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TWINE: fixed polygon clipping issue

Browse source 
https://bugs.scummvm.org/ticket/12020
This commit is contained in:
Martin Gerhardy 2021-11-29 16:24:31 +01:00
parent e446215fec
commit 724a4f24f2
1 changed files with 3 additions and 3 deletions
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6
engines/twine/renderer/renderer.cpp
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@ -417,7 +417,7 @@ bool Renderer::computePolygons(int16 polyRenderType, const Vertex *vertices, int
if (vtop > vbottom) {
return false;
}
if (vright < clip.left - 1 || vleft > clip.right + 1 || vbottom < clip.top - 1 || vtop > clip.bottom + 1) {
if (vright <= clip.left || vleft >= clip.right || vbottom <= clip.top || vtop >= clip.bottom) {
debug(10, "Clipped %i:%i:%i:%i, clip rect(%i:%i:%i:%i)", vleft, vtop, vright, vbottom, clip.left, clip.top, clip.right, clip.bottom);
return false;
}
@ -467,7 +467,7 @@ bool Renderer::computePolygons(int16 polyRenderType, const Vertex *vertices, int
float slope = (float)hsize / (float)vsize;
slope = up ? -slope : slope;
for (int16 i = 0; i < vsize + 2; i++) {
for (int16 i = 0; i <= vsize; i++) {
if (outPtr >= polyTabBegin && outPtr <= polyTabEnd) {
*outPtr = xpos;
}
@ -478,7 +478,7 @@ bool Renderer::computePolygons(int16 polyRenderType, const Vertex *vertices, int
if (polyRenderType >= POLYGONTYPE_GOURAUD) { // we must compute the color progression
int16 *outPtr2 = &_colorProgressionBuffer[polyTabIndex];
for (int16 i = 0; i < vsize + 2; i++) {
for (int16 i = 0; i <= vsize; i++) {
if (outPtr2 >= colProgressBufStart && outPtr2 <= colProgressBufEnd) {
*outPtr2 = cvalue;
}