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Copyright (c) 2013-2020 Ramon Santamaria (@raysan5)
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This software is provided "as-is", without any express or implied warranty. In no event
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will the authors be held liable for any damages arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose, including commercial
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applications, and to alter it and redistribute it freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not claim that you
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wrote the original software. If you use this software in a product, an acknowledgment
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in the product documentation would be appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be misrepresented
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as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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# RaylibSIMD
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Toy re-implementations of some of the software image routines in Raylib using the SSE instruction set for my learning purposes.
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To test it out, copy `RaylibSIMD.h` into Raylib's folder and in `textures.c` after all the file includes, include and enable the single header file.
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```
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#define RAYLIB_SIMD_IMPLEMENTATION
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#include "RaylibSIMD.h"
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```
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#ifndef RAYLIB_SIMD_H
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#define RAYLIB_SIMD_H
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#if defined(__cplusplus)
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extern "C" {
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#endif
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RLAPI void RaylibSIMD_ImageDraw (Image *dst, Image src, Rectangle srcRec, Rectangle dstRec, Color tint);
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RLAPI Image RaylibSIMD_GenImageColor (int width, int height, Color color);
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RLAPI void RaylibSIMD_ImageDrawRectangleRec(Image *dst, Rectangle rec, Color color);
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RLAPI void RaylibSIMD_ImageDrawRectangle (Image *dst, int posX, int posY, int width, int height, Color color);
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RLAPI void RaylibSIMD_ImageClearBackground (Image *dst, Color color);
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#if defined(__cplusplus)
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}
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#endif // extern "C"
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#endif // RAYLIB_SIMD_H
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#ifdef RAYLIB_SIMD_IMPLEMENTATION
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#include <stdint.h>
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#if defined(_MSC_VER)
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#define RS_COMPILER_MSVC
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#elif defined(__clang__)
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#define RS_COMPILER_CLANG
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#elif defined(__GNUC__)
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#define RS_COMPILER_GCC
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#endif
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#ifdef RS_COMPILER_MSVC
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#include <intrin.h>
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#elif defined(RS_COMPILER_CLANG) || defined(RS_COMPILER_GCC)
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#include <x86intrin.h>
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#else
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#error "SIMD Implementation Required"
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#endif
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#define RS_MAX(a, b) ((a) > (b) ? (a) : (b))
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#define RS_CAST(x) (x)
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void RaylibSIMD__SoftwareBlendPixel(unsigned char const *src_ptr, unsigned char *dest_ptr, Color tint, float src_alpha_min)
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{
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float const INV_255 = 1.f / 255.f;
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uint32_t src_pixel = *RS_CAST(uint32_t *)src_ptr;
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uint32_t dest_pixel = *RS_CAST(uint32_t *)dest_ptr;
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float src_r = RS_CAST(float)((src_pixel >> 0) & 0xFF);
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float src_g = RS_CAST(float)((src_pixel >> 8) & 0xFF);
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float src_b = RS_CAST(float)((src_pixel >> 16) & 0xFF);
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float src_a = RS_CAST(float)((src_pixel >> 24) & 0xFF);
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src_a = RS_MAX(src_a, src_alpha_min);
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float dest_r = RS_CAST(float)((dest_pixel >> 0) & 0xFF);
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float dest_g = RS_CAST(float)((dest_pixel >> 8) & 0xFF);
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float dest_b = RS_CAST(float)((dest_pixel >> 16) & 0xFF);
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float dest_a = RS_CAST(float)((dest_pixel >> 24) & 0xFF);
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float src_r01 = src_r * INV_255;
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float src_g01 = src_g * INV_255;
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float src_b01 = src_b * INV_255;
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float src_a01 = src_a * INV_255;
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float tint_r01 = tint.r * INV_255;
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float tint_g01 = tint.g * INV_255;
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float tint_b01 = tint.b * INV_255;
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float tint_a01 = tint.a * INV_255;
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float src_tint_r01 = tint_r01 * src_r01;
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float src_tint_g01 = tint_g01 * src_g01;
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float src_tint_b01 = tint_b01 * src_b01;
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float src_tint_a01 = tint_a01 * src_a01;
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float dest_r01 = dest_r * INV_255;
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float dest_g01 = dest_g * INV_255;
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float dest_b01 = dest_b * INV_255;
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float dest_a01 = dest_a * INV_255;
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float blend_a01 = src_tint_a01 + dest_a01 * (1.0f - src_tint_a01);
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float inv_blend_a01 = 1.f / blend_a01;
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float blend_r01 = ((src_tint_r01 * src_tint_a01) + (dest_r01 * dest_a01 * (1.f - src_tint_a01))) * inv_blend_a01;
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float blend_g01 = ((src_tint_g01 * src_tint_a01) + (dest_g01 * dest_a01 * (1.f - src_tint_a01))) * inv_blend_a01;
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float blend_b01 = ((src_tint_b01 * src_tint_a01) + (dest_b01 * dest_a01 * (1.f - src_tint_a01))) * inv_blend_a01;
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float blend_a = blend_a01 * 255.f;
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float blend_r = blend_r01 * 255.f;
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float blend_g = blend_g01 * 255.f;
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float blend_b = blend_b01 * 255.f;
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unsigned char blend_r255 = RS_CAST(unsigned char)blend_r;
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unsigned char blend_g255 = RS_CAST(unsigned char)blend_g;
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unsigned char blend_b255 = RS_CAST(unsigned char)blend_b;
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unsigned char blend_a255 = RS_CAST(unsigned char)blend_a;
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uint32_t blend_pixel = (RS_CAST(uint32_t)blend_r255 & 0xFF) << 0 |
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(RS_CAST(uint32_t)blend_g255 & 0xFF) << 8 |
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(RS_CAST(uint32_t)blend_b255 & 0xFF) << 16 |
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(RS_CAST(uint32_t)blend_a255 & 0xFF) << 24;
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*(RS_CAST(uint32_t *)dest_ptr) = blend_pixel;
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}
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typedef enum
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{
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RaylibSIMD_ImageDrawMode_Original,
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RaylibSIMD_ImageDrawMode_Flattened,
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RaylibSIMD_ImageDrawMode_SIMD,
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} RaylibSIMD_ImageDrawMode;
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void RaylibSIMD_ImageDraw(Image *dst, Image src, Rectangle srcRec, Rectangle dstRec, Color tint)
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{
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// Security check to avoid program crash
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if ((dst->data == NULL) || (dst->width == 0) || (dst->height == 0) ||
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(src.data == NULL) || (src.width == 0) || (src.height == 0)) return;
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if (dst->mipmaps > 1)
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{
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TRACELOG(LOG_WARNING, "Image drawing only applied to base mipmap level");
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}
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if (dst->format >= COMPRESSED_DXT1_RGB)
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{
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TRACELOG(LOG_WARNING, "Image drawing not supported for compressed formats");
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}
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else
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{
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Image srcMod = { 0 }; // Source copy (in case it was required)
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Image *srcPtr = &src; // Pointer to source image
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bool useSrcMod = false; // Track source copy required
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// Source rectangle out-of-bounds security checks
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if (srcRec.x < 0) { srcRec.width += srcRec.x; srcRec.x = 0; }
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if (srcRec.y < 0) { srcRec.height += srcRec.y; srcRec.y = 0; }
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if ((srcRec.x + srcRec.width) > src.width) srcRec.width = src.width - srcRec.x;
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if ((srcRec.y + srcRec.height) > src.height) srcRec.height = src.height - srcRec.y;
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// Check if source rectangle needs to be resized to destination rectangle
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// In that case, we make a copy of source and we apply all required transform
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if (((int)srcRec.width != (int)dstRec.width) || ((int)srcRec.height != (int)dstRec.height))
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{
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srcMod = ImageFromImage(src, srcRec); // Create image from another image
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ImageResize(&srcMod, (int)dstRec.width, (int)dstRec.height); // Resize to destination rectangle
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srcRec = (Rectangle){ 0.f, 0.f, (float)srcMod.width, (float)srcMod.height };
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srcPtr = &srcMod;
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useSrcMod = true;
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}
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// Destination rectangle out-of-bounds security checks
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if (dstRec.x < 0)
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{
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srcRec.x = -dstRec.x;
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srcRec.width += dstRec.x;
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dstRec.x = 0;
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}
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else if ((dstRec.x + srcRec.width) > dst->width) srcRec.width = dst->width - dstRec.x;
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if (dstRec.y < 0)
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{
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srcRec.y = -dstRec.y;
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srcRec.height += dstRec.y;
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dstRec.y = 0;
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}
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else if ((dstRec.y + srcRec.height) > dst->height) srcRec.height = dst->height - dstRec.y;
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if (dst->width < srcRec.width) srcRec.width = (float)dst->width;
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if (dst->height < srcRec.height) srcRec.height = (float)dst->height;
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// This blitting method is quite fast! The process followed is:
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// for every pixel -> [get_src_format/get_dst_format -> blend -> format_to_dst]
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// Some optimization ideas:
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// [x] Avoid creating source copy if not required (no resize required)
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// [x] Optimize ImageResize() for pixel format (alternative: ImageResizeNN())
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// [x] Optimize ColorAlphaBlend() to avoid processing (alpha = 0) and (alpha = 1)
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// [x] Optimize ColorAlphaBlend() for faster operations (maybe avoiding divs?)
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// [x] Consider fast path: no alpha blending required cases (src has no alpha)
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// [x] Consider fast path: same src/dst format with no alpha -> direct line copy
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// [-] GetPixelColor(): Return Vector4 instead of Color, easier for ColorAlphaBlend()
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bool blendRequired = true;
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// Fast path: Avoid blend if source has no alpha to blend
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if ((tint.a == 255) && ((srcPtr->format == UNCOMPRESSED_GRAYSCALE) || (srcPtr->format == UNCOMPRESSED_R8G8B8) || (srcPtr->format == UNCOMPRESSED_R5G6B5))) blendRequired = false;
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int strideDst = GetPixelDataSize(dst->width, 1, dst->format);
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int bytesPerPixelDst = strideDst/(dst->width);
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int strideSrc = GetPixelDataSize(srcPtr->width, 1, srcPtr->format);
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int bytesPerPixelSrc = strideSrc/(srcPtr->width);
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unsigned char *pSrcBase = (unsigned char *)srcPtr->data + ((int)srcRec.y*srcPtr->width + (int)srcRec.x)*bytesPerPixelSrc;
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unsigned char *pDstBase = (unsigned char *)dst->data + ((int)dstRec.y*dst->width + (int)dstRec.x)*bytesPerPixelDst;
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float const INV_255 = 1.f / 255.f;
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RaylibSIMD_ImageDrawMode draw_mode = RaylibSIMD_ImageDrawMode_Original;
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if (dst->format == UNCOMPRESSED_R8G8B8A8 &&
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(srcPtr->format == UNCOMPRESSED_R8G8B8A8 || srcPtr->format == UNCOMPRESSED_R8G8B8))
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{
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draw_mode = RaylibSIMD_ImageDrawMode_SIMD;
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}
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switch(draw_mode)
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{
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case RaylibSIMD_ImageDrawMode_Original:
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{
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Color colSrc, colDst, blend;
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for (int y = 0; y < (int)srcRec.height; y++)
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{
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unsigned char *pSrc = pSrcBase;
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unsigned char *pDst = pDstBase;
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// Fast path: Avoid moving pixel by pixel if no blend required and same format
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if (!blendRequired && (srcPtr->format == dst->format)) memcpy(pDst, pSrc, (size_t)srcRec.width*bytesPerPixelSrc);
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else
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{
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for (int x = 0; x < (int)srcRec.width; x++)
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{
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colSrc = GetPixelColor(pSrc, srcPtr->format);
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colDst = GetPixelColor(pDst, dst->format);
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// Fast path: Avoid blend if source has no alpha to blend
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if (blendRequired) blend = ColorAlphaBlend(colDst, colSrc, tint);
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else blend = colSrc;
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SetPixelColor(pDst, blend, dst->format);
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pDst += bytesPerPixelDst;
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pSrc += bytesPerPixelSrc;
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}
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}
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pSrcBase += strideSrc;
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pDstBase += strideDst;
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}
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}
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break;
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case RaylibSIMD_ImageDrawMode_Flattened:
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{
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unsigned char *src_row = RS_CAST(unsigned char *)pSrcBase;
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unsigned char *dest_row = RS_CAST(unsigned char *)pDstBase;
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float const src_alpha_min = (srcPtr->format == UNCOMPRESSED_R8G8B8) ? 255.f : 0.f;
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||||
|
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for (int y = 0; y < (int)srcRec.height; y++)
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{
|
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unsigned char *src_ptr = src_row;
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unsigned char *dest_ptr = dest_row;
|
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for (int x = 0; x < (int)srcRec.width; x++)
|
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{
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RaylibSIMD__SoftwareBlendPixel(src_ptr, dest_ptr, tint, src_alpha_min);
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||||
}
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|
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src_row += strideSrc;
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dest_row += strideDst;
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||||
}
|
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|
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}
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break;
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case RaylibSIMD_ImageDrawMode_SIMD:
|
||||
{
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__m128 const inv_255_4x = _mm_set1_ps(INV_255);
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__m128 const tint_r01_4x = _mm_set1_ps(tint.r * INV_255);
|
||||
__m128 const tint_g01_4x = _mm_set1_ps(tint.g * INV_255);
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__m128 const tint_b01_4x = _mm_set1_ps(tint.b * INV_255);
|
||||
__m128 const tint_a01_4x = _mm_set1_ps(tint.a * INV_255);
|
||||
__m128 const one_4x = _mm_set1_ps(1.f);
|
||||
__m128 const u255_4x = _mm_set1_ps(255.f);
|
||||
__m128i const hex_0xFF_4x = _mm_set1_epi32(0xFF);
|
||||
|
||||
float src_alpha_min = 0.f;
|
||||
__m128i src_pixels_shuffle = _mm_set_epi8(15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0); // No-op shuffle.
|
||||
if (srcPtr->format == UNCOMPRESSED_R8G8B8)
|
||||
{
|
||||
// NOTE: We load 4 pixels x 4 colors at a time. But if the
|
||||
// source image is 3BPP, then the 4th color loaded in each
|
||||
// pixel is going to be the RED component of the next pixel.
|
||||
//
|
||||
// Pixels[] = {RGB, RGB, RGB, RGB, ...}
|
||||
//
|
||||
// For example, naively loading the next 4 color components
|
||||
// in a 3BPP byte stream, produces
|
||||
//
|
||||
// RGBR GBRG BRGB
|
||||
//
|
||||
// The subsequent pixel needs to re-load the red channel
|
||||
// to correctly pull the RGB components out and so forth for
|
||||
// subsequent pixels.
|
||||
//
|
||||
// RGBR RGBR RGBR
|
||||
//
|
||||
// We do this by shuffling the loaded pixels into place. In
|
||||
// the 4BPP case, we do a no-op shuffle that preserves
|
||||
// positions of all color components to avoid branches in
|
||||
// the blitting hot path.
|
||||
src_alpha_min = 255.f;
|
||||
src_pixels_shuffle = _mm_set_epi8(12, 11, 10, 9, 9, 8, 7, 6, 6, 5, 4, 3, 3, 2, 1, 0);
|
||||
}
|
||||
|
||||
int const SIMD_WIDTH = 4;
|
||||
__m128 const src_alpha_min_4x = _mm_set1_ps(src_alpha_min);
|
||||
int simd_x_iterations = RS_CAST(int)srcRec.width / SIMD_WIDTH;
|
||||
int remaining_x_iterations = RS_CAST(int)srcRec.width % SIMD_WIDTH;
|
||||
|
||||
unsigned char const *src_row = RS_CAST(unsigned char const *)pSrcBase;
|
||||
unsigned char *dest_row = RS_CAST(unsigned char *)pDstBase;
|
||||
for (int y = 0; y < (int)srcRec.height; y++)
|
||||
{
|
||||
unsigned char *src_ptr = src_row;
|
||||
unsigned char *dest_ptr = dest_row;
|
||||
for (int x = 0; x < simd_x_iterations; x++)
|
||||
{
|
||||
unsigned char *dest = dest_ptr;
|
||||
|
||||
// NOTE: Extract Pixels From Buffer
|
||||
__m128i src_pixels_4x = _mm_loadu_si128((__m128i *)src_ptr);
|
||||
__m128i dest_pixels_4x = _mm_loadu_si128((__m128i *)dest_ptr);
|
||||
__m128i src_pixels_4x_shuffled = _mm_shuffle_epi8(src_pixels_4x, src_pixels_shuffle);
|
||||
|
||||
// NOTE: Advance Pixel Buffer
|
||||
src_ptr += (SIMD_WIDTH * bytesPerPixelSrc);
|
||||
dest_ptr += (SIMD_WIDTH * bytesPerPixelDst);
|
||||
|
||||
// NOTE: Unpack Source & Dest Pixel Layout for SIMD
|
||||
// From {RGBA0, RGBA1, RGBA2, RGBA3} to {RRRR} {GGGG} {BBBB} {AAAA} where each
|
||||
// new {...} is one SIMD register with u32x4 lanes of the same color component.
|
||||
//
|
||||
// 1. Shift colour component to lowest 8 bits
|
||||
// 2. Isolate the color component
|
||||
//
|
||||
__m128i src0123_r_int = _mm_and_si128(_mm_srli_epi32(src_pixels_4x_shuffled, 0), hex_0xFF_4x);
|
||||
__m128i src0123_g_int = _mm_and_si128(_mm_srli_epi32(src_pixels_4x_shuffled, 8), hex_0xFF_4x);
|
||||
__m128i src0123_b_int = _mm_and_si128(_mm_srli_epi32(src_pixels_4x_shuffled, 16), hex_0xFF_4x);
|
||||
__m128i src0123_a_int = _mm_and_si128(_mm_srli_epi32(src_pixels_4x_shuffled, 24), hex_0xFF_4x);
|
||||
|
||||
__m128i dest0123_r_int = _mm_and_si128(_mm_srli_epi32(dest_pixels_4x, 0), hex_0xFF_4x);
|
||||
__m128i dest0123_g_int = _mm_and_si128(_mm_srli_epi32(dest_pixels_4x, 8), hex_0xFF_4x);
|
||||
__m128i dest0123_b_int = _mm_and_si128(_mm_srli_epi32(dest_pixels_4x, 16), hex_0xFF_4x);
|
||||
__m128i dest0123_a_int = _mm_and_si128(_mm_srli_epi32(dest_pixels_4x, 24), hex_0xFF_4x);
|
||||
|
||||
// NOTE: Convert to SIMD f32x4
|
||||
__m128 src0123_r = _mm_cvtepi32_ps(src0123_r_int);
|
||||
__m128 src0123_g = _mm_cvtepi32_ps(src0123_g_int);
|
||||
__m128 src0123_b = _mm_cvtepi32_ps(src0123_b_int);
|
||||
__m128 src0123_a = _mm_cvtepi32_ps(src0123_a_int);
|
||||
|
||||
// NOTE: For 3BPP Images the src_alpha_min_4x is set to 255 to completely overwrite dest.
|
||||
// For 4BPP Images the src_alpha_min_4x is set to 0 (i.e. no-op)
|
||||
src0123_a = _mm_max_ps(src0123_a, src_alpha_min_4x);
|
||||
|
||||
__m128 dest0123_r = _mm_cvtepi32_ps(dest0123_r_int);
|
||||
__m128 dest0123_g = _mm_cvtepi32_ps(dest0123_g_int);
|
||||
__m128 dest0123_b = _mm_cvtepi32_ps(dest0123_b_int);
|
||||
__m128 dest0123_a = _mm_cvtepi32_ps(dest0123_a_int);
|
||||
|
||||
// NOTE: Source Pixels to Normalized [0, 1] Float Space
|
||||
__m128 src0123_r01 = _mm_mul_ps(src0123_r, inv_255_4x);
|
||||
__m128 src0123_g01 = _mm_mul_ps(src0123_g, inv_255_4x);
|
||||
__m128 src0123_b01 = _mm_mul_ps(src0123_b, inv_255_4x);
|
||||
__m128 src0123_a01 = _mm_mul_ps(src0123_a, inv_255_4x);
|
||||
|
||||
// NOTE: Tint Source Pixels
|
||||
__m128 src0123_tinted_r01 = _mm_mul_ps(src0123_r01, tint_r01_4x);
|
||||
__m128 src0123_tinted_g01 = _mm_mul_ps(src0123_g01, tint_g01_4x);
|
||||
__m128 src0123_tinted_b01 = _mm_mul_ps(src0123_b01, tint_b01_4x);
|
||||
__m128 src0123_tinted_a01 = _mm_mul_ps(src0123_a01, tint_a01_4x);
|
||||
|
||||
// NOTE: Dest Pixels to Normalized [0, 1] Float Space
|
||||
__m128 dest0123_r01 = _mm_mul_ps(dest0123_r, inv_255_4x);
|
||||
__m128 dest0123_g01 = _mm_mul_ps(dest0123_g, inv_255_4x);
|
||||
__m128 dest0123_b01 = _mm_mul_ps(dest0123_b, inv_255_4x);
|
||||
__m128 dest0123_a01 = _mm_mul_ps(dest0123_a, inv_255_4x);
|
||||
|
||||
// NOTE: Porter Duff Blend
|
||||
// NOTE: Blend Alpha
|
||||
// i.e. blend_a = src_a + (dest_a * (1 - src_a))
|
||||
__m128 blend0123_a01 = _mm_add_ps(src0123_tinted_a01, _mm_mul_ps(dest0123_a01, _mm_sub_ps(one_4x, src0123_tinted_a01)));
|
||||
__m128 inv_blend0123_a01 = _mm_div_ps(one_4x, blend0123_a01);
|
||||
|
||||
// NOTE: Blend Colors
|
||||
// i.e. blend_r = ((src_r * a) + (dest_r * dest_a * (1.f - src_a))) / blend_a;
|
||||
__m128 blend0123_r01 = _mm_mul_ps(_mm_add_ps(_mm_mul_ps(src0123_tinted_r01, src0123_tinted_a01), _mm_mul_ps(dest0123_r01, _mm_mul_ps(dest0123_a01, _mm_sub_ps(one_4x, src0123_tinted_a01)))), inv_blend0123_a01);
|
||||
__m128 blend0123_g01 = _mm_mul_ps(_mm_add_ps(_mm_mul_ps(src0123_tinted_g01, src0123_tinted_a01), _mm_mul_ps(dest0123_g01, _mm_mul_ps(dest0123_a01, _mm_sub_ps(one_4x, src0123_tinted_a01)))), inv_blend0123_a01);
|
||||
__m128 blend0123_b01 = _mm_mul_ps(_mm_add_ps(_mm_mul_ps(src0123_tinted_b01, src0123_tinted_a01), _mm_mul_ps(dest0123_b01, _mm_mul_ps(dest0123_a01, _mm_sub_ps(one_4x, src0123_tinted_a01)))), inv_blend0123_a01);
|
||||
|
||||
// NOTE: Convert Blend to [0, 255] F32 Space
|
||||
__m128 blend0123_a = _mm_mul_ps(blend0123_a01, u255_4x);
|
||||
__m128 blend0123_r = _mm_mul_ps(blend0123_r01, u255_4x);
|
||||
__m128 blend0123_g = _mm_mul_ps(blend0123_g01, u255_4x);
|
||||
__m128 blend0123_b = _mm_mul_ps(blend0123_b01, u255_4x);
|
||||
|
||||
// NOTE: Convert Blend to [0, 255] Integer Space
|
||||
__m128i blended0123_a_int = _mm_cvtps_epi32(blend0123_a);
|
||||
__m128i blended0123_r_int = _mm_cvtps_epi32(blend0123_r);
|
||||
__m128i blended0123_g_int = _mm_cvtps_epi32(blend0123_g);
|
||||
__m128i blended0123_b_int = _mm_cvtps_epi32(blend0123_b);
|
||||
|
||||
// NOTE: Repack The Pixel
|
||||
// From {RRRR} {GGGG} {BBBB} {AAAA} to {RGBA RGBA RGBA RGBA}
|
||||
// i.e. blended0123_r_int = {[0,0,0,R], [0,0,0,R], [0,0,0,R], [0,0,0,R]}
|
||||
// blended0123_g_int = {[0,0,0,G], [0,0,0,G], [0,0,0,G], [0,0,0,G]}
|
||||
// ....
|
||||
//
|
||||
// Each blend has the color component converted to 8 bits sitting in the low bits of the register.
|
||||
// Shift the colors into place and or them together to get the final output
|
||||
// pixel0123 = {[R,G,B,A], [R,G,B,A], [R,G,B,A], [R,G,B,A]}
|
||||
//
|
||||
__m128i pixel0123 =
|
||||
_mm_or_si128(blended0123_r_int,
|
||||
_mm_or_si128(_mm_or_si128(_mm_slli_epi32(blended0123_g_int, 8),
|
||||
_mm_slli_epi32(blended0123_b_int, 16)),
|
||||
_mm_slli_epi32(blended0123_a_int, 24)));
|
||||
_mm_storeu_si128((__m128i *)dest, pixel0123);
|
||||
}
|
||||
|
||||
// NOTE: Remaining iterations are done serially.
|
||||
for (int x = 0; x < remaining_x_iterations; x++)
|
||||
{
|
||||
RaylibSIMD__SoftwareBlendPixel(src_ptr, dest_ptr, tint, src_alpha_min);
|
||||
src_ptr += bytesPerPixelSrc;
|
||||
dest_ptr += bytesPerPixelDst;
|
||||
}
|
||||
|
||||
src_row += strideSrc;
|
||||
dest_row += strideDst;
|
||||
}
|
||||
|
||||
}
|
||||
}
|
||||
|
||||
if (useSrcMod) UnloadImage(srcMod); // Unload source modified image
|
||||
}
|
||||
}
|
||||
|
||||
Image RaylibSIMD_GenImageColor(int width, int height, Color color)
|
||||
{
|
||||
Color *pixels = (Color *)RL_CALLOC(width*height, sizeof(Color));
|
||||
int num_pixels = width * height;
|
||||
int simd_iterations = num_pixels / 4;
|
||||
int remaining_iterations = num_pixels % 4;
|
||||
|
||||
__m128i *dest_4x = RS_CAST(__m128i *) pixels;
|
||||
uint32_t color_u32 = (RS_CAST(uint32_t)color.r << 0) | (RS_CAST(uint32_t)color.g << 8) | (RS_CAST(uint32_t)color.b << 16) | (RS_CAST(uint32_t)color.a << 24);
|
||||
__m128i color_u32_4x = _mm_set1_epi32(color_u32);
|
||||
for (int i = 0; i < simd_iterations; i++)
|
||||
{
|
||||
_mm_store_si128(dest_4x, color_u32_4x);
|
||||
dest_4x++;
|
||||
}
|
||||
|
||||
uint32_t *dest = RS_CAST(uint32_t *)dest_4x;
|
||||
for (int i = 0; i < remaining_iterations; i++)
|
||||
*dest++ = color_u32;
|
||||
|
||||
Image image = {0};
|
||||
image.data = pixels;
|
||||
image.width = width;
|
||||
image.height = height;
|
||||
image.format = UNCOMPRESSED_R8G8B8A8;
|
||||
image.mipmaps = 1;
|
||||
return image;
|
||||
}
|
||||
|
||||
// Draw rectangle within an image
|
||||
void RaylibSIMD_ImageDrawRectangleRec(Image *dst, Rectangle rec, Color color)
|
||||
{
|
||||
// Security check to avoid program crash
|
||||
if ((dst->data == NULL) || (dst->width == 0) || (dst->height == 0)) return;
|
||||
|
||||
Image imRec = RaylibSIMD_GenImageColor((int)rec.width, (int)rec.height, color);
|
||||
RaylibSIMD_ImageDraw(dst, imRec, (Rectangle){0.f, 0.f, RS_CAST(float)rec.width, RS_CAST(float)rec.height}, rec, WHITE);
|
||||
UnloadImage(imRec);
|
||||
}
|
||||
|
||||
void RaylibSIMD_ImageDrawRectangle(Image *dst, int posX, int posY, int width, int height, Color color)
|
||||
{
|
||||
RaylibSIMD_ImageDrawRectangleRec(dst, (Rectangle){RS_CAST(float)posX, RS_CAST(float)posY, RS_CAST(float)width, RS_CAST(float)height}, color);
|
||||
}
|
||||
|
||||
void RaylibSIMD_ImageClearBackground(Image *dst, Color color)
|
||||
{
|
||||
RaylibSIMD_ImageDrawRectangle(dst, 0, 0, dst->width, dst->height, color);
|
||||
}
|
||||
|
||||
#endif // RAYLIB_SIMD_IMPLEMENTATION
|
||||
Loading…
Reference in New Issue