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GBA Video: Window interpolation

This commit is contained in:
Vicki Pfau 2019-05-18 00:37:54 -07:00
parent ebb6d65945
commit 43180dca1d
2 changed files with 64 additions and 26 deletions
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2
include/mgba/internal/gba/renderers/gl.h
View File

@ -163,7 +163,7 @@ struct GBAVideoGLRenderer {
GBAMosaicControl mosaic;
struct GBAVideoGLWindowN {
struct GBAVideoWindowRegion h;
struct GBAVideoWindowRegion h[2];
struct GBAVideoWindowRegion v;
GBAWindowControl control;
} winN[2];

88
src/gba/renderers/gl.c
View File

@ -727,28 +727,28 @@ uint16_t GBAVideoGLRendererWriteVideoRegister(struct GBAVideoRenderer* renderer,
glRenderer->bldy = value;
break;
case REG_WIN0H:
glRenderer->winN[0].h.end = value;
glRenderer->winN[0].h.start = value >> 8;
if (glRenderer->winN[0].h.start > GBA_VIDEO_HORIZONTAL_PIXELS && glRenderer->winN[0].h.start > glRenderer->winN[0].h.end) {
glRenderer->winN[0].h.start = 0;
glRenderer->winN[0].h[0].end = value;
glRenderer->winN[0].h[0].start = value >> 8;
if (glRenderer->winN[0].h[0].start > GBA_VIDEO_HORIZONTAL_PIXELS && glRenderer->winN[0].h[0].start > glRenderer->winN[0].h[0].end) {
glRenderer->winN[0].h[0].start = 0;
}
if (glRenderer->winN[0].h.end > GBA_VIDEO_HORIZONTAL_PIXELS) {
glRenderer->winN[0].h.end = GBA_VIDEO_HORIZONTAL_PIXELS;
if (glRenderer->winN[0].h.start > GBA_VIDEO_HORIZONTAL_PIXELS) {
glRenderer->winN[0].h.start = GBA_VIDEO_HORIZONTAL_PIXELS;
if (glRenderer->winN[0].h[0].end > GBA_VIDEO_HORIZONTAL_PIXELS) {
glRenderer->winN[0].h[0].end = GBA_VIDEO_HORIZONTAL_PIXELS;
if (glRenderer->winN[0].h[0].start > GBA_VIDEO_HORIZONTAL_PIXELS) {
glRenderer->winN[0].h[0].start = GBA_VIDEO_HORIZONTAL_PIXELS;
}
}
break;
case REG_WIN1H:
glRenderer->winN[1].h.end = value;
glRenderer->winN[1].h.start = value >> 8;
if (glRenderer->winN[1].h.start > GBA_VIDEO_HORIZONTAL_PIXELS && glRenderer->winN[1].h.start > glRenderer->winN[1].h.end) {
glRenderer->winN[1].h.start = 0;
glRenderer->winN[1].h[0].end = value;
glRenderer->winN[1].h[0].start = value >> 8;
if (glRenderer->winN[1].h[0].start > GBA_VIDEO_HORIZONTAL_PIXELS && glRenderer->winN[1].h[0].start > glRenderer->winN[1].h[0].end) {
glRenderer->winN[1].h[0].start = 0;
}
if (glRenderer->winN[1].h.end > GBA_VIDEO_HORIZONTAL_PIXELS) {
glRenderer->winN[1].h.end = GBA_VIDEO_HORIZONTAL_PIXELS;
if (glRenderer->winN[1].h.start > GBA_VIDEO_HORIZONTAL_PIXELS) {
glRenderer->winN[1].h.start = GBA_VIDEO_HORIZONTAL_PIXELS;
if (glRenderer->winN[1].h[0].end > GBA_VIDEO_HORIZONTAL_PIXELS) {
glRenderer->winN[1].h[0].end = GBA_VIDEO_HORIZONTAL_PIXELS;
if (glRenderer->winN[1].h[0].start > GBA_VIDEO_HORIZONTAL_PIXELS) {
glRenderer->winN[1].h[0].start = GBA_VIDEO_HORIZONTAL_PIXELS;
}
}
break;
@ -820,6 +820,9 @@ void GBAVideoGLRendererDrawScanline(struct GBAVideoRenderer* renderer, int y) {
glRenderer->vramDirty = 0;
if (y == 0) {
memcpy(&glRenderer->winN[0].h[1], &glRenderer->winN[0].h[0], sizeof(struct GBAVideoWindowRegion));
memcpy(&glRenderer->winN[1].h[1], &glRenderer->winN[1].h[0], sizeof(struct GBAVideoWindowRegion));
glDisable(GL_SCISSOR_TEST);
glClearColor(0, 0, 0, 0);
glBindFramebuffer(GL_FRAMEBUFFER, glRenderer->fbo[GBA_GL_FBO_OBJ]);
@ -916,6 +919,8 @@ void GBAVideoGLRendererDrawScanline(struct GBAVideoRenderer* renderer, int y) {
glRenderer->bg[3].affine[0].sx += glRenderer->bg[3].affine[0].dmx;
glRenderer->bg[3].affine[0].sy += glRenderer->bg[3].affine[0].dmy;
}
memcpy(&glRenderer->winN[0].h[1], &glRenderer->winN[0].h[0], sizeof(struct GBAVideoWindowRegion));
memcpy(&glRenderer->winN[1].h[1], &glRenderer->winN[1].h[0], sizeof(struct GBAVideoWindowRegion));
}
void GBAVideoGLRendererFinishFrame(struct GBAVideoRenderer* renderer) {
@ -1255,30 +1260,63 @@ void GBAVideoGLRendererDrawBackgroundMode2(struct GBAVideoGLRenderer* renderer,
glDrawBuffers(1, (GLenum[]) { GL_COLOR_ATTACHMENT0 });
}
static void _clearWindow(GBAWindowControl window, int start, int end, int y, int scale, int bldy) {
static void _scissorWindow(int start, int end, int y, int lines, int scale) {
if (start > end) {
_clearWindow(window, start, GBA_VIDEO_HORIZONTAL_PIXELS, y, scale, bldy);
_clearWindow(window, 0, end, y, scale, bldy);
_scissorWindow(start, GBA_VIDEO_HORIZONTAL_PIXELS * scale, y, lines, scale);
_scissorWindow(0, end, y, lines, scale);
return;
}
glScissor(start * scale, y, (end - start) * scale, scale);
glScissor(start, y, end - start, lines);
glClear(GL_COLOR_BUFFER_BIT);
}
static void _scissorWindowN(struct GBAVideoWindowRegion* region, int y, int scale) {
int sdelta = region[0].start - region[1].start;
int edelta = region[0].end - region[1].end;
int maxDelta = 0;
if (sdelta > maxDelta) {
maxDelta = sdelta;
} else if (-sdelta > maxDelta) {
maxDelta = -sdelta;
}
if (edelta > maxDelta) {
maxDelta = edelta;
} else if (-edelta > maxDelta) {
maxDelta = -edelta;
}
if (!(sdelta | edelta) || maxDelta >= GBA_VIDEO_VERTICAL_PIXELS / 2) {
_scissorWindow(region[0].start * scale, region[0].end * scale, y, scale, scale);
} else {
int i;
for (i = 0; i < scale; ++i) {
int start = region[1].start * scale + sdelta * i;
int end = region[1].end * scale + edelta * i;
_scissorWindow(start, end, y + i, 1, scale);
}
}
}
static void _clearWindow(GBAWindowControl window, int bldy) {
window = ~window & 0xFF;
glClearColor((window & 0xF) / 32.f, (window >> 4) / 32.f, bldy / 16.f, 0);
glClear(GL_COLOR_BUFFER_BIT);
}
void GBAVideoGLRendererDrawWindow(struct GBAVideoGLRenderer* renderer, int y) {
glBindFramebuffer(GL_FRAMEBUFFER, renderer->fbo[GBA_GL_FBO_WINDOW]);
int dispcnt = ((renderer->dispcnt >> 8) & 0x1F) | 0x20;
if (!(renderer->dispcnt & 0xE000)) {
_clearWindow(dispcnt, 0, GBA_VIDEO_HORIZONTAL_PIXELS, y * renderer->scale, renderer->scale, renderer->bldy);
_clearWindow(dispcnt, renderer->bldy);
_scissorWindow(0, GBA_VIDEO_HORIZONTAL_PIXELS * renderer->scale, y * renderer->scale, renderer->scale, renderer->scale);
} else {
_clearWindow(renderer->winout & dispcnt, 0, GBA_VIDEO_HORIZONTAL_PIXELS, y * renderer->scale, renderer->scale, renderer->bldy);
_clearWindow(renderer->winout & dispcnt, renderer->bldy);
_scissorWindow(0, GBA_VIDEO_HORIZONTAL_PIXELS * renderer->scale, y * renderer->scale, renderer->scale, renderer->scale);
if (GBARegisterDISPCNTIsWin1Enable(renderer->dispcnt) && y >= renderer->winN[1].v.start && y < renderer->winN[1].v.end) {
_clearWindow(renderer->winN[1].control & dispcnt, renderer->winN[1].h.start, renderer->winN[1].h.end, y * renderer->scale, renderer->scale, renderer->bldy);
_clearWindow(renderer->winN[1].control & dispcnt, renderer->bldy);
_scissorWindowN(renderer->winN[1].h, y * renderer->scale, renderer->scale);
}
if (GBARegisterDISPCNTIsWin0Enable(renderer->dispcnt) && y >= renderer->winN[0].v.start && y < renderer->winN[0].v.end) {
_clearWindow(renderer->winN[0].control & dispcnt, renderer->winN[0].h.start, renderer->winN[0].h.end, y * renderer->scale, renderer->scale, renderer->bldy);
_clearWindow(renderer->winN[0].control & dispcnt, renderer->bldy);
_scissorWindowN(renderer->winN[0].h, y * renderer->scale, renderer->scale);
}
}
}