This repository has been archived by the owner on Feb 11, 2021. It is now read-only.
SDL_fillrect.c
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Simple DirectMedia Layer
Copyright (C) 1997-2011 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.
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*/
#include "SDL_config.h"
#include "SDL_video.h"
#include "SDL_blit.h"
#ifdef __SSE__
/* *INDENT-OFF* */
#ifdef _MSC_VER
#define SSE_BEGIN \
__m128 c128; \
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c128.m128_u32[0] = color; \
c128.m128_u32[1] = color; \
c128.m128_u32[2] = color; \
c128.m128_u32[3] = color;
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#else
#define SSE_BEGIN \
DECLARE_ALIGNED(Uint32, cccc[4], 16); \
cccc[0] = color; \
cccc[1] = color; \
cccc[2] = color; \
cccc[3] = color; \
__m128 c128 = *(__m128 *)cccc;
#endif
#define SSE_WORK \
for (i = n / 64; i--;) { \
_mm_stream_ps((float *)(p+0), c128); \
_mm_stream_ps((float *)(p+16), c128); \
_mm_stream_ps((float *)(p+32), c128); \
_mm_stream_ps((float *)(p+48), c128); \
p += 64; \
}
#define SSE_END
#define DEFINE_SSE_FILLRECT(bpp, type) \
static void \
SDL_FillRect##bpp##SSE(Uint8 *pixels, int pitch, Uint32 color, int w, int h) \
{ \
SSE_BEGIN; \
\
while (h--) { \
int i, n = w * bpp; \
Uint8 *p = pixels; \
\
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if (n > 63) { \
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int adjust = 16 - ((uintptr_t)p & 15); \
if (adjust < 16) { \
n -= adjust; \
adjust /= bpp; \
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while (adjust--) { \
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*((type *)p) = (type)color; \
p += bpp; \
} \
} \
SSE_WORK; \
} \
if (n & 63) { \
int remainder = (n & 63); \
remainder /= bpp; \
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while (remainder--) { \
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*((type *)p) = (type)color; \
p += bpp; \
} \
} \
pixels += pitch; \
} \
\
SSE_END; \
}
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static void
SDL_FillRect1SSE(Uint8 *pixels, int pitch, Uint32 color, int w, int h)
{
SSE_BEGIN;
while (h--) {
int i, n = w;
Uint8 *p = pixels;
if (n > 63) {
int adjust = 16 - ((uintptr_t)p & 15);
if (adjust) {
n -= adjust;
SDL_memset(p, color, adjust);
p += adjust;
}
SSE_WORK;
}
if (n & 63) {
int remainder = (n & 63);
SDL_memset(p, color, remainder);
p += remainder;
}
pixels += pitch;
}
SSE_END;
}
/*DEFINE_SSE_FILLRECT(1, Uint8)*/
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DEFINE_SSE_FILLRECT(2, Uint16)
DEFINE_SSE_FILLRECT(4, Uint32)
/* *INDENT-ON* */
#endif /* __SSE__ */
#ifdef __MMX__
/* *INDENT-OFF* */
#define MMX_BEGIN \
__m64 c64 = _mm_set_pi32(color, color)
#define MMX_WORK \
for (i = n / 64; i--;) { \
_mm_stream_pi((__m64 *)(p+0), c64); \
_mm_stream_pi((__m64 *)(p+8), c64); \
_mm_stream_pi((__m64 *)(p+16), c64); \
_mm_stream_pi((__m64 *)(p+24), c64); \
_mm_stream_pi((__m64 *)(p+32), c64); \
_mm_stream_pi((__m64 *)(p+40), c64); \
_mm_stream_pi((__m64 *)(p+48), c64); \
_mm_stream_pi((__m64 *)(p+56), c64); \
p += 64; \
}
#define MMX_END \
_mm_empty()
#define DEFINE_MMX_FILLRECT(bpp, type) \
static void \
SDL_FillRect##bpp##MMX(Uint8 *pixels, int pitch, Uint32 color, int w, int h) \
{ \
MMX_BEGIN; \
\
while (h--) { \
int i, n = w * bpp; \
Uint8 *p = pixels; \
\
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if (n > 63) { \
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int adjust = 8 - ((uintptr_t)p & 7); \
if (adjust < 8) { \
n -= adjust; \
adjust /= bpp; \
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while (adjust--) { \
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*((type *)p) = (type)color; \
p += bpp; \
} \
} \
MMX_WORK; \
} \
if (n & 63) { \
int remainder = (n & 63); \
remainder /= bpp; \
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while (remainder--) { \
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*((type *)p) = (type)color; \
p += bpp; \
} \
} \
pixels += pitch; \
} \
\
MMX_END; \
}
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static void
SDL_FillRect1MMX(Uint8 *pixels, int pitch, Uint32 color, int w, int h)
{
MMX_BEGIN;
while (h--) {
int i, n = w;
Uint8 *p = pixels;
if (n > 63) {
int adjust = 8 - ((uintptr_t)p & 7);
if (adjust) {
n -= adjust;
SDL_memset(p, color, adjust);
p += adjust;
}
MMX_WORK;
}
if (n & 63) {
int remainder = (n & 63);
SDL_memset(p, color, remainder);
p += remainder;
}
pixels += pitch;
}
MMX_END;
}
/*DEFINE_MMX_FILLRECT(1, Uint8)*/
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DEFINE_MMX_FILLRECT(2, Uint16)
DEFINE_MMX_FILLRECT(4, Uint32)
/* *INDENT-ON* */
#endif /* __MMX__ */
static void
SDL_FillRect1(Uint8 * pixels, int pitch, Uint32 color, int w, int h)
{
while (h--) {
int n = w;
Uint8 *p = pixels;
if (n > 3) {
switch ((uintptr_t) p & 3) {
case 1:
*p++ = (Uint8) color;
--n;
case 2:
*p++ = (Uint8) color;
--n;
case 3:
*p++ = (Uint8) color;
--n;
}
SDL_memset4(p, color, (n >> 2));
}
if (n & 3) {
p += (n & ~3);
switch (n & 3) {
case 3:
*p++ = (Uint8) color;
case 2:
*p++ = (Uint8) color;
case 1:
*p++ = (Uint8) color;
}
}
pixels += pitch;
}
}
static void
SDL_FillRect2(Uint8 * pixels, int pitch, Uint32 color, int w, int h)
{
while (h--) {
int n = w;
Uint16 *p = (Uint16 *) pixels;
if (n > 1) {
if ((uintptr_t) p & 2) {
*p++ = (Uint16) color;
--n;
}
SDL_memset4(p, color, (n >> 1));
}
if (n & 1) {
p[n - 1] = (Uint16) color;
}
pixels += pitch;
}
}
static void
SDL_FillRect3(Uint8 * pixels, int pitch, Uint32 color, int w, int h)
{
Uint8 r = (Uint8) ((color >> 16) & 0xFF);
Uint8 g = (Uint8) ((color >> 8) & 0xFF);
Uint8 b = (Uint8) (color & 0xFF);
while (h--) {
int n = w;
Uint8 *p = pixels;
while (n--) {
*p++ = r;
*p++ = g;
*p++ = b;
}
pixels += pitch;
}
}
static void
SDL_FillRect4(Uint8 * pixels, int pitch, Uint32 color, int w, int h)
{
while (h--) {
SDL_memset4(pixels, color, w);
pixels += pitch;
}
}
/*
* This function performs a fast fill of the given rectangle with 'color'
*/
int
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SDL_FillRect(SDL_Surface * dst, const SDL_Rect * rect, Uint32 color)
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SDL_Rect clipped;
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Uint8 *pixels;
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if (!dst) {
SDL_SetError("Passed NULL destination surface");
return -1;
}
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/* This function doesn't work on surfaces < 8 bpp */
if (dst->format->BitsPerPixel < 8) {
SDL_SetError("SDL_FillRect(): Unsupported surface format");
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/* If 'rect' == NULL, then fill the whole surface */
if (rect) {
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/* Perform clipping */
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if (!SDL_IntersectRect(rect, &dst->clip_rect, &clipped)) {
return 0;
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rect = &clipped;
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} else {
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rect = &dst->clip_rect;
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}
/* Perform software fill */
if (!dst->pixels) {
SDL_SetError("SDL_FillRect(): You must lock the surface");
return (-1);
}
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pixels = (Uint8 *) dst->pixels + rect->y * dst->pitch +
rect->x * dst->format->BytesPerPixel;
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switch (dst->format->BytesPerPixel) {
case 1:
{
color |= (color << 8);
color |= (color << 16);
#ifdef __SSE__
if (SDL_HasSSE()) {
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SDL_FillRect1SSE(pixels, dst->pitch, color, rect->w, rect->h);
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break;
}
#endif
#ifdef __MMX__
if (SDL_HasMMX()) {
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SDL_FillRect1MMX(pixels, dst->pitch, color, rect->w, rect->h);
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break;
}
#endif
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SDL_FillRect1(pixels, dst->pitch, color, rect->w, rect->h);
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break;
}
case 2:
{
color |= (color << 16);
#ifdef __SSE__
if (SDL_HasSSE()) {
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SDL_FillRect2SSE(pixels, dst->pitch, color, rect->w, rect->h);
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break;
}
#endif
#ifdef __MMX__
if (SDL_HasMMX()) {
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SDL_FillRect2MMX(pixels, dst->pitch, color, rect->w, rect->h);
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break;
}
#endif
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SDL_FillRect2(pixels, dst->pitch, color, rect->w, rect->h);
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break;
}
case 3:
/* 24-bit RGB is a slow path, at least for now. */
{
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SDL_FillRect3(pixels, dst->pitch, color, rect->w, rect->h);
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break;
}
case 4:
{
#ifdef __SSE__
if (SDL_HasSSE()) {
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SDL_FillRect4SSE(pixels, dst->pitch, color, rect->w, rect->h);
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break;
}
#endif
#ifdef __MMX__
if (SDL_HasMMX()) {
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SDL_FillRect4MMX(pixels, dst->pitch, color, rect->w, rect->h);
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break;
}
#endif
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SDL_FillRect4(pixels, dst->pitch, color, rect->w, rect->h);
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break;
}
}
/* We're done! */
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return 0;
}
int
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SDL_FillRects(SDL_Surface * dst, const SDL_Rect * rects, int count,
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Uint32 color)
{
int i;
int status = 0;
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if (!rects) {
SDL_SetError("SDL_FillRects() passed NULL rects");
return -1;
}
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for (i = 0; i < count; ++i) {
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status += SDL_FillRect(dst, &rects[i], color);
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}
return status;
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}
/* vi: set ts=4 sw=4 expandtab: */