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tweak framebuffer functions for better readability

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This commit is contained in:
Bigfoot71 2025-05-11 00:12:47 +02:00
parent 1ae8bb4970
commit d9c60f2d39
1 changed files with 113 additions and 61 deletions
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174
src/external/rlsw.h vendored
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@ -519,7 +519,6 @@ void swBindTexture(uint32_t id);
#endif // RLSW_H
#define RLSW_IMPL
#ifdef RLSW_IMPL
#include <stdlib.h>
@ -901,84 +900,35 @@ static inline void sw_framebuffer_inc_depth_addr(void** ptr)
*ptr = (void*)(((uint8_t*)*ptr) + SW_DEPTH_PIXEL_SIZE);
}
#if (SW_COLOR_BUFFER_BITS == 8) // RGB - 332
static inline void sw_framebuffer_read_color(float dst[4], const void* src)
{
#if (SW_COLOR_BUFFER_BITS == 8) // RGB - 332
uint8_t pixel = ((uint8_t*)src)[0];
dst[0] = ((pixel >> 5) & 0x07) * (1.0f / 7.0f);
dst[1] = ((pixel >> 2) & 0x07) * (1.0f / 7.0f);
dst[2] = (pixel & 0x03) * (1.0f / 3.0f);
dst[3] = 1.0f;
#elif (SW_COLOR_BUFFER_BITS == 16) // RGB - 565
uint16_t pixel = ((uint16_t*)src)[0];
dst[0] = ((pixel >> 11) & 0x1F) * (1.0f / 31.0f);
dst[1] = ((pixel >> 5) & 0x3F) * (1.0f / 63.0f);
dst[2] = (pixel & 0x1F) * (1.0f / 31.0f);
dst[3] = 1.0f;
#elif (SW_COLOR_BUFFER_BITS == 24) // RGB - 888
dst[0] = ((uint8_t*)src)[0] * (1.0f / 255.0f);
dst[1] = ((uint8_t*)src)[1] * (1.0f / 255.0f);
dst[2] = ((uint8_t*)src)[2] * (1.0f / 255.0f);
dst[3] = 1.0f;
#endif
}
static inline void sw_framebuffer_write_color(void* dst, float color[3])
{
#if (SW_COLOR_BUFFER_BITS == 8) // RGB - 332
uint8_t r = ((uint8_t)(color[0] * UINT8_MAX) >> 5) & 0x07;
uint8_t g = ((uint8_t)(color[1] * UINT8_MAX) >> 5) & 0x07;
uint8_t b = ((uint8_t)(color[2] * UINT8_MAX) >> 6) & 0x03;
((uint8_t*)dst)[0] = (r << 5) | (g << 2) | b;
#elif (SW_COLOR_BUFFER_BITS == 16) // RGB - 565
uint8_t r = (uint8_t)(color[0] * 31.0f + 0.5f) & 0x1F;
uint8_t g = (uint8_t)(color[1] * 63.0f + 0.5f) & 0x3F;
uint8_t b = (uint8_t)(color[2] * 31.0f + 0.5f) & 0x1F;
((uint16_t*)dst)[0] = (r << 11) | (g << 5) | b;
#elif (SW_COLOR_BUFFER_BITS == 24) // RGB - 888
((uint8_t*)dst)[0] = (uint8_t)(color[0] * UINT8_MAX);
((uint8_t*)dst)[1] = (uint8_t)(color[1] * UINT8_MAX);
((uint8_t*)dst)[2] = (uint8_t)(color[2] * UINT8_MAX);
#endif
}
static inline float sw_framebuffer_read_depth(const void* src)
{
#if (SW_DEPTH_BUFFER_BITS == 8)
return (float)((uint8_t*)src)[0] * (1.0f / UINT8_MAX);
#elif (SW_DEPTH_BUFFER_BITS == 16)
return (float)((uint16_t*)src)[0] * (1.0f / UINT16_MAX);
#elif (SW_DEPTH_BUFFER_BITS == 24)
uint32_t depth24 = (((uint8_t*)src)[0] << 16) |
(((uint8_t*)src)[1] << 8) |
((uint8_t*)src)[2];
return depth24 / (float)0xFFFFFF;
#endif
}
static inline void sw_framebuffer_write_depth(void* dst, float depth)
{
#if (SW_DEPTH_BUFFER_BITS == 8)
((uint8_t*)dst)[0] = (uint8_t)(depth * UINT8_MAX);
#elif (SW_DEPTH_BUFFER_BITS == 16)
((uint16_t*)dst)[0] = (uint16_t)(depth * UINT16_MAX);
#elif (SW_DEPTH_BUFFER_BITS == 24)
uint32_t depth24 = (uint32_t)(depth * 0xFFFFFF);
((uint8_t*)dst)[0] = (depth24 >> 16) & 0xFF;
((uint8_t*)dst)[1] = (depth24 >> 8) & 0xFF;
((uint8_t*)dst)[2] = depth24 & 0xFF;
#endif
}
static inline void sw_framebuffer_fill_color(void* ptr, int size, float color[4])
{
#if (SW_COLOR_BUFFER_BITS == 8)
uint8_t r = ((uint8_t)(color[0] * UINT8_MAX) >> 5) & 0x07;
uint8_t g = ((uint8_t)(color[1] * UINT8_MAX) >> 5) & 0x07;
uint8_t b = ((uint8_t)(color[2] * UINT8_MAX) >> 6) & 0x03;
uint8_t* p = (uint8_t*)ptr;
if (RLSW.stateFlags & SW_STATE_SCISSOR_TEST) {
for (int y = RLSW.scMin[1]; y <= RLSW.scMax[1]; y++) {
for (int x = RLSW.scMin[0]; x <= RLSW.scMax[0]; x++) {
@ -990,11 +940,37 @@ static inline void sw_framebuffer_fill_color(void* ptr, int size, float color[4]
p[i] = (r << 5) | (g << 2) | b;
}
}
#elif (SW_COLOR_BUFFER_BITS == 16)
}
#elif (SW_COLOR_BUFFER_BITS == 16) // RGB - 565
static inline void sw_framebuffer_read_color(float dst[4], const void* src)
{
uint16_t pixel = ((uint16_t*)src)[0];
dst[0] = ((pixel >> 11) & 0x1F) * (1.0f / 31.0f);
dst[1] = ((pixel >> 5) & 0x3F) * (1.0f / 63.0f);
dst[2] = (pixel & 0x1F) * (1.0f / 31.0f);
dst[3] = 1.0f;
}
static inline void sw_framebuffer_write_color(void* dst, float color[3])
{
uint8_t r = (uint8_t)(color[0] * 31.0f + 0.5f) & 0x1F;
uint8_t g = (uint8_t)(color[1] * 63.0f + 0.5f) & 0x3F;
uint8_t b = (uint8_t)(color[2] * 31.0f + 0.5f) & 0x1F;
((uint16_t*)dst)[0] = (r << 11) | (g << 5) | b;
}
static inline void sw_framebuffer_fill_color(void* ptr, int size, float color[4])
{
uint8_t r = (uint8_t)(color[0] * 31.0f + 0.5f) & 0x1F;
uint8_t g = (uint8_t)(color[1] * 63.0f + 0.5f) & 0x3F;
uint8_t b = (uint8_t)(color[2] * 31.0f + 0.5f) & 0x1F;
uint16_t* p = (uint16_t*)ptr;
if (RLSW.stateFlags & SW_STATE_SCISSOR_TEST) {
for (int y = RLSW.scMin[1]; y <= RLSW.scMax[1]; y++) {
for (int x = RLSW.scMin[0]; x <= RLSW.scMax[0]; x++) {
@ -1006,11 +982,33 @@ static inline void sw_framebuffer_fill_color(void* ptr, int size, float color[4]
p[i] = (r << 11) | (g << 5) | b;
}
}
#elif (SW_COLOR_BUFFER_BITS == 24)
}
#elif (SW_COLOR_BUFFER_BITS == 24) // RGB - 888
static inline void sw_framebuffer_read_color(float dst[4], const void* src)
{
dst[0] = ((uint8_t*)src)[0] * (1.0f / 255.0f);
dst[1] = ((uint8_t*)src)[1] * (1.0f / 255.0f);
dst[2] = ((uint8_t*)src)[2] * (1.0f / 255.0f);
dst[3] = 1.0f;
}
static inline void sw_framebuffer_write_color(void* dst, float color[3])
{
((uint8_t*)dst)[0] = (uint8_t)(color[0] * UINT8_MAX);
((uint8_t*)dst)[1] = (uint8_t)(color[1] * UINT8_MAX);
((uint8_t*)dst)[2] = (uint8_t)(color[2] * UINT8_MAX);
}
static inline void sw_framebuffer_fill_color(void* ptr, int size, float color[4])
{
uint8_t r = (uint8_t)(color[0] * 255);
uint8_t g = (uint8_t)(color[1] * 255);
uint8_t b = (uint8_t)(color[2] * 255);
uint8_t* p = (uint8_t*)ptr;
if (RLSW.stateFlags & SW_STATE_SCISSOR_TEST) {
for (int y = RLSW.scMin[1]; y <= RLSW.scMax[1]; y++) {
for (int x = RLSW.scMin[0]; x <= RLSW.scMax[0]; x++) {
@ -1027,14 +1025,27 @@ static inline void sw_framebuffer_fill_color(void* ptr, int size, float color[4]
*p++ = b;
}
}
#endif
}
#endif // SW_COLOR_BUFFER_BITS
#if (SW_DEPTH_BUFFER_BITS == 8)
static inline float sw_framebuffer_read_depth(const void* src)
{
return (float)((uint8_t*)src)[0] * (1.0f / UINT8_MAX);
}
static inline void sw_framebuffer_write_depth(void* dst, float depth)
{
((uint8_t*)dst)[0] = (uint8_t)(depth * UINT8_MAX);
}
static inline void sw_framebuffer_fill_depth(void* ptr, int size, float value)
{
#if (SW_DEPTH_BUFFER_BITS == 8)
uint8_t v = value * UINT8_MAX;
uint8_t* p = (uint8_t*)ptr;
if (RLSW.stateFlags & SW_STATE_SCISSOR_TEST) {
for (int y = RLSW.scMin[1]; y <= RLSW.scMax[1]; y++) {
for (int x = RLSW.scMin[0]; x <= RLSW.scMax[0]; x++) {
@ -1047,9 +1058,25 @@ static inline void sw_framebuffer_fill_depth(void* ptr, int size, float value)
p[i] = v;
}
}
}
#elif (SW_DEPTH_BUFFER_BITS == 16)
static inline float sw_framebuffer_read_depth(const void* src)
{
return (float)((uint16_t*)src)[0] * (1.0f / UINT16_MAX);
}
static inline void sw_framebuffer_write_depth(void* dst, float depth)
{
((uint16_t*)dst)[0] = (uint16_t)(depth * UINT16_MAX);
}
static inline void sw_framebuffer_fill_depth(void* ptr, int size, float value)
{
uint16_t v = value * UINT16_MAX;
uint16_t* p = (uint16_t*)ptr;
if (RLSW.stateFlags & SW_STATE_SCISSOR_TEST) {
for (int y = RLSW.scMin[1]; y <= RLSW.scMax[1]; y++) {
for (int x = RLSW.scMin[0]; x <= RLSW.scMax[0]; x++) {
@ -1062,9 +1089,33 @@ static inline void sw_framebuffer_fill_depth(void* ptr, int size, float value)
p[i] = v;
}
}
}
#elif (SW_DEPTH_BUFFER_BITS == 24)
static inline float sw_framebuffer_read_depth(const void* src)
{
uint32_t depth24 = (((uint8_t*)src)[0] << 16) |
(((uint8_t*)src)[1] << 8) |
((uint8_t*)src)[2];
return depth24 / (float)0xFFFFFF;
}
static inline void sw_framebuffer_write_depth(void* dst, float depth)
{
uint32_t depth24 = (uint32_t)(depth * 0xFFFFFF);
((uint8_t*)dst)[0] = (depth24 >> 16) & 0xFF;
((uint8_t*)dst)[1] = (depth24 >> 8) & 0xFF;
((uint8_t*)dst)[2] = depth24 & 0xFF;
}
static inline void sw_framebuffer_fill_depth(void* ptr, int size, float value)
{
uint32_t v = value * UINT32_MAX;
uint8_t* p = (uint8_t*)ptr;
if (RLSW.stateFlags & SW_STATE_SCISSOR_TEST) {
for (int y = RLSW.scMin[1]; y <= RLSW.scMax[1]; y++) {
for (int x = RLSW.scMin[0]; x <= RLSW.scMax[0]; x++) {
@ -1082,9 +1133,10 @@ static inline void sw_framebuffer_fill_depth(void* ptr, int size, float value)
*p++ = v & 0xFF;
}
}
#endif
}
#endif // SW_DEPTH_BUFFER_BITS
static inline void sw_framebuffer_fill(void* colorPtr, void* depthPtr, int size, float color[4], float depth_value)
{
#if (SW_COLOR_BUFFER_BITS == 8)