From 9fedff997ba80eeb568e6b8891803d149ccc95ae Mon Sep 17 00:00:00 2001 From: "Ryan C. Gordon" Date: Wed, 3 Oct 2018 23:37:29 -0400 Subject: [PATCH] render: moved software renderer to new interface. --- src/render/software/SDL_render_sw.c | 727 +++++++++++++--------------- 1 file changed, 348 insertions(+), 379 deletions(-) diff --git a/src/render/software/SDL_render_sw.c b/src/render/software/SDL_render_sw.c index 0c14cac5adcbb..807391abe836e 100644 --- a/src/render/software/SDL_render_sw.c +++ b/src/render/software/SDL_render_sw.c @@ -25,6 +25,7 @@ #include "../SDL_sysrender.h" #include "SDL_render_sw_c.h" #include "SDL_hints.h" +#include "SDL_assert.h" #include "SDL_draw.h" #include "SDL_blendfillrect.h" @@ -36,65 +37,6 @@ /* 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; @@ -114,82 +56,11 @@ SW_ActivateRenderer(SDL_Renderer * renderer) 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) { @@ -252,46 +123,6 @@ SW_CreateTexture(SDL_Renderer * renderer, SDL_Texture * texture) 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) @@ -350,251 +181,149 @@ SW_SetRenderTarget(SDL_Renderer * renderer, SDL_Texture * texture) } static int -SW_UpdateViewport(SDL_Renderer * renderer) +SW_QueueSetViewport(SDL_Renderer * renderer, SDL_RenderCommand *cmd) { - 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; + return 0; /* nothing to do in this backend. */ } static int -SW_RenderClear(SDL_Renderer * renderer) +SW_QueueDrawPoints(SDL_Renderer * renderer, SDL_RenderCommand *cmd, const SDL_FPoint * points, int count) { - SDL_Surface *surface = SW_ActivateRenderer(renderer); - Uint32 color; - SDL_Rect clip_rect; + SDL_Point *verts = (SDL_Point *) SDL_AllocateRenderVertices(renderer, count * sizeof (SDL_Point), 0, &cmd->data.draw.first); + size_t i; - if (!surface) { + if (!verts) { 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; - } + cmd->data.draw.count = count; - 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); + const int x = renderer->viewport.x; + const int y = renderer->viewport.y; + for (i = 0; i < count; i++, verts++, points++) { + verts->x = (int)(x + points->x); + verts->y = (int)(y + points->y); } } else { - for (i = 0; i < count; ++i) { - final_points[i].x = (int)points[i].x; - final_points[i].y = (int)points[i].y; + for (i = 0; i < count; i++, verts++, points++) { + verts->x = (int)points->x; + verts->y = (int)points->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; + return 0; } static int -SW_RenderDrawLines(SDL_Renderer * renderer, const SDL_FPoint * points, - int count) +SW_QueueFillRects(SDL_Renderer * renderer, SDL_RenderCommand *cmd, const SDL_FRect * rects, int count) { - SDL_Surface *surface = SW_ActivateRenderer(renderer); - SDL_Point *final_points; - int i, status; + SDL_Rect *verts = (SDL_Rect *) SDL_AllocateRenderVertices(renderer, count * sizeof (SDL_Rect), 0, &cmd->data.draw.first); + size_t i; - if (!surface) { + if (!verts) { 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; + cmd->data.draw.count = count; - for (i = 0; i < count; ++i) { - final_points[i].x = (int)(x + points[i].x); - final_points[i].y = (int)(y + points[i].y); + if (renderer->viewport.x || renderer->viewport.y) { + const int x = renderer->viewport.x; + const int y = renderer->viewport.y; + + for (i = 0; i < count; i++, verts++, rects++) { + verts->x = (int)(x + rects->x); + verts->y = (int)(y + rects->y); + verts->w = SDL_max((int)rects->w, 1); + verts->h = SDL_max((int)rects->h, 1); } } else { - for (i = 0; i < count; ++i) { - final_points[i].x = (int)points[i].x; - final_points[i].y = (int)points[i].y; + for (i = 0; i < count; i++, verts++, rects++) { + verts->x = (int)rects->x; + verts->y = (int)rects->y; + verts->w = SDL_max((int)rects->w, 1); + verts->h = SDL_max((int)rects->h, 1); } } - /* 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; + return 0; } static int -SW_RenderFillRects(SDL_Renderer * renderer, const SDL_FRect * rects, int count) +SW_QueueCopy(SDL_Renderer * renderer, SDL_RenderCommand *cmd, SDL_Texture * texture, + const SDL_Rect * srcrect, const SDL_FRect * dstrect) { - SDL_Surface *surface = SW_ActivateRenderer(renderer); - SDL_Rect *final_rects; - int i, status; + SDL_Rect *verts = (SDL_Rect *) SDL_AllocateRenderVertices(renderer, 2 * sizeof (SDL_Rect), 0, &cmd->data.draw.first); - if (!surface) { + if (!verts) { 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); - } - } + cmd->data.draw.count = 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); + SDL_memcpy(verts, srcrect, sizeof (SDL_Rect)); + verts++; + + if (renderer->viewport.x || renderer->viewport.y) { + verts->x = (int)(renderer->viewport.x + dstrect->x); + verts->y = (int)(renderer->viewport.y + dstrect->y); } else { - status = SDL_BlendFillRects(surface, final_rects, count, - renderer->blendMode, - renderer->r, renderer->g, renderer->b, - renderer->a); + verts->x = (int)dstrect->x; + verts->y = (int)dstrect->y; } - SDL_stack_free(final_rects); + verts->w = (int)dstrect->w; + verts->h = (int)dstrect->h; - return status; + return 0; } +typedef struct CopyExData +{ + SDL_Rect srcrect; + SDL_Rect dstrect; + double angle; + SDL_FPoint center; + SDL_RendererFlip flip; +} CopyExData; + static int -SW_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture, - const SDL_Rect * srcrect, const SDL_FRect * dstrect) +SW_QueueCopyEx(SDL_Renderer * renderer, SDL_RenderCommand *cmd, 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; + CopyExData *verts = (CopyExData *) SDL_AllocateRenderVertices(renderer, sizeof (CopyExData), 0, &cmd->data.draw.first); - if (!surface) { + if (!verts) { return -1; } + cmd->data.draw.count = 1; + + SDL_memcpy(&verts->srcrect, srcrect, sizeof (SDL_Rect)); + 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); + verts->dstrect.x = (int)(renderer->viewport.x + dstrect->x); + verts->dstrect.y = (int)(renderer->viewport.y + dstrect->y); } else { - final_rect.x = (int)dstrect->x; - final_rect.y = (int)dstrect->y; + verts->dstrect.x = (int)dstrect->x; + verts->dstrect.y = (int)dstrect->y; } - final_rect.w = (int)dstrect->w; - final_rect.h = (int)dstrect->h; + verts->dstrect.w = (int)dstrect->w; + verts->dstrect.h = (int)dstrect->h; + verts->angle = angle; + SDL_memcpy(&verts->center, center, sizeof (SDL_FPoint)); + verts->flip = flip; - 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); - } + return 0; } static int -SW_RenderCopyEx(SDL_Renderer * renderer, SDL_Texture * texture, - const SDL_Rect * srcrect, const SDL_FRect * dstrect, +SW_RenderCopyEx(SDL_Renderer * renderer, SDL_Surface *surface, SDL_Texture * texture, + const SDL_Rect * srcrect, const SDL_Rect * final_rect, 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_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; @@ -609,19 +338,10 @@ SW_RenderCopyEx(SDL_Renderer * renderer, SDL_Texture * texture, 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; + tmp_rect.w = final_rect->w; + tmp_rect.h = final_rect->h; /* 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. @@ -653,7 +373,7 @@ SW_RenderCopyEx(SDL_Renderer * renderer, SDL_Texture * texture, } /* 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)) { + if (!(srcrect->w == final_rect->w && srcrect->h == final_rect->h && srcrect->x == 0 && srcrect->y == 0)) { blitRequired = SDL_TRUE; } @@ -673,7 +393,7 @@ SW_RenderCopyEx(SDL_Renderer * renderer, SDL_Texture * texture, * 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, + mask = SDL_CreateRGBSurface(0, final_rect->w, final_rect->h, 32, 0x00ff0000, 0x0000ff00, 0x000000ff, 0xff000000); if (mask == NULL) { retval = -1; @@ -687,7 +407,7 @@ SW_RenderCopyEx(SDL_Renderer * renderer, SDL_Texture * texture, */ if (!retval && (blitRequired || applyModulation)) { SDL_Rect scale_rect = tmp_rect; - src_scaled = SDL_CreateRGBSurface(0, final_rect.w, final_rect.h, 32, + src_scaled = SDL_CreateRGBSurface(0, final_rect->w, final_rect->h, 32, 0x00ff0000, 0x0000ff00, 0x000000ff, 0xff000000); if (src_scaled == NULL) { retval = -1; @@ -718,32 +438,32 @@ SW_RenderCopyEx(SDL_Renderer * renderer, SDL_Texture * texture, } 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; + 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; + 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; + 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; + 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; + 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; @@ -819,6 +539,170 @@ SW_RenderCopyEx(SDL_Renderer * renderer, SDL_Texture * texture, return retval; } +static void +PrepTextureForCopy(const SDL_RenderCommand *cmd) +{ + const Uint8 r = cmd->data.draw.r; + const Uint8 g = cmd->data.draw.g; + const Uint8 b = cmd->data.draw.b; + const Uint8 a = cmd->data.draw.a; + const SDL_BlendMode blend = cmd->data.draw.blend; + SDL_Texture *texture = cmd->data.draw.texture; + SDL_Surface *surface = (SDL_Surface *) texture->driverdata; + + if (texture->modMode & SDL_TEXTUREMODULATE_COLOR) { + SDL_SetSurfaceRLE(surface, 0); + SDL_SetSurfaceColorMod(surface, r, g, b); + } + + if ((texture->modMode & SDL_TEXTUREMODULATE_ALPHA) && surface->format->Amask) { + SDL_SetSurfaceRLE(surface, 0); + SDL_SetSurfaceAlphaMod(surface, a); + } + + if ((blend == SDL_BLENDMODE_ADD) || (blend == SDL_BLENDMODE_MOD)) { + SDL_SetSurfaceRLE(surface, 0); + } + SDL_SetSurfaceBlendMode(surface, blend); +} + +static int +SW_RunCommandQueue(SDL_Renderer * renderer, SDL_RenderCommand *cmd, void *vertices, size_t vertsize) +{ + SW_RenderData *data = (SW_RenderData *) renderer->driverdata; + SDL_Surface *surface = SW_ActivateRenderer(renderer); + const SDL_Rect *viewport = NULL; + const SDL_Rect *cliprect = NULL; + + if (!surface) { + return -1; + } + + while (cmd) { + switch (cmd->command) { + case SDL_RENDERCMD_SETDRAWCOLOR: { + break; /* Not used in this backend. */ + } + + case SDL_RENDERCMD_SETVIEWPORT: { + viewport = &cmd->data.viewport.rect; + SDL_SetClipRect(data->surface, viewport); + break; + } + + case SDL_RENDERCMD_SETCLIPRECT: { + SDL_assert(viewport != NULL); + cliprect = cmd->data.cliprect.enabled ? &cmd->data.cliprect.rect : NULL; + if (cliprect) { + SDL_Rect clip_rect = { cliprect->x + viewport->x, cliprect->y + viewport->y, cliprect->w, cliprect->h }; + SDL_IntersectRect(viewport, &clip_rect, &clip_rect); + SDL_SetClipRect(surface, &clip_rect); + } else { + SDL_SetClipRect(surface, viewport); + } + break; + } + + case SDL_RENDERCMD_CLEAR: { + const Uint8 r = cmd->data.color.r; + const Uint8 g = cmd->data.color.g; + const Uint8 b = cmd->data.color.b; + const Uint8 a = cmd->data.color.a; + const SDL_Rect clip_rect = surface->clip_rect; + /* By definition the clear ignores the clip rect */ + SDL_SetClipRect(surface, NULL); + SDL_FillRect(surface, NULL, SDL_MapRGBA(surface->format, r, g, b, a)); + SDL_SetClipRect(surface, &clip_rect); + break; + } + + case SDL_RENDERCMD_DRAW_POINTS: { + const Uint8 r = cmd->data.draw.r; + const Uint8 g = cmd->data.draw.g; + const Uint8 b = cmd->data.draw.b; + const Uint8 a = cmd->data.draw.a; + const size_t count = cmd->data.draw.count; + const SDL_Point *verts = (SDL_Point *) (((Uint8 *) vertices) + cmd->data.draw.first); + const SDL_BlendMode blend = cmd->data.draw.blend; + if (blend == SDL_BLENDMODE_NONE) { + SDL_DrawPoints(surface, verts, count, SDL_MapRGBA(surface->format, r, g, b, a)); + } else { + SDL_BlendPoints(surface, verts, count, blend, r, g, b, a); + } + break; + } + + case SDL_RENDERCMD_DRAW_LINES: { + const Uint8 r = cmd->data.draw.r; + const Uint8 g = cmd->data.draw.g; + const Uint8 b = cmd->data.draw.b; + const Uint8 a = cmd->data.draw.a; + const size_t count = cmd->data.draw.count; + const SDL_Point *verts = (SDL_Point *) (((Uint8 *) vertices) + cmd->data.draw.first); + const SDL_BlendMode blend = cmd->data.draw.blend; + if (blend == SDL_BLENDMODE_NONE) { + SDL_DrawLines(surface, verts, count, SDL_MapRGBA(surface->format, r, g, b, a)); + } else { + SDL_BlendLines(surface, verts, count, blend, r, g, b, a); + } + break; + } + + case SDL_RENDERCMD_FILL_RECTS: { + const Uint8 r = cmd->data.draw.r; + const Uint8 g = cmd->data.draw.g; + const Uint8 b = cmd->data.draw.b; + const Uint8 a = cmd->data.draw.a; + const size_t count = cmd->data.draw.count; + const SDL_Rect *verts = (SDL_Rect *) (((Uint8 *) vertices) + cmd->data.draw.first); + const SDL_BlendMode blend = cmd->data.draw.blend; + if (blend == SDL_BLENDMODE_NONE) { + SDL_FillRects(surface, verts, count, SDL_MapRGBA(surface->format, r, g, b, a)); + } else { + SDL_BlendFillRects(surface, verts, count, blend, r, g, b, a); + } + break; + } + + case SDL_RENDERCMD_COPY: { + SDL_Rect *verts = (SDL_Rect *) (((Uint8 *) vertices) + cmd->data.draw.first); + const SDL_Rect *srcrect = verts; + SDL_Rect *dstrect = verts + 1; + SDL_Texture *texture = cmd->data.draw.texture; + SDL_Surface *src = (SDL_Surface *) texture->driverdata; + + PrepTextureForCopy(cmd); + + if ( srcrect->w == dstrect->w && srcrect->h == dstrect->h ) { + SDL_BlitSurface(src, srcrect, surface, dstrect); + } 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); + SDL_BlitScaled(src, srcrect, surface, dstrect); + } + break; + } + + case SDL_RENDERCMD_COPY_EX: { + const CopyExData *copydata = (CopyExData *) (((Uint8 *) vertices) + cmd->data.draw.first); + PrepTextureForCopy(cmd); + SW_RenderCopyEx(renderer, surface, cmd->data.draw.texture, ©data->srcrect, + ©data->dstrect, copydata->angle, ©data->center, copydata->flip); + break; + } + + case SDL_RENDERCMD_NO_OP: + break; + } + + cmd = cmd->next; + } + + return 0; +} + static int SW_RenderReadPixels(SDL_Renderer * renderer, const SDL_Rect * rect, Uint32 format, void * pixels, int pitch) @@ -877,6 +761,91 @@ SW_DestroyRenderer(SDL_Renderer * renderer) SDL_free(renderer); } +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->UpdateTexture = SW_UpdateTexture; + renderer->LockTexture = SW_LockTexture; + renderer->UnlockTexture = SW_UnlockTexture; + renderer->SetRenderTarget = SW_SetRenderTarget; + renderer->QueueSetViewport = SW_QueueSetViewport; + renderer->QueueSetDrawColor = SW_QueueSetViewport; /* SetViewport and SetDrawColor are (currently) no-ops. */ + renderer->QueueDrawPoints = SW_QueueDrawPoints; + renderer->QueueDrawLines = SW_QueueDrawPoints; /* lines and points queue vertices the same way. */ + renderer->QueueFillRects = SW_QueueFillRects; + renderer->QueueCopy = SW_QueueCopy; + renderer->QueueCopyEx = SW_QueueCopyEx; + renderer->RunCommandQueue = SW_RunCommandQueue; + 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); +} + +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} +}; + #endif /* !SDL_RENDER_DISABLED */ /* vi: set ts=4 sw=4 expandtab: */