SDL_blendfillrect.h File Reference

#include "../../SDL_internal.h"

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Functions
int	SDL_BlendFillRect (SDL_Surface *dst, const SDL_Rect *rect, SDL_BlendMode blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
int	SDL_BlendFillRects (SDL_Surface *dst, const SDL_Rect *rects, int count, SDL_BlendMode blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a)

Function Documentation

int SDL_BlendFillRect	(	SDL_Surface *	dst,
		const SDL_Rect *	rect,
		SDL_BlendMode	blendMode,
		Uint8	r,
		Uint8	g,
		Uint8	b,
		Uint8	a
	)

Definition at line 196 of file SDL_blendfillrect.c.

References SDL_PixelFormat::Amask, SDL_PixelFormat::BitsPerPixel, SDL_Surface::clip_rect, DRAW_MUL, SDL_Surface::format, SDL_PixelFormat::Rmask, SDL_BlendFillRect_ARGB8888(), SDL_BlendFillRect_RGB(), SDL_BlendFillRect_RGB555(), SDL_BlendFillRect_RGB565(), SDL_BlendFillRect_RGB888(), SDL_BlendFillRect_RGBA(), SDL_BLENDMODE_ADD, SDL_BLENDMODE_BLEND, SDL_IntersectRect, and SDL_SetError.

{
    SDL_Rect clipped;

    if (!dst) {
        return SDL_SetError("Passed NULL destination surface");
    }

    /* This function doesn't work on surfaces < 8 bpp */
    if (dst->format->BitsPerPixel < 8) {
        return SDL_SetError("SDL_BlendFillRect(): Unsupported surface format");
    }

    /* If 'rect' == NULL, then fill the whole surface */
    if (rect) {
        /* Perform clipping */
        if (!SDL_IntersectRect(rect, &dst->clip_rect, &clipped)) {
            return 0;
        }
        rect = &clipped;
    } else {
        rect = &dst->clip_rect;
    }

    if (blendMode == SDL_BLENDMODE_BLEND || blendMode == SDL_BLENDMODE_ADD) {
        r = DRAW_MUL(r, a);
        g = DRAW_MUL(g, a);
        b = DRAW_MUL(b, a);
    }

    switch (dst->format->BitsPerPixel) {
    case 15:
        switch (dst->format->Rmask) {
        case 0x7C00:
            return SDL_BlendFillRect_RGB555(dst, rect, blendMode, r, g, b, a);
        }
        break;
    case 16:
        switch (dst->format->Rmask) {
        case 0xF800:
            return SDL_BlendFillRect_RGB565(dst, rect, blendMode, r, g, b, a);
        }
        break;
    case 32:
        switch (dst->format->Rmask) {
        case 0x00FF0000:
            if (!dst->format->Amask) {
                return SDL_BlendFillRect_RGB888(dst, rect, blendMode, r, g, b, a);
            } else {
                return SDL_BlendFillRect_ARGB8888(dst, rect, blendMode, r, g, b, a);
            }
            /* break; -Wunreachable-code-break */
        }
        break;
    default:
        break;
    }

    if (!dst->format->Amask) {
        return SDL_BlendFillRect_RGB(dst, rect, blendMode, r, g, b, a);
    } else {
        return SDL_BlendFillRect_RGBA(dst, rect, blendMode, r, g, b, a);
    }
}

int SDL_BlendFillRects	(	SDL_Surface *	dst,
		const SDL_Rect *	rects,
		int	count,
		SDL_BlendMode	blendMode,
		Uint8	r,
		Uint8	g,
		Uint8	b,
		Uint8	a
	)

Definition at line 263 of file SDL_blendfillrect.c.

References SDL_PixelFormat::Amask, SDL_PixelFormat::BitsPerPixel, blendMode, SDL_Surface::clip_rect, DRAW_MUL, SDL_Surface::format, i, NULL, rect, SDL_PixelFormat::Rmask, SDL_BlendFillRect_ARGB8888(), SDL_BlendFillRect_RGB(), SDL_BlendFillRect_RGB555(), SDL_BlendFillRect_RGB565(), SDL_BlendFillRect_RGB888(), SDL_BlendFillRect_RGBA(), SDL_BLENDMODE_ADD, SDL_BLENDMODE_BLEND, SDL_IntersectRect, and SDL_SetError.

Referenced by SW_RenderFillRects().

{
    SDL_Rect rect;
    int i;
    int (*func)(SDL_Surface * dst, const SDL_Rect * rect,
                SDL_BlendMode blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a) = NULL;
    int status = 0;

    if (!dst) {
        return SDL_SetError("Passed NULL destination surface");
    }

    /* This function doesn't work on surfaces < 8 bpp */
    if (dst->format->BitsPerPixel < 8) {
        return SDL_SetError("SDL_BlendFillRects(): Unsupported surface format");
    }

    if (blendMode == SDL_BLENDMODE_BLEND || blendMode == SDL_BLENDMODE_ADD) {
        r = DRAW_MUL(r, a);
        g = DRAW_MUL(g, a);
        b = DRAW_MUL(b, a);
    }

    /* FIXME: Does this function pointer slow things down significantly? */
    switch (dst->format->BitsPerPixel) {
    case 15:
        switch (dst->format->Rmask) {
        case 0x7C00:
            func = SDL_BlendFillRect_RGB555;
        }
        break;
    case 16:
        switch (dst->format->Rmask) {
        case 0xF800:
            func = SDL_BlendFillRect_RGB565;
        }
        break;
    case 32:
        switch (dst->format->Rmask) {
        case 0x00FF0000:
            if (!dst->format->Amask) {
                func = SDL_BlendFillRect_RGB888;
            } else {
                func = SDL_BlendFillRect_ARGB8888;
            }
            break;
        }
        break;
    default:
        break;
    }

    if (!func) {
        if (!dst->format->Amask) {
            func = SDL_BlendFillRect_RGB;
        } else {
            func = SDL_BlendFillRect_RGBA;
        }
    }

    for (i = 0; i < count; ++i) {
        /* Perform clipping */
        if (!SDL_IntersectRect(&rects[i], &dst->clip_rect, &rect)) {
            continue;
        }
        status = func(dst, &rect, blendMode, r, g, b, a);
    }
    return status;
}