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Ray 2026-05-20 09:16:16 +02:00
parent 7d5b61ce01
commit 0d78f10161
1 changed files with 12 additions and 13 deletions
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25
src/external/rlsw.h vendored
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@ -5385,13 +5385,12 @@ static void SW_RASTER_TRIANGLE_SPAN(const sw_vertex_t *start, const sw_vertex_t
int xEnd = (int)end->position[0]; int xEnd = (int)end->position[0];
if (xStart == xEnd) return; if (xStart == xEnd) return;
// Intercept the span bounds to ensure we don't write before the framebuffer. // Intercept the span bounds to ensure to not write before the framebuffer
int xLoopStart = (xStart >= 0)? xStart : 0; int xLoopStart = (xStart >= 0)? xStart : 0;
int xLoopEnd = (xEnd <= RLSW.colorBuffer->width)? xEnd : RLSW.colorBuffer->width; int xLoopEnd = (xEnd <= RLSW.colorBuffer->width)? xEnd : RLSW.colorBuffer->width;
// Nothing to draw. if (xLoopStart >= xLoopEnd) return; // Nothing to draw
if (xLoopStart >= xLoopEnd) return;
// Get the current row and skip if outside the framebuffer. // Get the current row and skip if outside the framebuffer
// Maybe this check is better suited elsewhere? // Maybe this check is better suited elsewhere?
int y = (int)start->position[1]; int y = (int)start->position[1];
if (y < 0 || y >= RLSW.colorBuffer->height) return; if (y < 0 || y >= RLSW.colorBuffer->height) return;
@ -5416,12 +5415,12 @@ static void SW_RASTER_TRIANGLE_SPAN(const sw_vertex_t *start, const sw_vertex_t
#endif #endif
// Compute the subpixel distance to traverse before the first pixel // Compute the subpixel distance to traverse before the first pixel
// Also step further into them to move away from the colorbuffer edge. // Also step further into them to move away from the colorbuffer edge
float xSubstep = 1.0f - sw_fract(start->position[0]); float xSubstep = 1.0f - sw_fract(start->position[0]);
float dxStart = (float)(xLoopStart - xStart); float dxStart = (float)(xLoopStart - xStart);
float xOffset = xSubstep + dxStart; float xOffset = xSubstep + dxStart;
// Initializing the interpolation starting values. // Initializing the interpolation starting values
float w = start->position[3] + dWdx*xOffset; float w = start->position[3] + dWdx*xOffset;
float color[4] = { float color[4] = {
start->color[0] + dCdx[0]*xOffset, start->color[0] + dCdx[0]*xOffset,
@ -5747,11 +5746,11 @@ static void SW_RASTER_QUAD(const sw_vertex_t *a, const sw_vertex_t *b,
uint8_t *dPixels = RLSW.depthBuffer->pixels; uint8_t *dPixels = RLSW.depthBuffer->pixels;
#endif #endif
// Calculate the distance the in-bounds boundary is from the quad's edges, only on the left and top. // Calculate the distance the in-bounds boundary is from the quad's edges, only on the left and top
float dxMin = (float)(xLoopMin - xMin); float dxMin = (float)(xLoopMin - xMin);
float dyMin = (float)(yLoopMin - yMin); float dyMin = (float)(yLoopMin - yMin);
// Correct our start by how far we clipped outside the framebuffer. // Correct our start by how far it's clipped outside the framebuffer
cRow[0] += dCdx[0]*dxMin + dCdy[0]*dyMin; cRow[0] += dCdx[0]*dxMin + dCdy[0]*dyMin;
cRow[1] += dCdx[1]*dxMin + dCdy[1]*dyMin; cRow[1] += dCdx[1]*dxMin + dCdy[1]*dyMin;
cRow[2] += dCdx[2]*dxMin + dCdy[2]*dyMin; cRow[2] += dCdx[2]*dxMin + dCdy[2]*dyMin;
@ -5770,7 +5769,7 @@ static void SW_RASTER_QUAD(const sw_vertex_t *a, const sw_vertex_t *b,
uint8_t *cPtr = cPixels + baseOffset*SW_FRAMEBUFFER_COLOR_SIZE; uint8_t *cPtr = cPixels + baseOffset*SW_FRAMEBUFFER_COLOR_SIZE;
#ifdef SW_ENABLE_DEPTH_TEST #ifdef SW_ENABLE_DEPTH_TEST
uint8_t *dPtr = dPixels + baseOffset*SW_FRAMEBUFFER_DEPTH_SIZE; uint8_t *dPtr = dPixels + baseOffset*SW_FRAMEBUFFER_DEPTH_SIZE;
// Copy the cursors so we increment them ourselves without destroying the offset maths. // Copy the cursors without destroying the offset maths
float z = zRow; float z = zRow;
#endif #endif
#ifdef SW_ENABLE_TEXTURE #ifdef SW_ENABLE_TEXTURE
@ -5823,7 +5822,7 @@ static void SW_RASTER_QUAD(const sw_vertex_t *a, const sw_vertex_t *b,
#ifdef SW_ENABLE_DEPTH_TEST #ifdef SW_ENABLE_DEPTH_TEST
discard: discard:
#endif #endif
// We move one pixel over without touching the original "start offset" // Move one pixel over without touching the original "start offset"
color[0] += dCdx[0]; color[0] += dCdx[0];
color[1] += dCdx[1]; color[1] += dCdx[1];
color[2] += dCdx[2]; color[2] += dCdx[2];
@ -5846,9 +5845,9 @@ static void SW_RASTER_QUAD(const sw_vertex_t *a, const sw_vertex_t *b,
cPtr += SW_FRAMEBUFFER_COLOR_SIZE; cPtr += SW_FRAMEBUFFER_COLOR_SIZE;
} }
// The for loop is clamped to the right side of the screen. // The for loop is clamped to the right side of the screen
// However, these cursor start vars are still on the left. // However, these cursor start vars are still on the left
// That's fine. We just need to advance to the next row. // That's fine, advancing to the next row
cRow[0] += dCdy[0]; cRow[0] += dCdy[0];
cRow[1] += dCdy[1]; cRow[1] += dCdy[1];
cRow[2] += dCdy[2]; cRow[2] += dCdy[2];