static int
D3D_CreateTexture(SDL_Renderer * renderer, SDL_Texture * texture)
{
    D3D_RenderData *renderdata = (D3D_RenderData *) renderer->driverdata;
    SDL_Window *window = renderer->window;
    D3DFORMAT display_format = renderdata->pparams.BackBufferFormat;
    D3D_TextureData *data;
    D3DPOOL pool;
    DWORD usage;
    HRESULT result;

    data = (D3D_TextureData *) SDL_calloc(1, sizeof(*data));
    if (!data) {
        SDL_OutOfMemory();
        return -1;
    }
    data->scaleMode = GetScaleQuality();

    texture->driverdata = data;

#ifdef USE_DYNAMIC_TEXTURE
    if (texture->access == SDL_TEXTUREACCESS_STREAMING) {
        pool = D3DPOOL_DEFAULT;
        usage = D3DUSAGE_DYNAMIC;
    } else
#endif
    if (texture->access == SDL_TEXTUREACCESS_TARGET) {
        /* D3DPOOL_MANAGED does not work with D3DUSAGE_RENDERTARGET */
        pool = D3DPOOL_DEFAULT;
        usage = D3DUSAGE_RENDERTARGET;
    } else {
        pool = D3DPOOL_MANAGED;
        usage = 0;
    }

    result =
        IDirect3DDevice9_CreateTexture(renderdata->device, texture->w,
                                       texture->h, 1, usage,
                                       PixelFormatToD3DFMT(texture->format),
                                       pool, &data->texture, NULL);
    if (FAILED(result)) {
        D3D_SetError("CreateTexture()", result);
        return -1;
    }

    return 0;
}
Esempio n. 2
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static int
SW_RenderCopyEx(SDL_Renderer * renderer, SDL_Texture * texture,
                const SDL_Rect * srcrect, const SDL_FRect * dstrect,
                const double angle, const SDL_FPoint * center, const SDL_RendererFlip flip)
{
    SDL_Surface *surface = SW_ActivateRenderer(renderer);
    SDL_Surface *src = (SDL_Surface *) texture->driverdata;
    SDL_Rect final_rect, tmp_rect;
    SDL_Surface *surface_rotated, *surface_scaled;
    Uint32 colorkey;
    int retval, dstwidth, dstheight, abscenterx, abscentery;
    double cangle, sangle, px, py, p1x, p1y, p2x, p2y, p3x, p3y, p4x, p4y;

    if (!surface) {
        return -1;
    }

    if (renderer->viewport.x || renderer->viewport.y) {
        final_rect.x = (int)(renderer->viewport.x + dstrect->x);
        final_rect.y = (int)(renderer->viewport.y + dstrect->y);
    } else {
        final_rect.x = (int)dstrect->x;
        final_rect.y = (int)dstrect->y;
    }
    final_rect.w = (int)dstrect->w;
    final_rect.h = (int)dstrect->h;

    surface_scaled = SDL_CreateRGBSurface(SDL_SWSURFACE, final_rect.w, final_rect.h, src->format->BitsPerPixel,
                                          src->format->Rmask, src->format->Gmask,
                                          src->format->Bmask, src->format->Amask );
    if (surface_scaled) {
        SDL_GetColorKey(src, &colorkey);
        SDL_SetColorKey(surface_scaled, SDL_TRUE, colorkey);
        tmp_rect = final_rect;
        tmp_rect.x = 0;
        tmp_rect.y = 0;

        retval = SDL_BlitScaled(src, srcrect, surface_scaled, &tmp_rect);
        if (!retval) {
            SDLgfx_rotozoomSurfaceSizeTrig(tmp_rect.w, tmp_rect.h, -angle, &dstwidth, &dstheight, &cangle, &sangle);
            surface_rotated = SDLgfx_rotateSurface(surface_scaled, -angle, dstwidth/2, dstheight/2, GetScaleQuality(), flip & SDL_FLIP_HORIZONTAL, flip & SDL_FLIP_VERTICAL, dstwidth, dstheight, cangle, sangle);
            if(surface_rotated) {
                /* Find out where the new origin is by rotating the four final_rect points around the center and then taking the extremes */
                abscenterx = final_rect.x + (int)center->x;
                abscentery = final_rect.y + (int)center->y;
                /* Compensate the angle inversion to match the behaviour of the other backends */
                sangle = -sangle;

                /* Top Left */
                px = final_rect.x - abscenterx;
                py = final_rect.y - abscentery;
                p1x = px * cangle - py * sangle + abscenterx;
                p1y = px * sangle + py * cangle + abscentery;

                /* Top Right */
                px = final_rect.x + final_rect.w - abscenterx;
                py = final_rect.y - abscentery;
                p2x = px * cangle - py * sangle + abscenterx;
                p2y = px * sangle + py * cangle + abscentery;

                /* Bottom Left */
                px = final_rect.x - abscenterx;
                py = final_rect.y + final_rect.h - abscentery;
                p3x = px * cangle - py * sangle + abscenterx;
                p3y = px * sangle + py * cangle + abscentery;

                /* Bottom Right */
                px = final_rect.x + final_rect.w - abscenterx;
                py = final_rect.y + final_rect.h - abscentery;
                p4x = px * cangle - py * sangle + abscenterx;
                p4y = px * sangle + py * cangle + abscentery;

                tmp_rect.x = (int)MIN(MIN(p1x, p2x), MIN(p3x, p4x));
                tmp_rect.y = (int)MIN(MIN(p1y, p2y), MIN(p3y, p4y));
                tmp_rect.w = dstwidth;
                tmp_rect.h = dstheight;

                retval = SDL_BlitSurface(surface_rotated, NULL, surface, &tmp_rect);
                SDL_FreeSurface(surface_scaled);
                SDL_FreeSurface(surface_rotated);
                return retval;
            }
        }
        return retval;
    }

    return -1;
}
Esempio n. 3
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static int
SW_RenderCopyEx(SDL_Renderer * renderer, SDL_Texture * texture,
                const SDL_Rect * srcrect, const SDL_FRect * dstrect,
                const double angle, const SDL_FPoint * center, const SDL_RendererFlip flip)
{
    SDL_Surface *surface = SW_ActivateRenderer(renderer);
    SDL_Surface *src = (SDL_Surface *) texture->driverdata;
    SDL_Rect final_rect, tmp_rect;
    SDL_Surface *surface_rotated, *surface_scaled;
    int retval, dstwidth, dstheight, abscenterx, abscentery;
    double cangle, sangle, px, py, p1x, p1y, p2x, p2y, p3x, p3y, p4x, p4y;

    if (!surface) {
        return -1;
    }

    if (renderer->viewport.x || renderer->viewport.y) {
        final_rect.x = (int)(renderer->viewport.x + dstrect->x);
        final_rect.y = (int)(renderer->viewport.y + dstrect->y);
    } else {
        final_rect.x = (int)dstrect->x;
        final_rect.y = (int)dstrect->y;
    }
    final_rect.w = (int)dstrect->w;
    final_rect.h = (int)dstrect->h;

    /* SDLgfx_rotateSurface doesn't accept a source rectangle, so crop and scale if we need to */
    tmp_rect = final_rect;
    tmp_rect.x = 0;
    tmp_rect.y = 0;
    if (srcrect->w == final_rect.w && srcrect->h == final_rect.h && srcrect->x == 0 && srcrect->y == 0) {
        surface_scaled = src; /* but if we don't need to, just use the original */
        retval = 0;
    } else {
        SDL_Surface *blit_src = src;
        Uint32 colorkey;
        SDL_BlendMode blendMode;
        Uint8 alphaMod, r, g, b;
        SDL_bool cloneSource = SDL_FALSE;

        surface_scaled = SDL_CreateRGBSurface(SDL_SWSURFACE, final_rect.w, final_rect.h, src->format->BitsPerPixel,
                                              src->format->Rmask, src->format->Gmask,
                                              src->format->Bmask, src->format->Amask );
        if (!surface_scaled) {
            return -1;
        }

        /* copy the color key, alpha mod, blend mode, and color mod so the scaled surface behaves like the source */
        if (SDL_GetColorKey(src, &colorkey) == 0) {
            SDL_SetColorKey(surface_scaled, SDL_TRUE, colorkey);
            cloneSource = SDL_TRUE;
        }
        SDL_GetSurfaceAlphaMod(src, &alphaMod); /* these will be copied to surface_scaled below if necessary */
        SDL_GetSurfaceBlendMode(src, &blendMode);
        SDL_GetSurfaceColorMod(src, &r, &g, &b);

        /* now we need to blit the src into surface_scaled. since we want to copy the colors from the source to
         * surface_scaled rather than blend them, etc. we'll need to disable the blend mode, alpha mod, etc.
         * but we don't want to modify src (in case it's being used on other threads), so we'll need to clone it
         * before changing the blend options
         */
        cloneSource |= blendMode != SDL_BLENDMODE_NONE || (alphaMod & r & g & b) != 255;
        if (cloneSource) {
            blit_src = SDL_ConvertSurface(src, src->format, src->flags); /* clone src */
            if (!blit_src) {
                SDL_FreeSurface(surface_scaled);
                return -1;
            }
            SDL_SetSurfaceAlphaMod(blit_src, 255); /* disable all blending options in blit_src */
            SDL_SetSurfaceBlendMode(blit_src, SDL_BLENDMODE_NONE);
            SDL_SetColorKey(blit_src, 0, 0);
            SDL_SetSurfaceColorMod(blit_src, 255, 255, 255);
            SDL_SetSurfaceRLE(blit_src, 0); /* don't RLE encode a surface we'll only use once */

            SDL_SetSurfaceAlphaMod(surface_scaled, alphaMod); /* copy blending options to surface_scaled */
            SDL_SetSurfaceBlendMode(surface_scaled, blendMode);
            SDL_SetSurfaceColorMod(surface_scaled, r, g, b);
        }

        retval = SDL_BlitScaled(blit_src, srcrect, surface_scaled, &tmp_rect);
        if (blit_src != src) {
            SDL_FreeSurface(blit_src);
        }
    }

    if (!retval) {
        SDLgfx_rotozoomSurfaceSizeTrig(tmp_rect.w, tmp_rect.h, angle, &dstwidth, &dstheight, &cangle, &sangle);
        surface_rotated = SDLgfx_rotateSurface(surface_scaled, angle, dstwidth/2, dstheight/2, GetScaleQuality(), flip & SDL_FLIP_HORIZONTAL, flip & SDL_FLIP_VERTICAL, dstwidth, dstheight, cangle, sangle);
        if(surface_rotated) {
            /* Find out where the new origin is by rotating the four final_rect points around the center and then taking the extremes */
            abscenterx = final_rect.x + (int)center->x;
            abscentery = final_rect.y + (int)center->y;
            /* Compensate the angle inversion to match the behaviour of the other backends */
            sangle = -sangle;

            /* Top Left */
            px = final_rect.x - abscenterx;
            py = final_rect.y - abscentery;
            p1x = px * cangle - py * sangle + abscenterx;
            p1y = px * sangle + py * cangle + abscentery;

            /* Top Right */
            px = final_rect.x + final_rect.w - abscenterx;
            py = final_rect.y - abscentery;
            p2x = px * cangle - py * sangle + abscenterx;
            p2y = px * sangle + py * cangle + abscentery;

            /* Bottom Left */
            px = final_rect.x - abscenterx;
            py = final_rect.y + final_rect.h - abscentery;
            p3x = px * cangle - py * sangle + abscenterx;
            p3y = px * sangle + py * cangle + abscentery;

            /* Bottom Right */
            px = final_rect.x + final_rect.w - abscenterx;
            py = final_rect.y + final_rect.h - abscentery;
            p4x = px * cangle - py * sangle + abscenterx;
            p4y = px * sangle + py * cangle + abscentery;

            tmp_rect.x = (int)MIN(MIN(p1x, p2x), MIN(p3x, p4x));
            tmp_rect.y = (int)MIN(MIN(p1y, p2y), MIN(p3y, p4y));
            tmp_rect.w = dstwidth;
            tmp_rect.h = dstheight;

            retval = SDL_BlitSurface(surface_rotated, NULL, surface, &tmp_rect);
            SDL_FreeSurface(surface_rotated);
        }
    }

    if (surface_scaled != src) {
        SDL_FreeSurface(surface_scaled);
    }
    return retval;
}
Esempio n. 4
0
static int
GLES_CreateTexture(SDL_Renderer * renderer, SDL_Texture * texture)
{
    GLES_RenderData *renderdata = (GLES_RenderData *) renderer->driverdata;
    GLES_TextureData *data;
    GLint internalFormat;
    GLenum format, type;
    int texture_w, texture_h;
    GLenum scaleMode;
    GLenum result;

    GLES_ActivateRenderer(renderer);

    switch (texture->format) {
    case SDL_PIXELFORMAT_ABGR8888:
        internalFormat = GL_RGBA;
        format = GL_RGBA;
        type = GL_UNSIGNED_BYTE;
        break;
    default:
        return SDL_SetError("Texture format not supported");
    }

    data = (GLES_TextureData *) SDL_calloc(1, sizeof(*data));
    if (!data) {
        return SDL_OutOfMemory();
    }

    if (texture->access == SDL_TEXTUREACCESS_STREAMING) {
        data->pitch = texture->w * SDL_BYTESPERPIXEL(texture->format);
        data->pixels = SDL_calloc(1, texture->h * data->pitch);
        if (!data->pixels) {
            SDL_free(data);
            return SDL_OutOfMemory();
        }
    }

    
    if (texture->access == SDL_TEXTUREACCESS_TARGET) {
        if (!renderdata->GL_OES_framebuffer_object_supported) {
            SDL_free(data);
            return SDL_SetError("GL_OES_framebuffer_object not supported");
        }
        data->fbo = GLES_GetFBO(renderer->driverdata, texture->w, texture->h);
    } else {
        data->fbo = NULL;
    }
    

    renderdata->glGetError();
    renderdata->glEnable(GL_TEXTURE_2D);
    renderdata->glGenTextures(1, &data->texture);
    result = renderdata->glGetError();
    if (result != GL_NO_ERROR) {
        SDL_free(data);
        return GLES_SetError("glGenTextures()", result);
    }

    data->type = GL_TEXTURE_2D;
    /* no NPOV textures allowed in OpenGL ES (yet) */
    texture_w = power_of_2(texture->w);
    texture_h = power_of_2(texture->h);
    data->texw = (GLfloat) texture->w / texture_w;
    data->texh = (GLfloat) texture->h / texture_h;

    data->format = format;
    data->formattype = type;
    scaleMode = GetScaleQuality();
    renderdata->glBindTexture(data->type, data->texture);
    renderdata->glTexParameteri(data->type, GL_TEXTURE_MIN_FILTER, scaleMode);
    renderdata->glTexParameteri(data->type, GL_TEXTURE_MAG_FILTER, scaleMode);
    renderdata->glTexParameteri(data->type, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
    renderdata->glTexParameteri(data->type, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);

    renderdata->glTexImage2D(data->type, 0, internalFormat, texture_w,
                             texture_h, 0, format, type, NULL);
    renderdata->glDisable(GL_TEXTURE_2D);

    result = renderdata->glGetError();
    if (result != GL_NO_ERROR) {
        SDL_free(data);
        return GLES_SetError("glTexImage2D()", result);
    }
    
    texture->driverdata = data;
    return 0;
}
Esempio n. 5
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static int
GLES2_CreateTexture(SDL_Renderer *renderer, SDL_Texture *texture)
{
    GLES2_TextureData *tdata;
    GLenum format;
    GLenum type;
    GLenum scaleMode;

    GLES2_ActivateRenderer(renderer);

    /* Determine the corresponding GLES texture format params */
    switch (texture->format)
    {
    case SDL_PIXELFORMAT_ABGR8888:
        format = GL_RGBA;
        type = GL_UNSIGNED_BYTE;
        break;
    default:
        SDL_SetError("Texture format not supported");
        return -1;
    }

    /* Allocate a texture struct */
    tdata = (GLES2_TextureData *)SDL_calloc(1, sizeof(GLES2_TextureData));
    if (!tdata)
    {
        SDL_OutOfMemory();
        return -1;
    }
    tdata->texture = 0;
    tdata->texture_type = GL_TEXTURE_2D;
    tdata->pixel_format = format;
    tdata->pixel_type = type;
    scaleMode = GetScaleQuality();

    /* Allocate a blob for image data */
    if (texture->access == SDL_TEXTUREACCESS_STREAMING)
    {
        tdata->pitch = texture->w * SDL_BYTESPERPIXEL(texture->format);
        tdata->pixel_data = SDL_calloc(1, tdata->pitch * texture->h);
        if (!tdata->pixel_data)
        {
            SDL_OutOfMemory();
            SDL_free(tdata);
            return -1;
        }
    }

    /* Allocate the texture */
    glGetError();
    glGenTextures(1, &tdata->texture);
    glActiveTexture(GL_TEXTURE0);
    glBindTexture(tdata->texture_type, tdata->texture);
    glTexParameteri(tdata->texture_type, GL_TEXTURE_MIN_FILTER, scaleMode);
    glTexParameteri(tdata->texture_type, GL_TEXTURE_MAG_FILTER, scaleMode);
    glTexParameteri(tdata->texture_type, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
    glTexParameteri(tdata->texture_type, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
    glTexImage2D(tdata->texture_type, 0, format, texture->w, texture->h, 0, format, type, NULL);
    if (glGetError() != GL_NO_ERROR)
    {
        SDL_SetError("Texture creation failed");
        glDeleteTextures(1, &tdata->texture);
        SDL_free(tdata);
        return -1;
    }
    texture->driverdata = tdata;
    return 0;
}
Esempio n. 6
0
static int
SW_RenderCopyEx(SDL_Renderer * renderer, SDL_Texture * texture,
                const SDL_Rect * srcrect, const SDL_FRect * dstrect,
                const double angle, const SDL_FPoint * center, const SDL_RendererFlip flip)
{
    SDL_Surface *surface = SW_ActivateRenderer(renderer);
    SDL_Surface *src = (SDL_Surface *) texture->driverdata;
    SDL_Rect final_rect, tmp_rect;
    SDL_Surface *src_clone, *src_rotated, *src_scaled;
    SDL_Surface *mask = NULL, *mask_rotated = NULL;
    int retval = 0, dstwidth, dstheight, abscenterx, abscentery;
    double cangle, sangle, px, py, p1x, p1y, p2x, p2y, p3x, p3y, p4x, p4y;
    SDL_BlendMode blendmode;
    Uint8 alphaMod, rMod, gMod, bMod;
    int applyModulation = SDL_FALSE;
    int blitRequired = SDL_FALSE;
    int isOpaque = SDL_FALSE;

    if (!surface) {
        return -1;
    }

    if (renderer->viewport.x || renderer->viewport.y) {
        final_rect.x = (int)(renderer->viewport.x + dstrect->x);
        final_rect.y = (int)(renderer->viewport.y + dstrect->y);
    } else {
        final_rect.x = (int)dstrect->x;
        final_rect.y = (int)dstrect->y;
    }
    final_rect.w = (int)dstrect->w;
    final_rect.h = (int)dstrect->h;

    tmp_rect = final_rect;
    tmp_rect.x = 0;
    tmp_rect.y = 0;

    /* It is possible to encounter an RLE encoded surface here and locking it is
     * necessary because this code is going to access the pixel buffer directly.
     */
    if (SDL_MUSTLOCK(src)) {
        SDL_LockSurface(src);
    }

    /* Clone the source surface but use its pixel buffer directly.
     * The original source surface must be treated as read-only.
     */
    src_clone = SDL_CreateRGBSurfaceFrom(src->pixels, src->w, src->h, src->format->BitsPerPixel, src->pitch,
                                         src->format->Rmask, src->format->Gmask,
                                         src->format->Bmask, src->format->Amask);
    if (src_clone == NULL) {
        if (SDL_MUSTLOCK(src)) {
            SDL_UnlockSurface(src);
        }
        return -1;
    }

    SDL_GetSurfaceBlendMode(src, &blendmode);
    SDL_GetSurfaceAlphaMod(src, &alphaMod);
    SDL_GetSurfaceColorMod(src, &rMod, &gMod, &bMod);

    /* SDLgfx_rotateSurface only accepts 32-bit surfaces with a 8888 layout. Everything else has to be converted. */
    if (src->format->BitsPerPixel != 32 || SDL_PIXELLAYOUT(src->format->format) != SDL_PACKEDLAYOUT_8888 || !src->format->Amask) {
        blitRequired = SDL_TRUE;
    }

    /* If scaling and cropping is necessary, it has to be taken care of before the rotation. */
    if (!(srcrect->w == final_rect.w && srcrect->h == final_rect.h && srcrect->x == 0 && srcrect->y == 0)) {
        blitRequired = SDL_TRUE;
    }

    /* The color and alpha modulation has to be applied before the rotation when using the NONE and MOD blend modes. */
    if ((blendmode == SDL_BLENDMODE_NONE || blendmode == SDL_BLENDMODE_MOD) && (alphaMod & rMod & gMod & bMod) != 255) {
        applyModulation = SDL_TRUE;
        SDL_SetSurfaceAlphaMod(src_clone, alphaMod);
        SDL_SetSurfaceColorMod(src_clone, rMod, gMod, bMod);
    }

    /* Opaque surfaces are much easier to handle with the NONE blend mode. */
    if (blendmode == SDL_BLENDMODE_NONE && !src->format->Amask && alphaMod == 255) {
        isOpaque = SDL_TRUE;
    }

    /* The NONE blend mode requires a mask for non-opaque surfaces. This mask will be used
     * to clear the pixels in the destination surface. The other steps are explained below.
     */
    if (blendmode == SDL_BLENDMODE_NONE && !isOpaque) {
        mask = SDL_CreateRGBSurface(0, final_rect.w, final_rect.h, 32,
                                    0x00ff0000, 0x0000ff00, 0x000000ff, 0xff000000);
        if (mask == NULL) {
            retval = -1;
        } else {
            SDL_SetSurfaceBlendMode(mask, SDL_BLENDMODE_MOD);
        }
    }

    /* Create a new surface should there be a format mismatch or if scaling, cropping,
     * or modulation is required. It's possible to use the source surface directly otherwise.
     */
    if (!retval && (blitRequired || applyModulation)) {
        SDL_Rect scale_rect = tmp_rect;
        src_scaled = SDL_CreateRGBSurface(0, final_rect.w, final_rect.h, 32,
                                          0x00ff0000, 0x0000ff00, 0x000000ff, 0xff000000);
        if (src_scaled == NULL) {
            retval = -1;
        } else {
            SDL_SetSurfaceBlendMode(src_clone, SDL_BLENDMODE_NONE);
            retval = SDL_BlitScaled(src_clone, srcrect, src_scaled, &scale_rect);
            SDL_FreeSurface(src_clone);
            src_clone = src_scaled;
            src_scaled = NULL;
        }
    }

    /* SDLgfx_rotateSurface is going to make decisions depending on the blend mode. */
    SDL_SetSurfaceBlendMode(src_clone, blendmode);

    if (!retval) {
        SDLgfx_rotozoomSurfaceSizeTrig(tmp_rect.w, tmp_rect.h, angle, &dstwidth, &dstheight, &cangle, &sangle);
        src_rotated = SDLgfx_rotateSurface(src_clone, angle, dstwidth/2, dstheight/2, GetScaleQuality(), flip & SDL_FLIP_HORIZONTAL, flip & SDL_FLIP_VERTICAL, dstwidth, dstheight, cangle, sangle);
        if (src_rotated == NULL) {
            retval = -1;
        }
        if (!retval && mask != NULL) {
            /* The mask needed for the NONE blend mode gets rotated with the same parameters. */
            mask_rotated = SDLgfx_rotateSurface(mask, angle, dstwidth/2, dstheight/2, SDL_FALSE, 0, 0, dstwidth, dstheight, cangle, sangle);
            if (mask_rotated == NULL) {
                retval = -1;
            }
        }
        if (!retval) {
            /* Find out where the new origin is by rotating the four final_rect points around the center and then taking the extremes */
            abscenterx = final_rect.x + (int)center->x;
            abscentery = final_rect.y + (int)center->y;
            /* Compensate the angle inversion to match the behaviour of the other backends */
            sangle = -sangle;

            /* Top Left */
            px = final_rect.x - abscenterx;
            py = final_rect.y - abscentery;
            p1x = px * cangle - py * sangle + abscenterx;
            p1y = px * sangle + py * cangle + abscentery;

            /* Top Right */
            px = final_rect.x + final_rect.w - abscenterx;
            py = final_rect.y - abscentery;
            p2x = px * cangle - py * sangle + abscenterx;
            p2y = px * sangle + py * cangle + abscentery;

            /* Bottom Left */
            px = final_rect.x - abscenterx;
            py = final_rect.y + final_rect.h - abscentery;
            p3x = px * cangle - py * sangle + abscenterx;
            p3y = px * sangle + py * cangle + abscentery;

            /* Bottom Right */
            px = final_rect.x + final_rect.w - abscenterx;
            py = final_rect.y + final_rect.h - abscentery;
            p4x = px * cangle - py * sangle + abscenterx;
            p4y = px * sangle + py * cangle + abscentery;

            tmp_rect.x = (int)MIN(MIN(p1x, p2x), MIN(p3x, p4x));
            tmp_rect.y = (int)MIN(MIN(p1y, p2y), MIN(p3y, p4y));
            tmp_rect.w = dstwidth;
            tmp_rect.h = dstheight;

            /* The NONE blend mode needs some special care with non-opaque surfaces.
             * Other blend modes or opaque surfaces can be blitted directly.
             */
            if (blendmode != SDL_BLENDMODE_NONE || isOpaque) {
                if (applyModulation == SDL_FALSE) {
                    /* If the modulation wasn't already applied, make it happen now. */
                    SDL_SetSurfaceAlphaMod(src_rotated, alphaMod);
                    SDL_SetSurfaceColorMod(src_rotated, rMod, gMod, bMod);
                }
                retval = SDL_BlitSurface(src_rotated, NULL, surface, &tmp_rect);
            } else {
                /* The NONE blend mode requires three steps to get the pixels onto the destination surface.
                 * First, the area where the rotated pixels will be blitted to get set to zero.
                 * This is accomplished by simply blitting a mask with the NONE blend mode.
                 * The colorkey set by the rotate function will discard the correct pixels.
                 */
                SDL_Rect mask_rect = tmp_rect;
                SDL_SetSurfaceBlendMode(mask_rotated, SDL_BLENDMODE_NONE);
                retval = SDL_BlitSurface(mask_rotated, NULL, surface, &mask_rect);
                if (!retval) {
                    /* The next step copies the alpha value. This is done with the BLEND blend mode and
                     * by modulating the source colors with 0. Since the destination is all zeros, this
                     * will effectively set the destination alpha to the source alpha.
                     */
                    SDL_SetSurfaceColorMod(src_rotated, 0, 0, 0);
                    mask_rect = tmp_rect;
                    retval = SDL_BlitSurface(src_rotated, NULL, surface, &mask_rect);
                    if (!retval) {
                        /* The last step gets the color values in place. The ADD blend mode simply adds them to
                         * the destination (where the color values are all zero). However, because the ADD blend
                         * mode modulates the colors with the alpha channel, a surface without an alpha mask needs
                         * to be created. This makes all source pixels opaque and the colors get copied correctly.
                         */
                        SDL_Surface *src_rotated_rgb;
                        src_rotated_rgb = SDL_CreateRGBSurfaceFrom(src_rotated->pixels, src_rotated->w, src_rotated->h,
                                                                   src_rotated->format->BitsPerPixel, src_rotated->pitch,
                                                                   src_rotated->format->Rmask, src_rotated->format->Gmask,
                                                                   src_rotated->format->Bmask, 0);
                        if (src_rotated_rgb == NULL) {
                            retval = -1;
                        } else {
                            SDL_SetSurfaceBlendMode(src_rotated_rgb, SDL_BLENDMODE_ADD);
                            retval = SDL_BlitSurface(src_rotated_rgb, NULL, surface, &tmp_rect);
                            SDL_FreeSurface(src_rotated_rgb);
                        }
                    }
                }
                SDL_FreeSurface(mask_rotated);
            }
            if (src_rotated != NULL) {
                SDL_FreeSurface(src_rotated);
            }
        }
    }

    if (SDL_MUSTLOCK(src)) {
        SDL_UnlockSurface(src);
    }
    if (mask != NULL) {
        SDL_FreeSurface(mask);
    }
    if (src_clone != NULL) {
        SDL_FreeSurface(src_clone);
    }
    return retval;
}
Esempio n. 7
0
static int
GL_CreateTexture(SDL_Renderer * renderer, SDL_Texture * texture)
{
    GL_RenderData *renderdata = (GL_RenderData *) renderer->driverdata;
    GL_TextureData *data;
    GLint internalFormat;
    GLenum format, type;
    int texture_w, texture_h;
    GLenum scaleMode;
    GLenum result;

    GL_ActivateRenderer(renderer);

    if (!convert_format(renderdata, texture->format, &internalFormat,
                        &format, &type)) {
        SDL_SetError("Texture format %s not supported by OpenGL",
                     SDL_GetPixelFormatName(texture->format));
        return -1;
    }

    data = (GL_TextureData *) SDL_calloc(1, sizeof(*data));
    if (!data) {
        SDL_OutOfMemory();
        return -1;
    }

    if (texture->access == SDL_TEXTUREACCESS_STREAMING) {
        size_t size;
        data->pitch = texture->w * SDL_BYTESPERPIXEL(texture->format);
        size = texture->h * data->pitch;
        if (texture->format == SDL_PIXELFORMAT_YV12 ||
            texture->format == SDL_PIXELFORMAT_IYUV) {
            /* Need to add size for the U and V planes */
            size += (2 * (texture->h * data->pitch) / 4);
        }
        data->pixels = SDL_calloc(1, size);
        if (!data->pixels) {
            SDL_OutOfMemory();
            SDL_free(data);
            return -1;
        }
    }

    texture->driverdata = data;

    renderdata->glGetError();
    renderdata->glGenTextures(1, &data->texture);
    if (renderdata->GL_ARB_texture_rectangle_supported) {
        data->type = GL_TEXTURE_RECTANGLE_ARB;
        texture_w = texture->w;
        texture_h = texture->h;
        data->texw = (GLfloat) texture_w;
        data->texh = (GLfloat) texture_h;
    } else {
        data->type = GL_TEXTURE_2D;
        texture_w = power_of_2(texture->w);
        texture_h = power_of_2(texture->h);
        data->texw = (GLfloat) (texture->w) / texture_w;
        data->texh = (GLfloat) texture->h / texture_h;
    }

    data->format = format;
    data->formattype = type;
    scaleMode = GetScaleQuality();
    renderdata->glEnable(data->type);
    renderdata->glBindTexture(data->type, data->texture);
    renderdata->glTexParameteri(data->type, GL_TEXTURE_MIN_FILTER, scaleMode);
    renderdata->glTexParameteri(data->type, GL_TEXTURE_MAG_FILTER, scaleMode);
    renderdata->glTexParameteri(data->type, GL_TEXTURE_WRAP_S,
                                GL_CLAMP_TO_EDGE);
    renderdata->glTexParameteri(data->type, GL_TEXTURE_WRAP_T,
                                GL_CLAMP_TO_EDGE);
#ifdef __MACOSX__
#ifndef GL_TEXTURE_STORAGE_HINT_APPLE
#define GL_TEXTURE_STORAGE_HINT_APPLE       0x85BC
#endif
#ifndef STORAGE_CACHED_APPLE
#define STORAGE_CACHED_APPLE                0x85BE
#endif
#ifndef STORAGE_SHARED_APPLE
#define STORAGE_SHARED_APPLE                0x85BF
#endif
    if (texture->access == SDL_TEXTUREACCESS_STREAMING) {
        renderdata->glTexParameteri(data->type, GL_TEXTURE_STORAGE_HINT_APPLE,
                                    GL_STORAGE_SHARED_APPLE);
    } else {
        renderdata->glTexParameteri(data->type, GL_TEXTURE_STORAGE_HINT_APPLE,
                                    GL_STORAGE_CACHED_APPLE);
    }
    if (texture->access == SDL_TEXTUREACCESS_STREAMING
        && texture->format == SDL_PIXELFORMAT_ARGB8888
        && (texture->w % 8) == 0) {
        renderdata->glPixelStorei(GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE);
        renderdata->glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
        renderdata->glPixelStorei(GL_UNPACK_ROW_LENGTH,
                          (data->pitch / SDL_BYTESPERPIXEL(texture->format)));
        renderdata->glTexImage2D(data->type, 0, internalFormat, texture_w,
                                 texture_h, 0, format, type, data->pixels);
        renderdata->glPixelStorei(GL_UNPACK_CLIENT_STORAGE_APPLE, GL_FALSE);
    }
    else
#endif
    {
        renderdata->glTexImage2D(data->type, 0, internalFormat, texture_w,
                                 texture_h, 0, format, type, NULL);
    }
    renderdata->glDisable(data->type);
    result = renderdata->glGetError();
    if (result != GL_NO_ERROR) {
        GL_SetError("glTexImage2D()", result);
        return -1;
    }

    if (texture->format == SDL_PIXELFORMAT_YV12 ||
        texture->format == SDL_PIXELFORMAT_IYUV) {
        data->yuv = SDL_TRUE;

        renderdata->glGenTextures(1, &data->utexture);
        renderdata->glGenTextures(1, &data->vtexture);
        renderdata->glEnable(data->type);

        renderdata->glBindTexture(data->type, data->utexture);
        renderdata->glTexParameteri(data->type, GL_TEXTURE_MIN_FILTER,
                                    scaleMode);
        renderdata->glTexParameteri(data->type, GL_TEXTURE_MAG_FILTER,
                                    scaleMode);
        renderdata->glTexParameteri(data->type, GL_TEXTURE_WRAP_S,
                                    GL_CLAMP_TO_EDGE);
        renderdata->glTexParameteri(data->type, GL_TEXTURE_WRAP_T,
                                    GL_CLAMP_TO_EDGE);
        renderdata->glTexImage2D(data->type, 0, internalFormat, texture_w/2,
                                 texture_h/2, 0, format, type, NULL);

        renderdata->glBindTexture(data->type, data->vtexture);
        renderdata->glTexParameteri(data->type, GL_TEXTURE_MIN_FILTER,
                                    scaleMode);
        renderdata->glTexParameteri(data->type, GL_TEXTURE_MAG_FILTER,
                                    scaleMode);
        renderdata->glTexParameteri(data->type, GL_TEXTURE_WRAP_S,
                                    GL_CLAMP_TO_EDGE);
        renderdata->glTexParameteri(data->type, GL_TEXTURE_WRAP_T,
                                    GL_CLAMP_TO_EDGE);
        renderdata->glTexImage2D(data->type, 0, internalFormat, texture_w/2,
                                 texture_h/2, 0, format, type, NULL);

        renderdata->glDisable(data->type);
    }
    return 0;
}