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view src/video/dummy/SDL_nullrender.c @ 4425:a3e71b957215

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Fixed bug #961 Kalle Olavi Niemitalo 2010-02-28 09:15:50 PST It seems the SDLK_LMETA and SDLK_RMETA constants have been removed from SDL 1.3. I grepped for them in the SDL source tree and these were the only hits: ./include/SDL_compat.h:230:#define SDLK_LSUPER SDLK_LMETA ./include/SDL_compat.h:231:#define SDLK_RSUPER SDLK_RMETA ./src/video/bwindow/SDL_BWin.h:194: keymap[0x66] = SDLK_LMETA; ./src/video/bwindow/SDL_BWin.h:195: keymap[0x67] = SDLK_RMETA; I don't know how compatible SDL 1.3 is supposed to be with applications designed for SDL 1.2. However, as you can see, SDL itself is still trying to use the removed constants, and that is clearly a bug. Because SDL_compat.h defines KMOD_LMETA as KMOD_LGUI, I suppose it should also define SDLK_LMETA as SDLK_LGUI, and SDLK_RMETA likewise.
author Sam Lantinga <slouken@libsdl.org>
date Tue, 09 Mar 2010 06:07:48 +0000
parents f7b03b6838cb
children e743b9c3f6d6
line wrap: on
line source

/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2010 Sam Lantinga

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    Sam Lantinga
    slouken@libsdl.org
*/
#include "SDL_config.h"

#include "SDL_video.h"
#include "../SDL_sysvideo.h"
#include "../SDL_yuv_sw_c.h"
#include "../SDL_renderer_sw.h"


/* SDL surface based renderer implementation */

static SDL_Renderer *SDL_DUMMY_CreateRenderer(SDL_Window * window,
                                              Uint32 flags);
static int SDL_DUMMY_RenderDrawPoints(SDL_Renderer * renderer,
                                      const SDL_Point * points, int count);
static int SDL_DUMMY_RenderDrawLines(SDL_Renderer * renderer,
                                     const SDL_Point * points, int count);
static int SDL_DUMMY_RenderDrawRects(SDL_Renderer * renderer,
                                     const SDL_Rect ** rects, int count);
static int SDL_DUMMY_RenderFillRects(SDL_Renderer * renderer,
                                     const SDL_Rect ** rects, int count);
static int SDL_DUMMY_RenderCopy(SDL_Renderer * renderer,
                                SDL_Texture * texture,
                                const SDL_Rect * srcrect,
                                const SDL_Rect * dstrect);
static int SDL_DUMMY_RenderReadPixels(SDL_Renderer * renderer,
                                      const SDL_Rect * rect,
                                      Uint32 format,
                                      void * pixels, int pitch);
static int SDL_DUMMY_RenderWritePixels(SDL_Renderer * renderer,
                                       const SDL_Rect * rect,
                                       Uint32 format,
                                       const void * pixels, int pitch);
static void SDL_DUMMY_RenderPresent(SDL_Renderer * renderer);
static void SDL_DUMMY_DestroyRenderer(SDL_Renderer * renderer);


SDL_RenderDriver SDL_DUMMY_RenderDriver = {
    SDL_DUMMY_CreateRenderer,
    {
     "dummy",
     (SDL_RENDERER_SINGLEBUFFER | SDL_RENDERER_PRESENTCOPY |
      SDL_RENDERER_PRESENTFLIP2 | SDL_RENDERER_PRESENTFLIP3 |
      SDL_RENDERER_PRESENTDISCARD),
     }
};

typedef struct
{
    int current_screen;
    SDL_Surface *screens[3];
} SDL_DUMMY_RenderData;

SDL_Renderer *
SDL_DUMMY_CreateRenderer(SDL_Window * window, Uint32 flags)
{
    SDL_VideoDisplay *display = window->display;
    SDL_DisplayMode *displayMode = &display->current_mode;
    SDL_Renderer *renderer;
    SDL_DUMMY_RenderData *data;
    int i, n;
    int bpp;
    Uint32 Rmask, Gmask, Bmask, Amask;

    if (!SDL_PixelFormatEnumToMasks
        (displayMode->format, &bpp, &Rmask, &Gmask, &Bmask, &Amask)) {
        SDL_SetError("Unknown display format");
        return NULL;
    }

    renderer = (SDL_Renderer *) SDL_calloc(1, sizeof(*renderer));
    if (!renderer) {
        SDL_OutOfMemory();
        return NULL;
    }

    data = (SDL_DUMMY_RenderData *) SDL_malloc(sizeof(*data));
    if (!data) {
        SDL_DUMMY_DestroyRenderer(renderer);
        SDL_OutOfMemory();
        return NULL;
    }
    SDL_zerop(data);

    renderer->RenderDrawPoints = SDL_DUMMY_RenderDrawPoints;
    renderer->RenderDrawLines = SDL_DUMMY_RenderDrawLines;
    renderer->RenderDrawRects = SDL_DUMMY_RenderDrawRects;
    renderer->RenderFillRects = SDL_DUMMY_RenderFillRects;
    renderer->RenderCopy = SDL_DUMMY_RenderCopy;
    renderer->RenderReadPixels = SDL_DUMMY_RenderReadPixels;
    renderer->RenderWritePixels = SDL_DUMMY_RenderWritePixels;
    renderer->RenderPresent = SDL_DUMMY_RenderPresent;
    renderer->DestroyRenderer = SDL_DUMMY_DestroyRenderer;
    renderer->info.name = SDL_DUMMY_RenderDriver.info.name;
    renderer->info.flags = 0;
    renderer->window = window;
    renderer->driverdata = data;
    Setup_SoftwareRenderer(renderer);

    if (flags & SDL_RENDERER_PRESENTFLIP2) {
        renderer->info.flags |= SDL_RENDERER_PRESENTFLIP2;
        n = 2;
    } else if (flags & SDL_RENDERER_PRESENTFLIP3) {
        renderer->info.flags |= SDL_RENDERER_PRESENTFLIP3;
        n = 3;
    } else {
        renderer->info.flags |= SDL_RENDERER_PRESENTCOPY;
        n = 1;
    }
    for (i = 0; i < n; ++i) {
        data->screens[i] =
            SDL_CreateRGBSurface(0, window->w, window->h, bpp, Rmask, Gmask,
                                 Bmask, Amask);
        if (!data->screens[i]) {
            SDL_DUMMY_DestroyRenderer(renderer);
            return NULL;
        }
        SDL_SetSurfacePalette(data->screens[i], display->palette);
    }
    data->current_screen = 0;

    return renderer;
}

static int
SDL_DUMMY_RenderDrawPoints(SDL_Renderer * renderer,
                           const SDL_Point * points, int count)
{
    SDL_DUMMY_RenderData *data =
        (SDL_DUMMY_RenderData *) renderer->driverdata;
    SDL_Surface *target = data->screens[data->current_screen];

    if (renderer->blendMode == SDL_BLENDMODE_NONE ||
        renderer->blendMode == SDL_BLENDMODE_MASK) {
        Uint32 color = SDL_MapRGBA(target->format,
                                   renderer->r, renderer->g, renderer->b,
                                   renderer->a);

        return SDL_DrawPoints(target, points, count, color);
    } else {
        return SDL_BlendPoints(target, points, count, renderer->blendMode,
                               renderer->r, renderer->g, renderer->b,
                               renderer->a);
    }
}

static int
SDL_DUMMY_RenderDrawLines(SDL_Renderer * renderer,
                          const SDL_Point * points, int count)
{
    SDL_DUMMY_RenderData *data =
        (SDL_DUMMY_RenderData *) renderer->driverdata;
    SDL_Surface *target = data->screens[data->current_screen];

    if (renderer->blendMode == SDL_BLENDMODE_NONE ||
        renderer->blendMode == SDL_BLENDMODE_MASK) {
        Uint32 color = SDL_MapRGBA(target->format,
                                   renderer->r, renderer->g, renderer->b,
                                   renderer->a);

        return SDL_DrawLines(target, points, count, color);
    } else {
        return SDL_BlendLines(target, points, count, renderer->blendMode,
                              renderer->r, renderer->g, renderer->b,
                              renderer->a);
    }
}

static int
SDL_DUMMY_RenderDrawRects(SDL_Renderer * renderer, const SDL_Rect ** rects,
                          int count)
{
    SDL_DUMMY_RenderData *data =
        (SDL_DUMMY_RenderData *) renderer->driverdata;
    SDL_Surface *target = data->screens[data->current_screen];

    if (renderer->blendMode == SDL_BLENDMODE_NONE ||
        renderer->blendMode == SDL_BLENDMODE_MASK) {
        Uint32 color = SDL_MapRGBA(target->format,
                                   renderer->r, renderer->g, renderer->b,
                                   renderer->a);

        return SDL_DrawRects(target, rects, count, color);
    } else {
        return SDL_BlendRects(target, rects, count,
                              renderer->blendMode,
                              renderer->r, renderer->g, renderer->b,
                              renderer->a);
    }
}

static int
SDL_DUMMY_RenderFillRects(SDL_Renderer * renderer, const SDL_Rect ** rects,
                          int count)
{
    SDL_DUMMY_RenderData *data =
        (SDL_DUMMY_RenderData *) renderer->driverdata;
    SDL_Surface *target = data->screens[data->current_screen];

    if (renderer->blendMode == SDL_BLENDMODE_NONE ||
        renderer->blendMode == SDL_BLENDMODE_MASK) {
        Uint32 color = SDL_MapRGBA(target->format,
                                   renderer->r, renderer->g, renderer->b,
                                   renderer->a);

        return SDL_FillRects(target, rects, count, color);
    } else {
        return SDL_BlendFillRects(target, rects, count,
                                  renderer->blendMode,
                                  renderer->r, renderer->g, renderer->b,
                                  renderer->a);
    }
}

static int
SDL_DUMMY_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
                     const SDL_Rect * srcrect, const SDL_Rect * dstrect)
{
    SDL_DUMMY_RenderData *data =
        (SDL_DUMMY_RenderData *) renderer->driverdata;
    SDL_Window *window = renderer->window;
    SDL_VideoDisplay *display = window->display;

    if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {
        SDL_Surface *target = data->screens[data->current_screen];
        void *pixels =
            (Uint8 *) target->pixels + dstrect->y * target->pitch +
            dstrect->x * target->format->BytesPerPixel;
        return SDL_SW_CopyYUVToRGB((SDL_SW_YUVTexture *) texture->driverdata,
                                   srcrect, display->current_mode.format,
                                   dstrect->w, dstrect->h, pixels,
                                   target->pitch);
    } else {
        SDL_Surface *surface = (SDL_Surface *) texture->driverdata;
        SDL_Surface *target = data->screens[data->current_screen];
        SDL_Rect real_srcrect = *srcrect;
        SDL_Rect real_dstrect = *dstrect;

        return SDL_LowerBlit(surface, &real_srcrect, target, &real_dstrect);
    }
}

static int
SDL_DUMMY_RenderReadPixels(SDL_Renderer * renderer, const SDL_Rect * rect,
                           Uint32 format, void * pixels, int pitch)
{
    SDL_DUMMY_RenderData *data =
        (SDL_DUMMY_RenderData *) renderer->driverdata;
    SDL_Window *window = renderer->window;
    SDL_VideoDisplay *display = window->display;
    SDL_Surface *screen = data->screens[data->current_screen];
    Uint32 screen_format = display->current_mode.format;
    Uint8 *screen_pixels = (Uint8 *) screen->pixels +
                            rect->y * screen->pitch +
                            rect->x * screen->format->BytesPerPixel;
    int screen_pitch = screen->pitch;

    return SDL_ConvertPixels(rect->w, rect->h,
                             screen_format, screen_pixels, screen_pitch,
                             format, pixels, pitch);
}

static int
SDL_DUMMY_RenderWritePixels(SDL_Renderer * renderer, const SDL_Rect * rect,
                            Uint32 format, const void * pixels, int pitch)
{
    SDL_DUMMY_RenderData *data =
        (SDL_DUMMY_RenderData *) renderer->driverdata;
    SDL_Window *window = renderer->window;
    SDL_VideoDisplay *display = window->display;
    SDL_Surface *screen = data->screens[data->current_screen];
    Uint32 screen_format = display->current_mode.format;
    Uint8 *screen_pixels = (Uint8 *) screen->pixels +
                            rect->y * screen->pitch +
                            rect->x * screen->format->BytesPerPixel;
    int screen_pitch = screen->pitch;

    return SDL_ConvertPixels(rect->w, rect->h,
                             format, pixels, pitch,
                             screen_format, screen_pixels, screen_pitch);
}

static void
SDL_DUMMY_RenderPresent(SDL_Renderer * renderer)
{
    static int frame_number;
    SDL_DUMMY_RenderData *data =
        (SDL_DUMMY_RenderData *) renderer->driverdata;

    /* Send the data to the display */
    if (SDL_getenv("SDL_VIDEO_DUMMY_SAVE_FRAMES")) {
        char file[128];
        SDL_snprintf(file, sizeof(file), "SDL_window%d-%8.8d.bmp",
                     renderer->window->id, ++frame_number);
        SDL_SaveBMP(data->screens[data->current_screen], file);
    }

    /* Update the flipping chain, if any */
    if (renderer->info.flags & SDL_RENDERER_PRESENTFLIP2) {
        data->current_screen = (data->current_screen + 1) % 2;
    } else if (renderer->info.flags & SDL_RENDERER_PRESENTFLIP3) {
        data->current_screen = (data->current_screen + 1) % 3;
    }
}

static void
SDL_DUMMY_DestroyRenderer(SDL_Renderer * renderer)
{
    SDL_DUMMY_RenderData *data =
        (SDL_DUMMY_RenderData *) renderer->driverdata;
    int i;

    if (data) {
        for (i = 0; i < SDL_arraysize(data->screens); ++i) {
            if (data->screens[i]) {
                SDL_FreeSurface(data->screens[i]);
            }
        }
        SDL_free(data);
    }
    SDL_free(renderer);
}

/* vi: set ts=4 sw=4 expandtab: */