ return 0; } SDL_Texture * SDL_GetRenderTarget(SDL_Renderer *renderer) { return renderer->target; } static int UpdateLogicalSize(SDL_Renderer *renderer) { int w = 1, h = 1; float want_aspect; float real_aspect; float scale; SDL_Rect viewport; /* 0 is for letterbox, 1 is for overscan */ int scale_policy = 0; const char *hint; if (!renderer->logical_w || !renderer->logical_h) { return 0; } if (SDL_GetRendererOutputSize(renderer, &w, &h) < 0) { return -1; } hint = SDL_GetHint(SDL_HINT_RENDER_LOGICAL_SIZE_MODE); if (hint && (*hint == '1' || SDL_strcasecmp(hint, "overscan") == 0)) { #if SDL_VIDEO_RENDER_D3D SDL_bool overscan_supported = SDL_TRUE; /* Unfortunately, Direct3D 9 doesn't support negative viewport numbers which the overscan implementation relies on. */ if (SDL_strcasecmp(SDL_GetCurrentVideoDriver(), "direct3d") == 0) { overscan_supported = SDL_FALSE; } if (overscan_supported) { scale_policy = 1; } #else scale_policy = 1; #endif } want_aspect = (float)renderer->logical_w / renderer->logical_h; real_aspect = (float)w / h; /* Clear the scale because we're setting viewport in output coordinates */ SDL_RenderSetScale(renderer, 1.0f, 1.0f); if (renderer->integer_scale) { if (want_aspect > real_aspect) { scale = (float)(w / renderer->logical_w); } else { scale = (float)(h / renderer->logical_h); } viewport.w = (int)SDL_ceil(renderer->logical_w * scale); viewport.x = (w - viewport.w) / 2; viewport.h = (int)SDL_ceil(renderer->logical_h * scale); viewport.y = (h - viewport.h) / 2; SDL_RenderSetViewport(renderer, &viewport); } else if (SDL_fabs(want_aspect-real_aspect) < 0.0001) { /* The aspect ratios are the same, just scale appropriately */ scale = (float)w / renderer->logical_w; SDL_RenderSetViewport(renderer, NULL); } else if (want_aspect > real_aspect) { if (scale_policy == 1) { /* We want a wider aspect ratio than is available - zoom so logical height matches the real height and the width will grow off the screen */ scale = (float)h / renderer->logical_h; viewport.y = 0; viewport.h = h; viewport.w = (int)SDL_ceil(renderer->logical_w * scale); viewport.x = (w - viewport.w) / 2; SDL_RenderSetViewport(renderer, &viewport); } else { /* We want a wider aspect ratio than is available - letterbox it */ scale = (float)w / renderer->logical_w; viewport.x = 0; viewport.w = w; viewport.h = (int)SDL_ceil(renderer->logical_h * scale); viewport.y = (h - viewport.h) / 2; SDL_RenderSetViewport(renderer, &viewport); } } else { if (scale_policy == 1) { /* We want a narrower aspect ratio than is available - zoom so logical width matches the real width and the height will grow off the screen */ scale = (float)w / renderer->logical_w; viewport.x = 0; viewport.w = w; viewport.h = (int)SDL_ceil(renderer->logical_h * scale); viewport.y = (h - viewport.h) / 2; SDL_RenderSetViewport(renderer, &viewport); } else { /* We want a narrower aspect ratio than is available - use side-bars */ scale = (float)h / renderer->logical_h; viewport.y = 0; viewport.h = h; viewport.w = (int)SDL_ceil(renderer->logical_w * scale); viewport.x = (w - viewport.w) / 2; SDL_RenderSetViewport(renderer, &viewport); } } /* Set the new scale */ SDL_RenderSetScale(renderer, scale, scale); return 0; } int SDL_RenderSetLogicalSize(SDL_Renderer * renderer, int w, int h) { CHECK_RENDERER_MAGIC(renderer, -1); if (!w || !h) { /* Clear any previous logical resolution */ renderer->logical_w = 0; renderer->logical_h = 0; SDL_RenderSetViewport(renderer, NULL); SDL_RenderSetScale(renderer, 1.0f, 1.0f); return 0; } renderer->logical_w = w; renderer->logical_h = h; return UpdateLogicalSize(renderer); } void SDL_RenderGetLogicalSize(SDL_Renderer * renderer, int *w, int *h) { CHECK_RENDERER_MAGIC(renderer, ); if (w) { *w = renderer->logical_w; } if (h) { *h = renderer->logical_h; } } int SDL_RenderSetIntegerScale(SDL_Renderer * renderer, SDL_bool enable) { CHECK_RENDERER_MAGIC(renderer, -1); renderer->integer_scale = enable; return UpdateLogicalSize(renderer); } SDL_bool SDLCALL SDL_RenderGetIntegerScale(SDL_Renderer * renderer) { CHECK_RENDERER_MAGIC(renderer, SDL_FALSE); return renderer->integer_scale; } int SDL_RenderSetViewport(SDL_Renderer * renderer, const SDL_Rect * rect) { CHECK_RENDERER_MAGIC(renderer, -1); if (rect) { renderer->viewport.x = (int)SDL_floor(rect->x * renderer->scale.x); renderer->viewport.y = (int)SDL_floor(rect->y * renderer->scale.y); renderer->viewport.w = (int)SDL_ceil(rect->w * renderer->scale.x); renderer->viewport.h = (int)SDL_ceil(rect->h * renderer->scale.y); } else { renderer->viewport.x = 0; renderer->viewport.y = 0; if (SDL_GetRendererOutputSize(renderer, &renderer->viewport.w, &renderer->viewport.h) < 0) { return -1; } } return renderer->UpdateViewport(renderer); } void SDL_RenderGetViewport(SDL_Renderer * renderer, SDL_Rect * rect) { CHECK_RENDERER_MAGIC(renderer, ); if (rect) { rect->x = (int)(renderer->viewport.x / renderer->scale.x); rect->y = (int)(renderer->viewport.y / renderer->scale.y); rect->w = (int)(renderer->viewport.w / renderer->scale.x); rect->h = (int)(renderer->viewport.h / renderer->scale.y); } } int SDL_RenderSetClipRect(SDL_Renderer * renderer, const SDL_Rect * rect) { CHECK_RENDERER_MAGIC(renderer, -1) if (rect) { renderer->clipping_enabled = SDL_TRUE; renderer->clip_rect.x = (int)SDL_floor(rect->x * renderer->scale.x); renderer->clip_rect.y = (int)SDL_floor(rect->y * renderer->scale.y); renderer->clip_rect.w = (int)SDL_ceil(rect->w * renderer->scale.x); renderer->clip_rect.h = (int)SDL_ceil(rect->h * renderer->scale.y); } else { renderer->clipping_enabled = SDL_FALSE; SDL_zero(renderer->clip_rect); } return renderer->UpdateClipRect(renderer); } void SDL_RenderGetClipRect(SDL_Renderer * renderer, SDL_Rect * rect) { CHECK_RENDERER_MAGIC(renderer, ) if (rect) { rect->x = (int)(renderer->clip_rect.x / renderer->scale.x); rect->y = (int)(renderer->clip_rect.y / renderer->scale.y); rect->w = (int)(renderer->clip_rect.w / renderer->scale.x); rect->h = (int)(renderer->clip_rect.h / renderer->scale.y); } } SDL_bool SDL_RenderIsClipEnabled(SDL_Renderer * renderer) { CHECK_RENDERER_MAGIC(renderer, SDL_FALSE) return renderer->clipping_enabled; } int SDL_RenderSetScale(SDL_Renderer * renderer, float scaleX, float scaleY) { CHECK_RENDERER_MAGIC(renderer, -1); renderer->scale.x = scaleX; renderer->scale.y = scaleY; return 0; } void SDL_RenderGetScale(SDL_Renderer * renderer, float *scaleX, float *scaleY) { CHECK_RENDERER_MAGIC(renderer, ); if (scaleX) { *scaleX = renderer->scale.x; } if (scaleY) { *scaleY = renderer->scale.y; } } 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); if (!IsSupportedBlendMode(renderer, blendMode)) { return SDL_Unsupported(); } 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); /* Don't draw while we're hidden */ if (renderer->hidden) { return 0; } 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); } static int RenderDrawPointsWithRects(SDL_Renderer * renderer, const SDL_Point * points, int count) { SDL_FRect *frects; int i; int status; frects = SDL_stack_alloc(SDL_FRect, count); if (!frects) { return SDL_OutOfMemory(); } for (i = 0; i < count; ++i) { frects[i].x = points[i].x * renderer->scale.x; frects[i].y = points[i].y * renderer->scale.y; frects[i].w = renderer->scale.x; frects[i].h = renderer->scale.y; } status = renderer->RenderFillRects(renderer, frects, count); SDL_stack_free(frects); return status; } int SDL_RenderDrawPoints(SDL_Renderer * renderer, const SDL_Point * points, int count) { SDL_FPoint *fpoints; int i; int status; CHECK_RENDERER_MAGIC(renderer, -1); if (!points) { return SDL_SetError("SDL_RenderDrawPoints(): Passed NULL points"); } if (count < 1) { return 0; } /* Don't draw while we're hidden */ if (renderer->hidden) { return 0; } if (renderer->scale.x != 1.0f || renderer->scale.y != 1.0f) { return RenderDrawPointsWithRects(renderer, points, count); } fpoints = SDL_stack_alloc(SDL_FPoint, count); if (!fpoints) { return SDL_OutOfMemory(); } for (i = 0; i < count; ++i) { fpoints[i].x = points[i].x * renderer->scale.x; fpoints[i].y = points[i].y * renderer->scale.y; } status = renderer->RenderDrawPoints(renderer, fpoints, count); SDL_stack_free(fpoints); return status; } 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); } static int RenderDrawLinesWithRects(SDL_Renderer * renderer, const SDL_Point * points, int count) { SDL_FRect *frect; SDL_FRect *frects; SDL_FPoint fpoints[2]; int i, nrects; int status; frects = SDL_stack_alloc(SDL_FRect, count-1); if (!frects) { return SDL_OutOfMemory(); } status = 0; nrects = 0; for (i = 0; i < count-1; ++i) { if (points[i].x == points[i+1].x) { int minY = SDL_min(points[i].y, points[i+1].y); int maxY = SDL_max(points[i].y, points[i+1].y); frect = &frects[nrects++]; frect->x = points[i].x * renderer->scale.x; frect->y = minY * renderer->scale.y; frect->w = renderer->scale.x; frect->h = (maxY - minY + 1) * renderer->scale.y; } else if (points[i].y == points[i+1].y) { int minX = SDL_min(points[i].x, points[i+1].x); int maxX = SDL_max(points[i].x, points[i+1].x); frect = &frects[nrects++]; frect->x = minX * renderer->scale.x; frect->y = points[i].y * renderer->scale.y; frect->w = (maxX - minX + 1) * renderer->scale.x; frect->h = renderer->scale.y; } else { /* FIXME: We can't use a rect for this line... */ fpoints[0].x = points[i].x * renderer->scale.x; fpoints[0].y = points[i].y * renderer->scale.y; fpoints[1].x = points[i+1].x * renderer->scale.x; fpoints[1].y = points[i+1].y * renderer->scale.y; status += renderer->RenderDrawLines(renderer, fpoints, 2); } } status += renderer->RenderFillRects(renderer, frects, nrects); SDL_stack_free(frects); if (status < 0) { status = -1; } return status; } int SDL_RenderDrawLines(SDL_Renderer * renderer, const SDL_Point * points, int count) { SDL_FPoint *fpoints; int i; int status; CHECK_RENDERER_MAGIC(renderer, -1); if (!points) { return SDL_SetError("SDL_RenderDrawLines(): Passed NULL points"); } if (count < 2) { return 0; } /* Don't draw while we're hidden */ if (renderer->hidden) { return 0; } if (renderer->scale.x != 1.0f || renderer->scale.y != 1.0f) { return RenderDrawLinesWithRects(renderer, points, count); } fpoints = SDL_stack_alloc(SDL_FPoint, count); if (!fpoints) { return SDL_OutOfMemory(); } for (i = 0; i < count; ++i) { fpoints[i].x = points[i].x * renderer->scale.x; fpoints[i].y = points[i].y * renderer->scale.y; } status = renderer->RenderDrawLines(renderer, fpoints, count); SDL_stack_free(fpoints); return status; } 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) { SDL_RenderGetViewport(renderer, &full_rect); full_rect.x = 0; full_rect.y = 0; 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) { return SDL_SetError("SDL_RenderDrawRects(): Passed NULL rects"); } if (count < 1) { return 0; } /* Don't draw while we're hidden */ if (renderer->hidden) { 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 = { 0, 0, 0, 0 }; CHECK_RENDERER_MAGIC(renderer, -1); /* If 'rect' == NULL, then outline the whole surface */ if (!rect) { SDL_RenderGetViewport(renderer, &full_rect); full_rect.x = 0; full_rect.y = 0; rect = &full_rect; } return SDL_RenderFillRects(renderer, rect, 1); } int SDL_RenderFillRects(SDL_Renderer * renderer, const SDL_Rect * rects, int count) { SDL_FRect *frects; int i; int status; CHECK_RENDERER_MAGIC(renderer, -1); if (!rects) { return SDL_SetError("SDL_RenderFillRects(): Passed NULL rects"); } if (count < 1) { return 0; } /* Don't draw while we're hidden */ if (renderer->hidden) { return 0; } frects = SDL_stack_alloc(SDL_FRect, count); if (!frects) { return SDL_OutOfMemory(); } for (i = 0; i < count; ++i) { frects[i].x = rects[i].x * renderer->scale.x; frects[i].y = rects[i].y * renderer->scale.y; frects[i].w = rects[i].w * renderer->scale.x; frects[i].h = rects[i].h * renderer->scale.y; } status = renderer->RenderFillRects(renderer, frects, count); SDL_stack_free(frects); return status; } int SDL_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture, const SDL_Rect * srcrect, const SDL_Rect * dstrect) { SDL_Rect real_srcrect = { 0, 0, 0, 0 }; SDL_Rect real_dstrect = { 0, 0, 0, 0 }; SDL_FRect frect; CHECK_RENDERER_MAGIC(renderer, -1); CHECK_TEXTURE_MAGIC(texture, -1); if (renderer != texture->renderer) { return SDL_SetError("Texture was not created with this renderer"); } /* Don't draw while we're hidden */ if (renderer->hidden) { return 0; } 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; } } SDL_RenderGetViewport(renderer, &real_dstrect); real_dstrect.x = 0; real_dstrect.y = 0; if (dstrect) { if (!SDL_HasIntersection(dstrect, &real_dstrect)) { return 0; } real_dstrect = *dstrect; } if (texture->native) { texture = texture->native; } frect.x = real_dstrect.x * renderer->scale.x; frect.y = real_dstrect.y * renderer->scale.y; frect.w = real_dstrect.w * renderer->scale.x; frect.h = real_dstrect.h * renderer->scale.y; return renderer->RenderCopy(renderer, texture, &real_srcrect, &frect); } int SDL_RenderCopyEx(SDL_Renderer * renderer, SDL_Texture * texture, const SDL_Rect * srcrect, const SDL_Rect * dstrect, const double angle, const SDL_Point *center, const SDL_RendererFlip flip) { SDL_Rect real_srcrect = { 0, 0, 0, 0 }; SDL_Rect real_dstrect = { 0, 0, 0, 0 }; SDL_Point real_center; SDL_FRect frect; SDL_FPoint fcenter; if (flip == SDL_FLIP_NONE && (int)(angle/360) == angle/360) { /* fast path when we don't need rotation or flipping */ return SDL_RenderCopy(renderer, texture, srcrect, dstrect); } CHECK_RENDERER_MAGIC(renderer, -1); CHECK_TEXTURE_MAGIC(texture, -1); if (renderer != texture->renderer) { return SDL_SetError("Texture was not created with this renderer"); } if (!renderer->RenderCopyEx) { return SDL_SetError("Renderer does not support RenderCopyEx"); } /* Don't draw while we're hidden */ if (renderer->hidden) { return 0; } 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; } } /* We don't intersect the dstrect with the viewport as RenderCopy does because of potential rotation clipping issues... TODO: should we? */ if (dstrect) { real_dstrect = *dstrect; } else { SDL_RenderGetViewport(renderer, &real_dstrect); real_dstrect.x = 0; real_dstrect.y = 0; } if (texture->native) { texture = texture->native; } if (center) { real_center = *center; } else { real_center.x = real_dstrect.w/2; real_center.y = real_dstrect.h/2; } frect.x = real_dstrect.x * renderer->scale.x; frect.y = real_dstrect.y * renderer->scale.y; frect.w = real_dstrect.w * renderer->scale.x; frect.h = real_dstrect.h * renderer->scale.y; fcenter.x = real_center.x * renderer->scale.x; fcenter.y = real_center.y * renderer->scale.y; return renderer->RenderCopyEx(renderer, texture, &real_srcrect, &frect, angle, &fcenter, flip); } int SDL_RenderReadPixels(SDL_Renderer * renderer, const SDL_Rect * rect, Uint32 format, void * pixels, int pitch) { SDL_Rect real_rect; CHECK_RENDERER_MAGIC(renderer, -1); if (!renderer->RenderReadPixels) { return SDL_Unsupported(); } if (!format) { format = SDL_GetWindowPixelFormat(renderer->window); } real_rect.x = renderer->viewport.x; real_rect.y = renderer->viewport.y; 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(format); 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, ); /* Don't draw while we're hidden */ if (renderer->hidden) { return; } renderer->RenderPresent(renderer); } void SDL_DestroyTexture(SDL_Texture * texture) { SDL_Renderer *renderer; CHECK_TEXTURE_MAGIC(texture, ); renderer = texture->renderer; if (texture == renderer->target) { SDL_SetRenderTarget(renderer, NULL); } texture->magic = NULL; 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); } 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_Texture *tex = renderer->textures; (void) tex; SDL_DestroyTexture(renderer->textures); SDL_assert(tex != renderer->textures); /* satisfy static analysis. */ } if (renderer->window) { SDL_SetWindowData(renderer->window, SDL_WINDOWRENDERDATA, NULL); } /* It's no longer magical... */ renderer->magic = NULL; /* Free the target mutex */ SDL_DestroyMutex(renderer->target_mutex); renderer->target_mutex = NULL; /* Free the renderer instance */ renderer->DestroyRenderer(renderer); } int SDL_GL_BindTexture(SDL_Texture *texture, float *texw, float *texh) { SDL_Renderer *renderer; CHECK_TEXTURE_MAGIC(texture, -1); renderer = texture->renderer; if (texture->native) { return SDL_GL_BindTexture(texture->native, texw, texh); } else if (renderer && renderer->GL_BindTexture) { return renderer->GL_BindTexture(renderer, texture, texw, texh); } else { return SDL_Unsupported(); } } int SDL_GL_UnbindTexture(SDL_Texture *texture) { SDL_Renderer *renderer; CHECK_TEXTURE_MAGIC(texture, -1); renderer = texture->renderer; if (texture->native) { return SDL_GL_UnbindTexture(texture->native); } else if (renderer && renderer->GL_UnbindTexture) { return renderer->GL_UnbindTexture(renderer, texture); } return SDL_Unsupported(); } void * SDL_RenderGetMetalLayer(SDL_Renderer * renderer) { CHECK_RENDERER_MAGIC(renderer, NULL); if (renderer->GetMetalLayer) { return renderer->GetMetalLayer(renderer); } return NULL; } void * SDL_RenderGetMetalCommandEncoder(SDL_Renderer * renderer) { CHECK_RENDERER_MAGIC(renderer, NULL); if (renderer->GetMetalCommandEncoder) { return renderer->GetMetalCommandEncoder(renderer); } return NULL; } static SDL_BlendMode SDL_GetShortBlendMode(SDL_BlendMode blendMode) { if (blendMode == SDL_BLENDMODE_NONE_FULL) { return SDL_BLENDMODE_NONE; } if (blendMode == SDL_BLENDMODE_BLEND_FULL) { return SDL_BLENDMODE_BLEND; } if (blendMode == SDL_BLENDMODE_ADD_FULL) { return SDL_BLENDMODE_ADD; } if (blendMode == SDL_BLENDMODE_MOD_FULL) { return SDL_BLENDMODE_MOD; } return blendMode; } static SDL_BlendMode SDL_GetLongBlendMode(SDL_BlendMode blendMode) { if (blendMode == SDL_BLENDMODE_NONE) { return SDL_BLENDMODE_NONE_FULL; } if (blendMode == SDL_BLENDMODE_BLEND) { return SDL_BLENDMODE_BLEND_FULL; } if (blendMode == SDL_BLENDMODE_ADD) { return SDL_BLENDMODE_ADD_FULL; } if (blendMode == SDL_BLENDMODE_MOD) { return SDL_BLENDMODE_MOD_FULL; } return blendMode; } SDL_BlendMode SDL_ComposeCustomBlendMode(SDL_BlendFactor srcColorFactor, SDL_BlendFactor dstColorFactor, SDL_BlendOperation colorOperation, SDL_BlendFactor srcAlphaFactor, SDL_BlendFactor dstAlphaFactor, SDL_BlendOperation alphaOperation) { SDL_BlendMode blendMode = SDL_COMPOSE_BLENDMODE(srcColorFactor, dstColorFactor, colorOperation, srcAlphaFactor, dstAlphaFactor, alphaOperation); return SDL_GetShortBlendMode(blendMode); } SDL_BlendFactor SDL_GetBlendModeSrcColorFactor(SDL_BlendMode blendMode) { blendMode = SDL_GetLongBlendMode(blendMode); return (SDL_BlendFactor)(((Uint32)blendMode >> 4) & 0xF); } SDL_BlendFactor SDL_GetBlendModeDstColorFactor(SDL_BlendMode blendMode) { blendMode = SDL_GetLongBlendMode(blendMode); return (SDL_BlendFactor)(((Uint32)blendMode >> 8) & 0xF); } SDL_BlendOperation SDL_GetBlendModeColorOperation(SDL_BlendMode blendMode) { blendMode = SDL_GetLongBlendMode(blendMode); return (SDL_BlendOperation)(((Uint32)blendMode >> 0) & 0xF); } SDL_BlendFactor SDL_GetBlendModeSrcAlphaFactor(SDL_BlendMode blendMode) { blendMode = SDL_GetLongBlendMode(blendMode); return (SDL_BlendFactor)(((Uint32)blendMode >> 20) & 0xF); } SDL_BlendFactor SDL_GetBlendModeDstAlphaFactor(SDL_BlendMode blendMode) { blendMode = SDL_GetLongBlendMode(blendMode); return (SDL_BlendFactor)(((Uint32)blendMode >> 24) & 0xF); } SDL_BlendOperation SDL_GetBlendModeAlphaOperation(SDL_BlendMode blendMode) { blendMode = SDL_GetLongBlendMode(blendMode); return (SDL_BlendOperation)(((Uint32)blendMode >> 16) & 0xF); } /* vi: set ts=4 sw=4 expandtab: */