review color blending system
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Bigfoot71
parent
c1621b3d6d
commit
a37a8cafd9
278
src/external/rlsw.h
vendored
278
src/external/rlsw.h
vendored
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@ -519,7 +519,6 @@ void swBindTexture(uint32_t id);
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#endif // RLSW_H
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#define RLSW_IMPL
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#ifdef RLSW_IMPL
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#include <stdlib.h>
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@ -572,6 +571,8 @@ typedef enum {
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SW_PIXELFORMAT_COMPRESSED_ASTC_8x8_RGBA // 2 bpp
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} sw_pixelformat_e;
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typedef void (*sw_factor_f)(float *factor, const float *src, const float *dst);
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typedef float sw_matrix_t[4*4];
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typedef uint16_t sw_half_t;
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@ -668,6 +669,9 @@ typedef struct {
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SWfactor srcFactor;
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SWfactor dstFactor;
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sw_factor_f srcFactorFunc;
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sw_factor_f dstFactorFunc;
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SWface cullFace; // Faces to cull
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SWerrcode errCode; // Last error code
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@ -1714,142 +1718,79 @@ static inline void sw_texture_sample(float* color, const sw_texture_t* tex, floa
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/* === Color Blending Functions === */
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static inline void sw_factor_zero(float *factor, const float *src, const float *dst)
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{
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factor[0] = factor[1] = factor[2] = factor[3] = 0.0f;
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}
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static inline void sw_factor_one(float *factor, const float *src, const float *dst)
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{
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factor[0] = factor[1] = factor[2] = factor[3] = 1.0f;
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}
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static inline void sw_factor_src_color(float *factor, const float *src, const float *dst)
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{
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factor[0] = src[0]; factor[1] = src[1]; factor[2] = src[2]; factor[3] = src[3];
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}
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static inline void sw_factor_one_minus_src_color(float *factor, const float *src, const float *dst)
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{
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factor[0] = 1.0f - src[0]; factor[1] = 1.0f - src[1];
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factor[2] = 1.0f - src[2]; factor[3] = 1.0f - src[3];
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}
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static inline void sw_factor_src_alpha(float *factor, const float *src, const float *dst)
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{
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factor[0] = factor[1] = factor[2] = factor[3] = src[3];
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}
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static inline void sw_factor_one_minus_src_alpha(float *factor, const float *src, const float *dst)
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{
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float inv_alpha = 1.0f - src[3];
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factor[0] = factor[1] = factor[2] = factor[3] = inv_alpha;
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}
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static inline void sw_factor_dst_alpha(float *factor, const float *src, const float *dst)
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{
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factor[0] = factor[1] = factor[2] = factor[3] = dst[3];
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}
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static inline void sw_factor_one_minus_dst_alpha(float *factor, const float *src, const float *dst)
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{
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float inv_alpha = 1.0f - dst[3];
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factor[0] = factor[1] = factor[2] = factor[3] = inv_alpha;
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}
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static inline void sw_factor_dst_color(float *factor, const float *src, const float *dst)
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{
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factor[0] = dst[0]; factor[1] = dst[1]; factor[2] = dst[2]; factor[3] = dst[3];
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}
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static inline void sw_factor_one_minus_dst_color(float *factor, const float *src, const float *dst)
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{
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factor[0] = 1.0f - dst[0]; factor[1] = 1.0f - dst[1];
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factor[2] = 1.0f - dst[2]; factor[3] = 1.0f - dst[3];
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}
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static inline void sw_factor_src_alpha_saturate(float *factor, const float *src, const float *dst)
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{
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factor[0] = factor[1] = factor[2] = 1.0f;
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factor[3] = (src[3] < 1.0f) ? src[3] : 1.0f;
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}
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static inline void sw_blend_colors(float dst[4], float src[4])
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{
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float src_factor[4] = { 0 };
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float dst_factor[4] = { 0 };
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float srcFactor[4], dstFactor[4];
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switch (RLSW.srcFactor) {
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case SW_ZERO:
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src_factor[0] = src_factor[1] = src_factor[2] = src_factor[3] = 0.0f;
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break;
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case SW_ONE:
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src_factor[0] = src_factor[1] = src_factor[2] = src_factor[3] = 1.0f;
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break;
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case SW_SRC_COLOR:
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src_factor[0] = src[0];
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src_factor[1] = src[1];
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src_factor[2] = src[2];
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src_factor[3] = src[3];
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break;
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case SW_ONE_MINUS_SRC_COLOR:
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src_factor[0] = 1.0f - src[0];
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src_factor[1] = 1.0f - src[1];
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src_factor[2] = 1.0f - src[2];
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src_factor[3] = 1.0f - src[3];
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break;
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case SW_SRC_ALPHA:
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src_factor[0] = src[3];
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src_factor[1] = src[3];
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src_factor[2] = src[3];
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src_factor[3] = src[3];
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break;
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case SW_ONE_MINUS_SRC_ALPHA:
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src_factor[0] = 1.0f - src[3];
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src_factor[1] = 1.0f - src[3];
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src_factor[2] = 1.0f - src[3];
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src_factor[3] = 1.0f - src[3];
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break;
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case SW_DST_ALPHA:
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src_factor[0] = dst[3];
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src_factor[1] = dst[3];
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src_factor[2] = dst[3];
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src_factor[3] = dst[3];
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break;
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case SW_ONE_MINUS_DST_ALPHA:
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src_factor[0] = 1.0f - dst[3];
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src_factor[1] = 1.0f - dst[3];
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src_factor[2] = 1.0f - dst[3];
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src_factor[3] = 1.0f - dst[3];
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break;
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case SW_DST_COLOR:
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src_factor[0] = dst[0];
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src_factor[1] = dst[1];
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src_factor[2] = dst[2];
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src_factor[3] = dst[3];
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break;
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case SW_ONE_MINUS_DST_COLOR:
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src_factor[0] = 1.0f - dst[0];
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src_factor[1] = 1.0f - dst[1];
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src_factor[2] = 1.0f - dst[2];
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src_factor[3] = 1.0f - dst[3];
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break;
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case SW_SRC_ALPHA_SATURATE:
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src_factor[0] = 1.0f;
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src_factor[1] = 1.0f;
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src_factor[2] = 1.0f;
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src_factor[3] = fminf(src[3], 1.0f);
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break;
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}
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RLSW.srcFactorFunc(srcFactor, src, dst);
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RLSW.dstFactorFunc(dstFactor, src, dst);
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switch (RLSW.dstFactor) {
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case SW_ZERO:
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dst_factor[0] = dst_factor[1] = dst_factor[2] = dst_factor[3] = 0.0f;
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break;
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case SW_ONE:
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dst_factor[0] = dst_factor[1] = dst_factor[2] = dst_factor[3] = 1.0f;
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break;
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case SW_SRC_COLOR:
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dst_factor[0] = src[0];
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dst_factor[1] = src[1];
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dst_factor[2] = src[2];
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dst_factor[3] = src[3];
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break;
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case SW_ONE_MINUS_SRC_COLOR:
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dst_factor[0] = 1.0f - src[0];
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dst_factor[1] = 1.0f - src[1];
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dst_factor[2] = 1.0f - src[2];
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dst_factor[3] = 1.0f - src[3];
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break;
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case SW_SRC_ALPHA:
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dst_factor[0] = src[3];
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dst_factor[1] = src[3];
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dst_factor[2] = src[3];
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dst_factor[3] = src[3];
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break;
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case SW_ONE_MINUS_SRC_ALPHA:
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dst_factor[0] = 1.0f - src[3];
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dst_factor[1] = 1.0f - src[3];
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dst_factor[2] = 1.0f - src[3];
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dst_factor[3] = 1.0f - src[3];
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break;
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case SW_DST_ALPHA:
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dst_factor[0] = dst[3];
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dst_factor[1] = dst[3];
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dst_factor[2] = dst[3];
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dst_factor[3] = dst[3];
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break;
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case SW_ONE_MINUS_DST_ALPHA:
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dst_factor[0] = 1.0f - dst[3];
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dst_factor[1] = 1.0f - dst[3];
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dst_factor[2] = 1.0f - dst[3];
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dst_factor[3] = 1.0f - dst[3];
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break;
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case SW_DST_COLOR:
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dst_factor[0] = dst[0];
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dst_factor[1] = dst[1];
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dst_factor[2] = dst[2];
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dst_factor[3] = dst[3];
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break;
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case SW_ONE_MINUS_DST_COLOR:
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dst_factor[0] = 1.0f - dst[0];
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dst_factor[1] = 1.0f - dst[1];
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dst_factor[2] = 1.0f - dst[2];
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dst_factor[3] = 1.0f - dst[3];
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break;
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case SW_SRC_ALPHA_SATURATE:
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// NOTE: This case is only available for the source.
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// Since the factors are validated before assignment,
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// we should never reach this point.
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break;
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dst[0] = srcFactor[0] * src[0] + dstFactor[0] * dst[0];
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dst[1] = srcFactor[1] * src[1] + dstFactor[1] * dst[1];
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dst[2] = srcFactor[2] * src[2] + dstFactor[2] * dst[2];
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dst[3] = srcFactor[3] * src[3] + dstFactor[3] * dst[3];
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}
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for (int i = 0; i < 4; ++i) {
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dst[i] = src_factor[i] * src[i] + dst_factor[i] * dst[i];
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}
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}
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/* === Projection Helper Functions === */
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static inline void sw_project_ndc_to_screen(float screen[2], const float ndc[4])
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@ -3098,6 +3039,9 @@ bool swInit(int w, int h)
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RLSW.srcFactor = SW_SRC_ALPHA;
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RLSW.dstFactor = SW_ONE_MINUS_SRC_ALPHA;
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RLSW.srcFactorFunc = sw_factor_src_alpha;
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RLSW.dstFactorFunc = sw_factor_one_minus_src_alpha;
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RLSW.polyMode = SW_FILL;
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RLSW.cullFace = SW_BACK;
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@ -3429,6 +3373,78 @@ void swBlendFunc(SWfactor sfactor, SWfactor dfactor)
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}
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RLSW.srcFactor = sfactor;
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RLSW.dstFactor = dfactor;
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switch (sfactor) {
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case SW_ZERO:
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RLSW.srcFactorFunc = sw_factor_zero;
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break;
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case SW_ONE:
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RLSW.srcFactorFunc = sw_factor_one;
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break;
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case SW_SRC_COLOR:
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RLSW.srcFactorFunc = sw_factor_src_color;
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break;
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case SW_ONE_MINUS_SRC_COLOR:
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RLSW.srcFactorFunc = sw_factor_one_minus_src_color;
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break;
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case SW_SRC_ALPHA:
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RLSW.srcFactorFunc = sw_factor_src_alpha;
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break;
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case SW_ONE_MINUS_SRC_ALPHA:
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RLSW.srcFactorFunc = sw_factor_one_minus_src_alpha;
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break;
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case SW_DST_ALPHA:
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RLSW.srcFactorFunc = sw_factor_dst_alpha;
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break;
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case SW_ONE_MINUS_DST_ALPHA:
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RLSW.srcFactorFunc = sw_factor_one_minus_dst_alpha;
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break;
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case SW_DST_COLOR:
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RLSW.srcFactorFunc = sw_factor_dst_color;
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break;
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case SW_ONE_MINUS_DST_COLOR:
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RLSW.srcFactorFunc = sw_factor_one_minus_dst_color;
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break;
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case SW_SRC_ALPHA_SATURATE:
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RLSW.srcFactorFunc = sw_factor_src_alpha_saturate;
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break;
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}
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switch (dfactor) {
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case SW_ZERO:
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RLSW.srcFactorFunc = sw_factor_zero;
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break;
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case SW_ONE:
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RLSW.srcFactorFunc = sw_factor_one;
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break;
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case SW_SRC_COLOR:
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RLSW.srcFactorFunc = sw_factor_src_color;
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break;
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case SW_ONE_MINUS_SRC_COLOR:
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RLSW.srcFactorFunc = sw_factor_one_minus_src_color;
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break;
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case SW_SRC_ALPHA:
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RLSW.srcFactorFunc = sw_factor_src_alpha;
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break;
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case SW_ONE_MINUS_SRC_ALPHA:
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RLSW.srcFactorFunc = sw_factor_one_minus_src_alpha;
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break;
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case SW_DST_ALPHA:
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RLSW.srcFactorFunc = sw_factor_dst_alpha;
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break;
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case SW_ONE_MINUS_DST_ALPHA:
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RLSW.srcFactorFunc = sw_factor_one_minus_dst_alpha;
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break;
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case SW_DST_COLOR:
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RLSW.srcFactorFunc = sw_factor_dst_color;
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break;
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case SW_ONE_MINUS_DST_COLOR:
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RLSW.srcFactorFunc = sw_factor_one_minus_dst_color;
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break;
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case SW_SRC_ALPHA_SATURATE:
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// NOTE: Should never be reached
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break;
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}
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}
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void swPolygonMode(SWpoly mode)
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