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GBA Video: Fix palette when being initialized mid-frame

This commit is contained in:
Vicki Pfau 2020-12-05 18:41:44 -08:00
parent 6a7e80c969
commit 5ecd28cdc6
2 changed files with 7 additions and 8 deletions
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2
include/mgba/internal/gba/renderers/gl.h
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@ -152,7 +152,7 @@ struct GBAVideoGLRenderer {
GLuint paletteTex;
uint16_t shadowPalette[GBA_VIDEO_VERTICAL_PIXELS][512];
int nextPalette;
int lastPalette;
int paletteDirtyScanlines;
bool paletteDirty;
GLuint vramTex;

13
src/gba/renderers/gl.c
View File

@ -931,7 +931,7 @@ void GBAVideoGLRendererReset(struct GBAVideoRenderer* renderer) {
glRenderer->dispcnt = 0x0080;
glRenderer->mosaic = 0;
glRenderer->nextPalette = 0;
glRenderer->lastPalette = GBA_VIDEO_VERTICAL_PIXELS - 1;
glRenderer->paletteDirtyScanlines = GBA_VIDEO_VERTICAL_PIXELS;
memset(glRenderer->shadowRegs, 0, sizeof(glRenderer->shadowRegs));
glRenderer->regsDirty = 0xFFFFFFFFFFFEULL;
@ -965,11 +965,7 @@ void GBAVideoGLRendererWritePalette(struct GBAVideoRenderer* renderer, uint32_t
int g = M_G5(value) << 1;
g |= g >> 5;
int b = M_B5(value);
if (glRenderer->nextPalette) {
glRenderer->lastPalette = glRenderer->nextPalette - 1;
} else {
glRenderer->lastPalette = GBA_VIDEO_VERTICAL_PIXELS - 1;
}
glRenderer->paletteDirtyScanlines = GBA_VIDEO_VERTICAL_PIXELS;
glRenderer->shadowPalette[glRenderer->nextPalette][address >> 1] = (r << 11) | (g << 5) | b;
}
@ -1376,7 +1372,10 @@ void GBAVideoGLRendererDrawScanline(struct GBAVideoRenderer* renderer, int y) {
}
if (glRenderer->paletteDirty) {
memcpy(glRenderer->shadowPalette[glRenderer->nextPalette], glRenderer->shadowPalette[oldPalette], sizeof(glRenderer->shadowPalette[0]));
if (glRenderer->nextPalette == glRenderer->lastPalette) {
if (glRenderer->paletteDirtyScanlines > 0) {
--glRenderer->paletteDirtyScanlines;
}
if (!glRenderer->paletteDirtyScanlines) {
glRenderer->paletteDirty = false;
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, glRenderer->paletteTex);