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added comments for modified code

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This commit is contained in:
ekeeke31 2008-10-27 14:08:43 +00:00
parent fad26aecb7
commit 6935483ae4
1 changed files with 55 additions and 52 deletions
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39
source/ngc/gcvideo.c
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@ -411,10 +411,10 @@ UpdateScaling()
{
int xscale, yscale;
/** Update scaling **/
// update scaling
if (GCSettings.render == 0) // original render mode
{
xscale = 640 / 2; /* use GX scaler instead VI (less artifacts) */
xscale = 640 / 2; // use GX scaler instead VI
yscale = 240 / 2;
}
else // unfiltered and filtered mode
@ -504,11 +504,12 @@ InitGCVideo ()
if (vmode->viTVMode == VI_TVMODE_NTSC_PROG)
progressive = true;
// configure VI
VIDEO_Configure (vmode);
// always 480 lines
screenheight = vmode->xfbHeight;
// Allocate the video buffers
xfb[0] = (u32 *) MEM_K0_TO_K1 (SYS_AllocateFramebuffer (vmode));
xfb[1] = (u32 *) MEM_K0_TO_K1 (SYS_AllocateFramebuffer (vmode));
@ -552,18 +553,19 @@ ResetVideo_Emu ()
GXRModeObj *rmode;
Mtx p;
// set VI modes
switch (vmode->viTVMode >> 2)
{
case VI_PAL: /* 576 lines (PAL 50Hz) */
case VI_PAL: /* 574 lines (PAL 50Hz) */
// set video signal mode (50Hz only)
// 50Hz only
NTSC_240p.viTVMode = VI_TVMODE_PAL_DS;
NTSC_240p.viYOrigin = (VI_MAX_HEIGHT_PAL - 480)/2;
break;
case VI_NTSC: /* 480 lines (NTSC 60hz) */
// set video signal mode (60Hz only)
// 60Hz only
PAL_240p.viTVMode = VI_TVMODE_NTSC_DS;
PAL_240p.viYOrigin = (VI_MAX_HEIGHT_NTSC - 480)/2;
NTSC_240p.viTVMode = VI_TVMODE_NTSC_DS;
@ -571,13 +573,14 @@ ResetVideo_Emu ()
default: /* 480 lines (PAL 60Hz) */
// set video signal mode (supports both 50/60Hz but we use 60hz for both PAL & NTSC settings)
// supports both 50/60Hz but better use 60hz by default
PAL_240p.viTVMode = VI_TVMODE(vmode->viTVMode >> 2, VI_NON_INTERLACE);
PAL_240p.viYOrigin = (VI_MAX_HEIGHT_NTSC - 480)/2;
NTSC_240p.viTVMode = VI_TVMODE(vmode->viTVMode >> 2, VI_NON_INTERLACE);
break;
}
// choose current VI mode
if (GCSettings.render == 0) // original render mode
{
rmode = tvmodes[GCSettings.timing];
@ -591,7 +594,7 @@ ResetVideo_Emu ()
rmode = vmode; // same mode as menu
}
// reconfigure VI
VIDEO_Configure (rmode);
VIDEO_ClearFrameBuffer (rmode, xfb[whichfb], COLOR_BLACK);
VIDEO_Flush();
@ -599,18 +602,15 @@ ResetVideo_Emu ()
if (rmode->viTVMode & VI_NON_INTERLACE) VIDEO_WaitVSync();
else while (VIDEO_GetNextField()) VIDEO_WaitVSync();
// reconfigure GX
GX_SetViewport (0, 0, rmode->fbWidth, rmode->efbHeight, 0, 1);
GX_SetDispCopyYScale ((f32) rmode->xfbHeight / (f32) rmode->efbHeight);
GX_SetScissor (0, 0, rmode->fbWidth, rmode->efbHeight);
GX_SetDispCopySrc (0, 0, rmode->fbWidth, rmode->efbHeight);
GX_SetDispCopyDst (rmode->fbWidth, rmode->xfbHeight);
GX_SetCopyFilter (rmode->aa, rmode->sample_pattern, (GCSettings.render == 1) ? GX_TRUE : GX_FALSE, rmode->vfilter); // Deflickering Filter only for filtered mode
GX_SetCopyFilter (rmode->aa, rmode->sample_pattern, (GCSettings.render == 1) ? GX_TRUE : GX_FALSE, rmode->vfilter); // deflickering filter only for filtered mode
GX_SetFieldMode (rmode->field_rendering, ((rmode->viHeight == 2 * rmode->xfbHeight) ? GX_ENABLE : GX_DISABLE));
GX_SetPixelFmt (GX_PF_RGB8_Z24, GX_ZC_LINEAR);
guOrtho(p, rmode->efbHeight/2, -(rmode->efbHeight/2), -(rmode->fbWidth/2), rmode->fbWidth/2, 10, 1000); // matrix, t, b, l, r, n, f
GX_LoadProjectionMtx (p, GX_ORTHOGRAPHIC);
@ -620,6 +620,7 @@ ResetVideo_Emu ()
if (!(GCSettings.render&1))
GX_InitTexObjLOD(&texobj,GX_NEAR,GX_NEAR_MIP_NEAR,2.5,9.0,0.0,GX_FALSE,GX_FALSE,GX_ANISO_1); // original/unfiltered video mode: force texture filtering OFF
// set aspect ratio
UpdateScaling();
}
@ -667,8 +668,10 @@ void RenderFrame(unsigned char *XBuf)
while ((LWP_ThreadIsSuspended (vbthread) == 0) || (copynow == GX_TRUE))
usleep (50);
// swap framebuffers
whichfb ^= 1;
// zoom has changed
if(updateScaling)
{
UpdateScaling();
@ -682,10 +685,10 @@ void RenderFrame(unsigned char *XBuf)
u8 *src3 = XBuf + 512;
u8 *src4 = XBuf + 768;
/* clear texture objects in memory */
// clear texture objects
GX_InvalidateTexAll();
// Now draw the texture
// fill the texture
for (height = 0; height < 240; height += 4)
{
for (width = 0; width < 256; width += 4)
@ -720,15 +723,15 @@ void RenderFrame(unsigned char *XBuf)
src4 += 768; // line 4*(N+3)
}
/* load texture into GX */
// load texture into GX
DCFlushRange(texturemem, TEX_WIDTH * TEX_HEIGHT * 2);
GX_LoadTexObj (&texobj, GX_TEXMAP0);
/* render textured quad */
// render textured quad
draw_square(view);
GX_DrawDone();
/* EFB is ready to be copied into XFB */
// EFB is ready to be coied into XFB
VIDEO_SetNextFramebuffer(xfb[whichfb]);
VIDEO_Flush();
copynow = GX_TRUE;