Major clean-up of pixel zoom code.
-/* $Id: s_alpha.c,v 1.7 2002/01/28 00:07:33 brianp Exp $ */
+/* $Id: s_alpha.c,v 1.8 2002/01/31 00:27:43 brianp Exp $ */
/*
* Mesa 3-D graphics library
#include "mmath.h"
#include "s_alpha.h"
+#include "s_context.h"
/*
* 1 = one or more pixels passed the alpha test.
*/
GLint
-_mesa_alpha_test( const GLcontext *ctx, struct sw_span *span,
- CONST GLchan rgba[][4])
+_mesa_alpha_test( const GLcontext *ctx, struct sw_span *span )
{
- GLuint i;
+ const GLchan (*rgba)[4] = (const GLchan (*)[4]) span->color.rgba;
const GLchan ref = ctx->Color.AlphaRef;
+ const GLuint n = span->end;
GLubyte *mask = span->mask;
+ GLuint i;
- ASSERT(span->arrayMask & SPAN_RGBA);
-
- /* switch cases ordered from most frequent to less frequent */
- switch (ctx->Color.AlphaFunc) {
- case GL_LESS:
- for (i=span->start; i<span->end; i++) {
- mask[i] &= (rgba[i][ACOMP] < ref);
- }
- break;
- case GL_LEQUAL:
- for (i=span->start; i<span->end; i++)
- mask[i] &= (rgba[i][ACOMP] <= ref);
- break;
- case GL_GEQUAL:
- for (i=span->start; i<span->end; i++) {
- mask[i] &= (rgba[i][ACOMP] >= ref);
- }
- break;
- case GL_GREATER:
- for (i=span->start; i<span->end; i++) {
- mask[i] &= (rgba[i][ACOMP] > ref);
- }
- break;
- case GL_NOTEQUAL:
- for (i=span->start; i<span->end; i++) {
- mask[i] &= (rgba[i][ACOMP] != ref);
- }
- break;
- case GL_EQUAL:
- for (i=span->start; i<span->end; i++) {
- mask[i] &= (rgba[i][ACOMP] == ref);
- }
- break;
- case GL_ALWAYS:
- /* do nothing */
- return 1;
- case GL_NEVER:
- /* caller should check for zero! */
- return 0;
- default:
- _mesa_problem( ctx, "Invalid alpha test in gl_alpha_test" );
- return 0;
+ if (span->arrayMask & SPAN_RGBA) {
+ /* Use the array values */
+ switch (ctx->Color.AlphaFunc) {
+ case GL_LESS:
+ for (i = 0; i < n; i++)
+ mask[i] &= (rgba[i][ACOMP] < ref);
+ break;
+ case GL_LEQUAL:
+ for (i = 0; i < n; i++)
+ mask[i] &= (rgba[i][ACOMP] <= ref);
+ break;
+ case GL_GEQUAL:
+ for (i = 0; i < n; i++)
+ mask[i] &= (rgba[i][ACOMP] >= ref);
+ break;
+ case GL_GREATER:
+ for (i = 0; i < n; i++)
+ mask[i] &= (rgba[i][ACOMP] > ref);
+ break;
+ case GL_NOTEQUAL:
+ for (i = 0; i < n; i++)
+ mask[i] &= (rgba[i][ACOMP] != ref);
+ break;
+ case GL_EQUAL:
+ for (i = 0; i < n; i++)
+ mask[i] &= (rgba[i][ACOMP] == ref);
+ break;
+ case GL_ALWAYS:
+ /* do nothing */
+ return 1;
+ case GL_NEVER:
+ /* caller should check for zero! */
+ span->writeAll = GL_FALSE;
+ return 0;
+ default:
+ _mesa_problem( ctx, "Invalid alpha test in _mesa_alpha_test" );
+ return 0;
+ }
+ }
+ else {
+ /* Use the interpolation values */
+#if CHAN_TYPE == GL_FLOAT
+ const GLfloat alphaStep = span->alphaStep;
+ GLfloat alpha = span->alpha;
+ ASSERT(span->interpMask & SPAN_RGBA);
+ switch (ctx->Color.AlphaFunc) {
+ case GL_LESS:
+ for (i = 0; i < n; i++) {
+ mask[i] &= (alpha < ref);
+ alpha += alphaStep;
+ }
+ break;
+ case GL_LEQUAL:
+ for (i = 0; i < n; i++) {
+ mask[i] &= (alpha <= ref);
+ alpha += alphaStep;
+ }
+ break;
+ case GL_GEQUAL:
+ for (i = 0; i < n; i++) {
+ mask[i] &= (alpha >= ref);
+ alpha += alphaStep;
+ }
+ break;
+ case GL_GREATER:
+ for (i = 0; i < n; i++) {
+ mask[i] &= (alpha > ref);
+ alpha += alphaStep;
+ }
+ break;
+ case GL_NOTEQUAL:
+ for (i = 0; i < n; i++) {
+ mask[i] &= (alpha != ref);
+ alpha += alphaStep;
+ }
+ break;
+ case GL_EQUAL:
+ for (i = 0; i < n; i++) {
+ mask[i] &= (alpha == ref);
+ alpha += alphaStep;
+ }
+ break;
+ case GL_ALWAYS:
+ /* do nothing */
+ return 1;
+ case GL_NEVER:
+ /* caller should check for zero! */
+ span->writeAll = GL_FALSE;
+ return 0;
+ default:
+ _mesa_problem( ctx, "Invalid alpha test in gl_alpha_test" );
+ return 0;
+ }
+#else
+ /* 8 or 16-bit channel interpolation */
+ const GLfixed alphaStep = span->alphaStep;
+ GLfixed alpha = span->alpha;
+ ASSERT(span->interpMask & SPAN_RGBA);
+ switch (ctx->Color.AlphaFunc) {
+ case GL_LESS:
+ for (i = 0; i < n; i++) {
+ mask[i] &= (FixedToChan(alpha) < ref);
+ alpha += alphaStep;
+ }
+ break;
+ case GL_LEQUAL:
+ for (i = 0; i < n; i++) {
+ mask[i] &= (FixedToChan(alpha) <= ref);
+ alpha += alphaStep;
+ }
+ break;
+ case GL_GEQUAL:
+ for (i = 0; i < n; i++) {
+ mask[i] &= (FixedToChan(alpha) >= ref);
+ alpha += alphaStep;
+ }
+ break;
+ case GL_GREATER:
+ for (i = 0; i < n; i++) {
+ mask[i] &= (FixedToChan(alpha) > ref);
+ alpha += alphaStep;
+ }
+ break;
+ case GL_NOTEQUAL:
+ for (i = 0; i < n; i++) {
+ mask[i] &= (FixedToChan(alpha) != ref);
+ alpha += alphaStep;
+ }
+ break;
+ case GL_EQUAL:
+ for (i = 0; i < n; i++) {
+ mask[i] &= (FixedToChan(alpha) == ref);
+ alpha += alphaStep;
+ }
+ break;
+ case GL_ALWAYS:
+ /* do nothing */
+ return 1;
+ case GL_NEVER:
+ /* caller should check for zero! */
+ span->writeAll = GL_FALSE;
+ return 0;
+ default:
+ _mesa_problem( ctx, "Invalid alpha test in gl_alpha_test" );
+ return 0;
+ }
+#endif /* CHAN_TYPE */
}
#if 0
/* XXXX This causes conformance failures!!!! */
while ((span->start <= span->end) &&
- (mask[span->start] == 0))
+ (mask[span->start] == 0))
span->start ++;
while ((span->end >= span->start) &&
- (mask[span->end] == 0))
+ (mask[span->end] == 0))
span->end --;
#endif
+
span->writeAll = GL_FALSE;
if (span->start >= span->end)
*/
GLint
_old_alpha_test( const GLcontext *ctx,
- GLuint n, CONST GLchan rgba[][4], GLubyte mask[] )
+ GLuint n, CONST GLchan rgba[][4], GLubyte mask[] )
{
GLuint i;
const GLchan ref = ctx->Color.AlphaRef;
-/* $Id: s_alpha.h,v 1.4 2002/01/21 18:12:34 brianp Exp $ */
+/* $Id: s_alpha.h,v 1.5 2002/01/31 00:27:43 brianp Exp $ */
/*
* Mesa 3-D graphics library
- * Version: 3.5
+ * Version: 4.1
*
- * Copyright (C) 1999-2001 Brian Paul All Rights Reserved.
+ * Copyright (C) 1999-2002 Brian Paul All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
extern GLint
_old_alpha_test( const GLcontext *ctx, GLuint n,
CONST GLchan rgba[][4], GLubyte mask[] );
+
extern GLint
-_mesa_alpha_test( const GLcontext *ctx, struct sw_span *span,
- CONST GLchan rgba[][4]);
+_mesa_alpha_test( const GLcontext *ctx, struct sw_span *span );
#endif
-/* $Id: s_copypix.c,v 1.31 2002/01/28 04:25:56 brianp Exp $ */
+/* $Id: s_copypix.c,v 1.32 2002/01/31 00:27:43 brianp Exp $ */
/*
* Mesa 3-D graphics library
(const GLchan (*)[4])span.color.rgba, NULL );
}
else if (zoom) {
- _mesa_write_zoomed_rgba_span( ctx, width, destx, dy, span.zArray,
- span.fogArray,
- (const GLchan (*)[4])span.color.rgba,
- desty);
+ span.x = destx;
+ span.y = dy;
+ span.end = width;
+ _mesa_write_zoomed_rgba_span(ctx, &span,
+ (CONST GLchan (*)[4])span.color.rgba,
+ desty);
}
else {
span.x = destx;
(const GLchan (*)[4])span.color.rgba, NULL );
}
else if (zoom) {
- _mesa_write_zoomed_rgba_span( ctx, width, destx, dy, span.zArray,
- span.fogArray,
- (const GLchan (*)[4]) span.color.rgba,
- desty);
+ span.x = destx;
+ span.y = dy;
+ span.end = width;
+ _mesa_write_zoomed_rgba_span(ctx, &span,
+ (CONST GLchan (*)[4]) span.color.rgba,
+ desty);
}
else {
span.x = destx;
_mesa_map_ci( ctx, width, span.color.index );
}
- if (zoom) {
- _mesa_write_zoomed_index_span(ctx, width, destx, dy,
- span.zArray, span.fogArray,
- span.color.index, desty );
- }
- else {
- span.x = destx;
- span.y = dy;
- span.end = width;
+ span.x = destx;
+ span.y = dy;
+ span.end = width;
+ if (zoom)
+ _mesa_write_zoomed_index_span(ctx, &span, desty);
+ else
_mesa_write_index_span(ctx, &span, GL_BITMAP);
- }
}
/* Restore pixel source to be the draw buffer (for blending, etc) */
span.zArray[i] = (GLdepth) (CLAMP(d, 0.0F, 1.0F) * ctx->DepthMax);
}
+ span.x = destx;
+ span.y = dy;
+ span.end = width;
if (ctx->Visual.rgbMode) {
- if (zoom) {
- _mesa_write_zoomed_rgba_span( ctx, width, destx, dy, span.zArray,
- span.fogArray,
+ if (zoom)
+ _mesa_write_zoomed_rgba_span( ctx, &span,
(const GLchan (*)[4])span.color.rgba,
desty );
- }
- else {
- span.x = destx;
- span.y = dy;
- span.end = width;
+ else
_mesa_write_rgba_span(ctx, &span, GL_BITMAP);
- }
}
else {
- if (zoom) {
- _mesa_write_zoomed_index_span( ctx, width, destx, dy,
- span.zArray, span.fogArray,
- span.color.index, desty );
- }
- else {
- span.x = destx;
- span.y = dy;
- span.end = width;
+ if (zoom)
+ _mesa_write_zoomed_index_span( ctx, &span, desty );
+ else
_mesa_write_index_span(ctx, &span, GL_BITMAP);
- }
}
}
-/* $Id: s_drawpix.c,v 1.27 2002/01/28 00:07:33 brianp Exp $ */
+/* $Id: s_drawpix.c,v 1.28 2002/01/31 00:27:43 brianp Exp $ */
/*
* Mesa 3-D graphics library
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
const struct gl_pixelstore_attrib *unpack = &ctx->Unpack;
- GLchan rgb[MAX_WIDTH][3];
- GLchan rgba[MAX_WIDTH][4];
+ struct sw_span span;
+
+ INIT_SPAN(span);
+ span.arrayMask |= SPAN_RGBA;
if (!ctx->Current.RasterPosValid) {
return GL_TRUE; /* no-op */
}
+ if (ctx->Depth.Test)
+ _mesa_span_default_z(ctx, &span);
+ if (ctx->Fog.Enabled)
+ _mesa_span_default_fog(ctx, &span);
+
if ((SWRAST_CONTEXT(ctx)->_RasterMask&(~(SCISSOR_BIT|WINCLIP_BIT)))==0
&& ctx->Texture._ReallyEnabled == 0
&& unpack->Alignment == 1
/* with zooming */
GLint row;
for (row=0; row<drawHeight; row++) {
- _mesa_write_zoomed_rgba_span(ctx, drawWidth, destX, destY,
- zSpan, 0, (CONST GLchan (*)[4]) src, zoomY0);
+ span.x = destX;
+ span.y = destY;
+ span.end = drawWidth;
+ _mesa_write_zoomed_rgba_span(ctx, &span,
+ (CONST GLchan (*)[4]) src, zoomY0);
src += rowLength * 4;
destY++;
}
/* with zooming */
GLint row;
for (row=0; row<drawHeight; row++) {
- _mesa_write_zoomed_rgb_span(ctx, drawWidth, destX, destY,
- zSpan, 0, (CONST GLchan (*)[3]) src, zoomY0);
+ span.x = destX;
+ span.y = destY;
+ span.end = drawWidth;
+ _mesa_write_zoomed_rgb_span(ctx, &span,
+ (CONST GLchan (*)[3]) src, zoomY0);
src += rowLength * 3;
destY++;
}
for (row=0; row<drawHeight; row++) {
GLint i;
for (i=0;i<drawWidth;i++) {
- rgb[i][0] = src[i];
- rgb[i][1] = src[i];
- rgb[i][2] = src[i];
+ span.color.rgb[i][0] = src[i];
+ span.color.rgb[i][1] = src[i];
+ span.color.rgb[i][2] = src[i];
}
(*swrast->Driver.WriteRGBSpan)(ctx, drawWidth, destX, destY,
- (CONST GLchan (*)[3]) rgb, NULL);
+ (CONST GLchan (*)[3]) span.color.rgb, NULL);
src += rowLength;
destY++;
}
for (row=0; row<drawHeight; row++) {
GLint i;
for (i=0;i<drawWidth;i++) {
- rgb[i][0] = src[i];
- rgb[i][1] = src[i];
- rgb[i][2] = src[i];
+ span.color.rgb[i][0] = src[i];
+ span.color.rgb[i][1] = src[i];
+ span.color.rgb[i][2] = src[i];
}
destY--;
(*swrast->Driver.WriteRGBSpan)(ctx, drawWidth, destX, destY,
- (CONST GLchan (*)[3]) rgb, NULL);
+ (CONST GLchan (*)[3]) span.color.rgb, NULL);
src += rowLength;
}
}
for (row=0; row<drawHeight; row++) {
GLint i;
for (i=0;i<drawWidth;i++) {
- rgb[i][0] = src[i];
- rgb[i][1] = src[i];
- rgb[i][2] = src[i];
+ span.color.rgb[i][0] = src[i];
+ span.color.rgb[i][1] = src[i];
+ span.color.rgb[i][2] = src[i];
}
- _mesa_write_zoomed_rgb_span(ctx, drawWidth, destX, destY,
- zSpan, 0, (CONST GLchan (*)[3]) rgb, zoomY0);
+ span.x = destX;
+ span.y = destY;
+ span.end = drawWidth;
+ _mesa_write_zoomed_rgb_span(ctx, &span,
+ (CONST GLchan (*)[3]) span.color.rgb, zoomY0);
src += rowLength;
destY++;
}
GLint i;
GLchan *ptr = src;
for (i=0;i<drawWidth;i++) {
- rgba[i][0] = *ptr;
- rgba[i][1] = *ptr;
- rgba[i][2] = *ptr++;
- rgba[i][3] = *ptr++;
+ span.color.rgba[i][0] = *ptr;
+ span.color.rgba[i][1] = *ptr;
+ span.color.rgba[i][2] = *ptr++;
+ span.color.rgba[i][3] = *ptr++;
}
(*swrast->Driver.WriteRGBASpan)(ctx, drawWidth, destX, destY,
- (CONST GLchan (*)[4]) rgba, NULL);
+ (CONST GLchan (*)[4]) span.color.rgba, NULL);
src += rowLength*2;
destY++;
}
GLint i;
GLchan *ptr = src;
for (i=0;i<drawWidth;i++) {
- rgba[i][0] = *ptr;
- rgba[i][1] = *ptr;
- rgba[i][2] = *ptr++;
- rgba[i][3] = *ptr++;
+ span.color.rgba[i][0] = *ptr;
+ span.color.rgba[i][1] = *ptr;
+ span.color.rgba[i][2] = *ptr++;
+ span.color.rgba[i][3] = *ptr++;
}
destY--;
(*swrast->Driver.WriteRGBASpan)(ctx, drawWidth, destX, destY,
- (CONST GLchan (*)[4]) rgba, NULL);
+ (CONST GLchan (*)[4]) span.color.rgba, NULL);
src += rowLength*2;
}
}
GLchan *ptr = src;
GLint i;
for (i=0;i<drawWidth;i++) {
- rgba[i][0] = *ptr;
- rgba[i][1] = *ptr;
- rgba[i][2] = *ptr++;
- rgba[i][3] = *ptr++;
+ span.color.rgba[i][0] = *ptr;
+ span.color.rgba[i][1] = *ptr;
+ span.color.rgba[i][2] = *ptr++;
+ span.color.rgba[i][3] = *ptr++;
}
- _mesa_write_zoomed_rgba_span(ctx, drawWidth, destX, destY,
- zSpan, 0, (CONST GLchan (*)[4]) rgba, zoomY0);
+ span.x = destX;
+ span.y = destY;
+ span.end = drawWidth;
+ _mesa_write_zoomed_rgba_span(ctx, &span,
+ (CONST GLchan (*)[4]) span.color.rgba, zoomY0);
src += rowLength*2;
destY++;
}
GLint row;
for (row=0; row<drawHeight; row++) {
ASSERT(drawWidth < MAX_WIDTH);
- _mesa_map_ci8_to_rgba(ctx, drawWidth, src, rgba);
+ _mesa_map_ci8_to_rgba(ctx, drawWidth, src, span.color.rgba);
(*swrast->Driver.WriteRGBASpan)(ctx, drawWidth, destX, destY,
- (const GLchan (*)[4]) rgba,
- NULL);
+ (const GLchan (*)[4]) span.color.rgba, NULL);
src += rowLength;
destY++;
}
GLint row;
for (row=0; row<drawHeight; row++) {
ASSERT(drawWidth < MAX_WIDTH);
- _mesa_map_ci8_to_rgba(ctx, drawWidth, src, rgba);
+ _mesa_map_ci8_to_rgba(ctx, drawWidth, src, span.color.rgba);
destY--;
(*swrast->Driver.WriteRGBASpan)(ctx, drawWidth, destX, destY,
- (CONST GLchan (*)[4]) rgba,
- NULL);
+ (CONST GLchan (*)[4]) span.color.rgba, NULL);
src += rowLength;
}
return GL_TRUE;
GLint row;
for (row=0; row<drawHeight; row++) {
ASSERT(drawWidth < MAX_WIDTH);
- _mesa_map_ci8_to_rgba(ctx, drawWidth, src, rgba);
- _mesa_write_zoomed_rgba_span(ctx, drawWidth, destX, destY,
- zSpan, 0, (CONST GLchan (*)[4]) rgba, zoomY0);
+ _mesa_map_ci8_to_rgba(ctx, drawWidth, src, span.color.rgba);
+ span.x = destX;
+ span.y = destY;
+ span.end = drawWidth;
+ _mesa_write_zoomed_rgba_span(ctx, &span,
+ (CONST GLchan (*)[4]) span.color.rgba, zoomY0);
src += rowLength;
destY++;
}
span.color.index,
type, source, &ctx->Unpack,
ctx->_ImageTransferState);
- if (zoom) {
- _mesa_write_zoomed_index_span(ctx, drawWidth, x, y,
- span.zArray, span.fogArray,
- span.color.index, desty);
- }
- else {
- span.x = x;
- span.y = y;
- span.end = drawWidth;
+ span.x = x;
+ span.y = y;
+ span.end = drawWidth;
+ if (zoom)
+ _mesa_write_zoomed_index_span(ctx, &span, desty);
+ else
_mesa_write_index_span(ctx, &span, GL_BITMAP);
- }
}
}
}
}
+ span.x = x;
+ span.y = y;
+ span.end = drawWidth;
if (ctx->Visual.rgbMode) {
- if (zoom) {
- _mesa_write_zoomed_rgba_span(ctx, width, x, y, span.zArray, 0,
- (const GLchan (*)[4]) span.color.rgba, desty);
- }
- else {
- span.x = x;
- span.y = y;
- span.end = drawWidth;
+ if (zoom)
+ _mesa_write_zoomed_rgba_span(ctx, &span,
+ (const GLchan (*)[4]) span.color.rgba, desty);
+ else
_mesa_write_rgba_span(ctx, &span, GL_BITMAP);
- }
}
else {
- if (zoom) {
- _mesa_write_zoomed_index_span(ctx, drawWidth, x, y,
- span.zArray, 0,
- span.color.index, GL_BITMAP);
- }
- else {
- span.x = x;
- span.y = y;
- span.end = drawWidth;
+ if (zoom)
+ _mesa_write_zoomed_index_span(ctx, &span, desty);
+ else
_mesa_write_index_span(ctx, &span, GL_BITMAP);
- }
}
}
}
for (row = 0; row < height; row++, y++) {
const GLvoid *source = _mesa_image_address(unpack,
pixels, width, height, format, type, 0, row, 0);
- /* printf("Unpack f=0x%x t=0x%x\n", format, type);*/
_mesa_unpack_chan_color_span(ctx, width, GL_RGBA,
(GLchan *) span.color.rgba,
format, type, source, unpack,
transferOps);
- if (0){
- int k;
- for (k = 0; k < width; k++)
- printf("%02x ", span.color.rgba[k][3]);
- printf("\n");
- }
if ((ctx->Pixel.MinMaxEnabled && ctx->MinMax.Sink) ||
(ctx->Pixel.HistogramEnabled && ctx->Histogram.Sink))
(CONST GLchan (*)[4]) span.color.rgba, NULL);
}
else if (zoom) {
- _mesa_write_zoomed_rgba_span(ctx, width, x, y, span.zArray,
- span.fogArray,
+ span.x = x;
+ span.y = y;
+ span.end = width;
+ _mesa_write_zoomed_rgba_span(ctx, &span,
(CONST GLchan (*)[4]) span.color.rgba, desty);
}
else {
-/* $Id: s_span.c,v 1.27 2002/01/28 04:25:56 brianp Exp $ */
+/* $Id: s_span.c,v 1.28 2002/01/31 00:27:43 brianp Exp $ */
/*
* Mesa 3-D graphics library
GLboolean monoColor;
ASSERT((span->interpMask & span->arrayMask) == 0);
+ ASSERT((span->interpMask | span->arrayMask) & SPAN_RGBA);
MEMSET(span->mask, 1, span->end);
span->writeAll = GL_TRUE;
stipple_polygon_span(ctx, span);
}
- /* Now we may need to interpolate the colors */
- if ((span->interpMask & SPAN_RGBA) && (span->arrayMask & SPAN_RGBA) == 0) {
- interpolate_colors(ctx, span);
- /* clear the bit - this allows the WriteMonoCISpan optimization below */
- span->interpMask &= ~SPAN_RGBA;
- }
-
/* Do the alpha test */
if (ctx->Color.AlphaEnabled) {
- if (!_mesa_alpha_test(ctx, span,
- (const GLchan (*)[4]) span->color.rgba)) {
+ if (!_mesa_alpha_test(ctx, span)) {
span->interpMask = origInterpMask;
span->arrayMask = origArrayMask;
return;
return;
}
+ /* Now we may need to interpolate the colors */
+ if ((span->interpMask & SPAN_RGBA) && (span->arrayMask & SPAN_RGBA) == 0) {
+ interpolate_colors(ctx, span);
+ /* clear the bit - this allows the WriteMonoCISpan optimization below */
+ span->interpMask &= ~SPAN_RGBA;
+ }
+
/* Fog */
/* XXX try to simplify the fog code! */
if (ctx->Fog.Enabled) {
const GLuint origArrayMask = span->arrayMask;
ASSERT((span->interpMask & span->arrayMask) == 0);
-
- /* printf("%s() interp 0x%x array 0x%x\n", __FUNCTION__, span->interpMask, span->arrayMask);*/
-
ASSERT(ctx->Texture._ReallyEnabled);
+ /*
+ printf("%s() interp 0x%x array 0x%x\n", __FUNCTION__, span->interpMask, span->arrayMask);
+ */
+
MEMSET(span->mask, 1, span->end);
span->writeAll = GL_TRUE;
_swrast_multitexture_fragments( ctx, span );
/* Do the alpha test */
- if (!_old_alpha_test(ctx, span->end,
- (CONST GLchan (*)[4]) span->color.rgba,
- span->mask)) {
+ if (!_mesa_alpha_test(ctx, span)) {
span->arrayMask = origArrayMask;
- return;
+ return;
}
}
-/* $Id: s_zoom.c,v 1.11 2002/01/28 03:42:28 brianp Exp $ */
+/* $Id: s_zoom.c,v 1.12 2002/01/31 00:27:43 brianp Exp $ */
/*
* Mesa 3-D graphics library
#include "s_zoom.h"
-#ifdef DEBUG
-
-#define SAVE_SPAN(span) struct sw_span tmp_span = (span);
-
-#define RESTORE_SPAN(span) \
-{ \
- GLint i; \
- for (i=tmp_span.start; i<tmp_span.end; i++) { \
- if (tmp_span.color.rgba[i][RCOMP] != \
- (span).color.rgba[i][RCOMP] || \
- tmp_span.color.rgba[i][GCOMP] != \
- (span).color.rgba[i][GCOMP] || \
- tmp_span.color.rgba[i][BCOMP] != \
- (span).color.rgba[i][BCOMP]) { \
- fprintf(stderr, "glZoom: Color-span changed in subfunction."); \
- } \
- if (tmp_span.zArray[i] != (span).zArray[i]) { \
- fprintf(stderr, "glZoom: Depth-span changed in subfunction."); \
- } \
- } \
- (span) = tmp_span; \
-}
-
-#else /* DEBUG not defined */
-
-#define SAVE_SPAN(span) GLint start = (span).start, end = (span).end;
-#define RESTORE_SPAN(span) (span).start = start, (span).end = end; \
- (span).writeAll = GL_TRUE;
-
-#endif /* DEBUG */
-
/*
- * Write a span of pixels to the frame buffer while applying a pixel zoom.
- * This is only used by glDrawPixels and glCopyPixels.
- * Input: n - number of pixels in input row
- * x, y - destination of the span
- * z - depth values for the span
- * red, green, blue, alpha - array of colors
- * y0 - location of first row in the image we're drawing.
+ * Helper function called from _mesa_write_zoomed_rgba/rgb/index_span().
*/
-void
-_mesa_write_zoomed_rgba_span( GLcontext *ctx,
- GLuint n, GLint x, GLint y, const GLdepth z[],
- const GLfloat *fog,
- CONST GLchan rgba[][4], GLint y0 )
+static void
+zoom_span( GLcontext *ctx, const struct sw_span *span,
+ const GLvoid *src, GLint y0, GLenum format )
{
GLint r0, r1, row;
+ GLint c0, c1, skipCol;
GLint i, j;
- const GLint maxwidth = MIN2( ctx->DrawBuffer->Width, MAX_WIDTH );
+ const GLint maxWidth = MIN2( ctx->DrawBuffer->Width, MAX_WIDTH );
+ GLchan rgbaSave[MAX_WIDTH][4];
+ GLuint indexSave[MAX_WIDTH];
struct sw_span zoomed;
+ const GLchan (*rgba)[4] = (const GLchan (*)[4]) src;
+ const GLchan (*rgb)[3] = (const GLchan (*)[3]) src;
+ const GLuint *indexes = (const GLuint *) src;
INIT_SPAN(zoomed);
- zoomed.arrayMask |= SPAN_RGBA;
-
- /* compute width of output row */
- zoomed.end = (GLint) ABSF( n * ctx->Pixel.ZoomX );
- if (zoomed.end == 0) {
+ if (format == GL_RGBA || format == GL_RGB) {
+ zoomed.z = span->z;
+ zoomed.zStep = span->z;
+ zoomed.fog = span->fog;
+ zoomed.fogStep = span->fogStep;
+ zoomed.interpMask = span->interpMask & ~SPAN_RGBA;
+ zoomed.arrayMask |= SPAN_RGBA;
+ }
+ else if (format == GL_COLOR_INDEX) {
+ zoomed.z = span->z;
+ zoomed.zStep = span->z;
+ zoomed.fog = span->fog;
+ zoomed.fogStep = span->fogStep;
+ zoomed.interpMask = span->interpMask & ~SPAN_INDEX;
+ zoomed.arrayMask |= SPAN_INDEX;
+ }
+
+ /*
+ * Compute which columns to draw: [c0, c1)
+ */
+ c0 = (GLint) span->x;
+ c1 = (GLint) (span->x + span->end * ctx->Pixel.ZoomX);
+ if (c0 == c1) {
return;
}
- /*here ok or better latter? like it was before */
- else if (zoomed.end > maxwidth) {
- zoomed.end = maxwidth;
+ else if (c1 < c0) {
+ /* swap */
+ GLint ctmp = c1;
+ c1 = c0;
+ c0 = ctmp;
}
-
- if (ctx->Pixel.ZoomX<0.0) {
- /* adjust x coordinate for left/right mirroring */
- zoomed.x = x - zoomed.end;
+ if (c0 < 0) {
+ zoomed.x = 0;
+ zoomed.start = 0;
+ zoomed.end = c1;
+ skipCol = -c0;
}
- else
- zoomed.x = x;
-
-
- /* compute which rows to draw */
- row = y-y0;
+ else {
+ zoomed.x = c0;
+ zoomed.start = 0;
+ zoomed.end = c1 - c0;
+ skipCol = 0;
+ }
+ if (zoomed.end > maxWidth)
+ zoomed.end = maxWidth;
+
+ /*
+ * Compute which rows to draw: [r0, r1)
+ */
+ row = span->y - y0;
r0 = y0 + (GLint) (row * ctx->Pixel.ZoomY);
r1 = y0 + (GLint) ((row+1) * ctx->Pixel.ZoomY);
- if (r0==r1) {
+ if (r0 == r1) {
return;
}
- else if (r1<r0) {
+ else if (r1 < r0) {
+ /* swap */
GLint rtmp = r1;
r1 = r0;
r0 = rtmp;
}
- /* return early if r0...r1 is above or below window */
- if (r0<0 && r1<0) {
- /* below window */
+ ASSERT(r0 < r1);
+ ASSERT(c0 < c1);
+
+ /*
+ * Trivial clip rejection testing.
+ */
+ if (r1 < 0) /* below window */
return;
- }
- if (r0>=ctx->DrawBuffer->Height && r1>=ctx->DrawBuffer->Height) {
- /* above window */
+ if (r0 >= ctx->DrawBuffer->Height) /* above window */
return;
- }
-
- /* check if left edge is outside window */
- if (zoomed.x < 0) {
- zoomed.start = -x;
- }
-
- /* make sure span isn't too long or short */
- /* if (m>maxwidth) {
- m = maxwidth;
- }*/
-
- if (zoomed.end <= zoomed.start) {
+ if (c1 < 0) /* left of window */
+ return;
+ if (c0 >= ctx->DrawBuffer->Width) /* right of window */
return;
- }
-
- ASSERT( zoomed.end <= MAX_WIDTH );
/* zoom the span horizontally */
- if (ctx->Pixel.ZoomX==-1.0F) {
- /* n==m */
- for (j=zoomed.start; j<zoomed.end; j++) {
- i = n - j - 1;
- COPY_CHAN4(zoomed.color.rgba[j], rgba[i]);
- zoomed.zArray[j] = z[i];
+ if (format == GL_RGBA) {
+ if (ctx->Pixel.ZoomX == -1.0F) {
+ /* common case */
+ for (j = zoomed.start; j < zoomed.end; j++) {
+ i = span->end - (j + skipCol) - 1;
+ COPY_CHAN4(zoomed.color.rgba[j], rgba[i]);
+ }
}
- if (fog && ctx->Fog.Enabled) {
- for (j=zoomed.start; j<zoomed.end; j++) {
- i = n - j - 1;
- zoomed.fogArray[j] = fog[i];
- }
+ else {
+ /* general solution */
+ const GLfloat xscale = 1.0F / ctx->Pixel.ZoomX;
+ for (j = zoomed.start; j < zoomed.end; j++) {
+ i = (GLint) ((j + skipCol) * xscale);
+ if (i < 0)
+ i = span->end + i - 1;
+ COPY_CHAN4(zoomed.color.rgba[j], rgba[i]);
+ }
}
}
- else {
- const GLfloat xscale = 1.0F / ctx->Pixel.ZoomX;
- for (j=zoomed.start; j<zoomed.end; j++) {
- i = (GLint) (j * xscale);
- if (i<0) i = n + i - 1;
- COPY_CHAN4(zoomed.color.rgba[j], rgba[i]);
- zoomed.zArray[j] = z[i];
+ else if (format == GL_RGB) {
+ if (ctx->Pixel.ZoomX == -1.0F) {
+ /* common case */
+ for (j = zoomed.start; j < zoomed.end; j++) {
+ i = span->end - (j + skipCol) - 1;
+ zoomed.color.rgba[j][0] = rgb[i][0];
+ zoomed.color.rgba[j][1] = rgb[i][1];
+ zoomed.color.rgba[j][2] = rgb[i][2];
+ zoomed.color.rgba[j][3] = CHAN_MAX;
+ }
}
- if (fog && ctx->Fog.Enabled) {
- for (j=zoomed.start; j<zoomed.end; j++) {
- i = (GLint) (j * xscale);
- if (i<0) i = n + i - 1;
- zoomed.fogArray[j] = fog[i];
- }
+ else {
+ /* general solution */
+ const GLfloat xscale = 1.0F / ctx->Pixel.ZoomX;
+ for (j = zoomed.start; j < zoomed.end; j++) {
+ i = (GLint) ((j + skipCol) * xscale);
+ if (i < 0)
+ i = span->end + i - 1;
+ zoomed.color.rgba[j][0] = rgb[i][0];
+ zoomed.color.rgba[j][1] = rgb[i][1];
+ zoomed.color.rgba[j][2] = rgb[i][2];
+ zoomed.color.rgba[j][3] = CHAN_MAX;
+ }
}
}
-
- zoomed.arrayMask |= SPAN_Z;
- if (fog)
- zoomed.arrayMask |= SPAN_FOG;
-
- /* write the span */
- for (zoomed.y = r0; zoomed.y < r1; zoomed.y++) {
- SAVE_SPAN(zoomed);
- ASSERT((zoomed.interpMask & SPAN_RGBA) == 0);
- _mesa_write_rgba_span(ctx, &zoomed, GL_BITMAP);
- RESTORE_SPAN(zoomed);
- /* problem here: "zoomed" can change inside
- "_mesa_write_rgba_span". Best solution: make copy "tmpspan"
- and give to function, but too slow */
- }
-}
-
-
-
-void
-_mesa_write_zoomed_rgb_span( GLcontext *ctx,
- GLuint n, GLint x, GLint y, const GLdepth z[],
- const GLfloat *fog,
- CONST GLchan rgb[][3], GLint y0 )
-{
- GLint m;
- GLint r0, r1, row, r;
- GLint i, j, skipcol;
- GLint maxwidth = MIN2( ctx->DrawBuffer->Width, MAX_WIDTH );
- struct sw_span zoomed;
-
- INIT_SPAN(zoomed);
- zoomed.arrayMask |= SPAN_RGBA;
-
- if (fog && ctx->Fog.Enabled)
- zoomed.arrayMask |= SPAN_FOG;
-
-
- /* compute width of output row */
- m = (GLint) ABSF( n * ctx->Pixel.ZoomX );
- if (m==0) {
- return;
- }
- if (ctx->Pixel.ZoomX<0.0) {
- /* adjust x coordinate for left/right mirroring */
- x = x - m;
- }
-
- /* compute which rows to draw */
- row = y-y0;
- r0 = y0 + (GLint) (row * ctx->Pixel.ZoomY);
- r1 = y0 + (GLint) ((row+1) * ctx->Pixel.ZoomY);
- if (r0==r1) {
- return;
- }
- else if (r1<r0) {
- GLint rtmp = r1;
- r1 = r0;
- r0 = rtmp;
- }
-
- /* return early if r0...r1 is above or below window */
- if (r0<0 && r1<0) {
- /* below window */
- return;
- }
- if (r0>=ctx->DrawBuffer->Height && r1>=ctx->DrawBuffer->Height) {
- /* above window */
- return;
- }
-
- /* check if left edge is outside window */
- skipcol = 0;
- if (x<0) {
- skipcol = -x;
- m += x;
- }
- /* make sure span isn't too long or short */
- if (m>maxwidth) {
- m = maxwidth;
- }
- else if (m<=0) {
- return;
+ else if (format == GL_COLOR_INDEX) {
+ if (ctx->Pixel.ZoomX == -1.0F) {
+ /* common case */
+ for (j = zoomed.start; j < zoomed.end; j++) {
+ i = span->end - (j + skipCol) - 1;
+ zoomed.color.index[j] = indexes[i];
+ }
+ }
+ else {
+ /* general solution */
+ const GLfloat xscale = 1.0F / ctx->Pixel.ZoomX;
+ for (j = zoomed.start; j < zoomed.end; j++) {
+ i = (GLint) ((j + skipCol) * xscale);
+ if (i < 0)
+ i = span->end + i - 1;
+ zoomed.color.index[j] = indexes[i];
+ }
+ }
}
- ASSERT( m <= MAX_WIDTH );
-
- /* zoom the span horizontally */
- if (ctx->Pixel.ZoomX==-1.0F) {
- /* n==m */
- for (j=0;j<m;j++) {
- i = n - (j+skipcol) - 1;
- zoomed.color.rgba[j][0] = rgb[i][0];
- zoomed.color.rgba[j][1] = rgb[i][1];
- zoomed.color.rgba[j][2] = rgb[i][2];
- zoomed.color.rgba[j][3] = CHAN_MAX;
- zoomed.zArray[j] = z[i];
+ /* write the span in rows [r0, r1) */
+ if (format == GL_RGBA || format == GL_RGB) {
+ /* Writing the span may modify the colors, so make a backup now if we're
+ * going to call _mesa_write_zoomed_span() more than once.
+ */
+ if (r1 - r0 > 1) {
+ MEMCPY(rgbaSave, zoomed.color.rgba, zoomed.end * 4 * sizeof(GLchan));
}
- if (zoomed.arrayMask & SPAN_FOG) {
- for (j=0;j<m;j++) {
- i = n - (j+skipcol) - 1;
- zoomed.fogArray[j] = fog[i];
- }
+ for (zoomed.y = r0; zoomed.y < r1; zoomed.y++) {
+ _mesa_write_rgba_span(ctx, &zoomed, GL_BITMAP);
+ if (r1 - r0 > 1) {
+ /* restore the colors */
+ MEMCPY(zoomed.color.rgba, rgbaSave, zoomed.end*4 * sizeof(GLchan));
+ }
}
}
- else {
- GLfloat xscale = 1.0F / ctx->Pixel.ZoomX;
- for (j=0;j<m;j++) {
- i = (GLint) ((j+skipcol) * xscale);
- if (i<0) i = n + i - 1;
- zoomed.color.rgba[j][0] = rgb[i][0];
- zoomed.color.rgba[j][1] = rgb[i][1];
- zoomed.color.rgba[j][2] = rgb[i][2];
- zoomed.color.rgba[j][3] = CHAN_MAX;
- zoomed.zArray[j] = z[i];
+ else if (format == GL_COLOR_INDEX) {
+ if (r1 - r0 > 1) {
+ MEMCPY(indexSave, zoomed.color.index, zoomed.end * sizeof(GLuint));
}
- if (zoomed.arrayMask & SPAN_FOG) {
- for (j=0;j<m;j++) {
- i = (GLint) ((j+skipcol) * xscale);
- if (i<0) i = n + i - 1;
- zoomed.fogArray[j] = fog[i];
- }
+ for (zoomed.y = r0; zoomed.y < r1; zoomed.y++) {
+ _mesa_write_index_span(ctx, &zoomed, GL_BITMAP);
+ if (r1 - r0 > 1) {
+ /* restore the colors */
+ MEMCPY(zoomed.color.index, indexSave, zoomed.end * sizeof(GLuint));
+ }
}
}
-
- /* write the span */
- for (r=r0; r<r1; r++) {
- zoomed.x = x + skipcol;
- zoomed.y = r;
- zoomed.end = m;
- ASSERT((zoomed.interpMask & SPAN_RGBA) == 0);
- _mesa_write_rgba_span( ctx, &zoomed, GL_BITMAP );
- }
}
-
-/*
- * As above, but write CI pixels.
- */
void
-_mesa_write_zoomed_index_span( GLcontext *ctx,
- GLuint n, GLint x, GLint y, const GLdepth z[],
- const GLfloat *fog,
- const GLuint indexes[], GLint y0 )
+_mesa_write_zoomed_rgba_span( GLcontext *ctx, const struct sw_span *span,
+ CONST GLchan rgba[][4], GLint y0 )
{
- GLint m;
- GLint r0, r1, row, r;
- GLint i, j, skipcol;
- GLint maxwidth = MIN2( ctx->DrawBuffer->Width, MAX_WIDTH );
- struct sw_span zoomed;
-
- INIT_SPAN(zoomed);
- zoomed.arrayMask |= SPAN_INDEX;
-
- /* compute width of output row */
- m = (GLint) ABSF( n * ctx->Pixel.ZoomX );
- if (m==0) {
- return;
- }
- if (ctx->Pixel.ZoomX<0.0) {
- /* adjust x coordinate for left/right mirroring */
- x = x - m;
- }
-
- /* compute which rows to draw */
- row = y-y0;
- r0 = y0 + (GLint) (row * ctx->Pixel.ZoomY);
- r1 = y0 + (GLint) ((row+1) * ctx->Pixel.ZoomY);
- if (r0==r1) {
- return;
- }
- else if (r1<r0) {
- GLint rtmp = r1;
- r1 = r0;
- r0 = rtmp;
- }
-
- /* return early if r0...r1 is above or below window */
- if (r0<0 && r1<0) {
- /* below window */
- return;
- }
- if (r0>=ctx->DrawBuffer->Height && r1>=ctx->DrawBuffer->Height) {
- /* above window */
- return;
- }
-
- /* check if left edge is outside window */
- skipcol = 0;
- if (x<0) {
- skipcol = -x;
- m += x;
- }
- /* make sure span isn't too long or short */
- if (m>maxwidth) {
- m = maxwidth;
- }
- else if (m<=0) {
- return;
- }
+ zoom_span(ctx, span, (const GLvoid *) rgba, y0, GL_RGBA);
+}
- ASSERT( m <= MAX_WIDTH );
- /* zoom the span horizontally */
- if (ctx->Pixel.ZoomX==-1.0F) {
- /* n==m */
- for (j=0;j<m;j++) {
- i = n - (j+skipcol) - 1;
- zoomed.color.index[j] = indexes[i];
- zoomed.zArray[j] = z[i];
- }
- if (fog && ctx->Fog.Enabled) {
- for (j=0;j<m;j++) {
- i = n - (j+skipcol) - 1;
- zoomed.fogArray[j] = fog[i];
- }
- zoomed.arrayMask |= SPAN_FOG;
- }
- }
- else {
- GLfloat xscale = 1.0F / ctx->Pixel.ZoomX;
- for (j=0;j<m;j++) {
- i = (GLint) ((j+skipcol) * xscale);
- if (i<0) i = n + i - 1;
- zoomed.color.index[j] = indexes[i];
- zoomed.zArray[j] = z[i];
- }
- if (fog && ctx->Fog.Enabled) {
- for (j=0;j<m;j++) {
- i = (GLint) ((j+skipcol) * xscale);
- if (i<0) i = n + i - 1;
- zoomed.fogArray[j] = fog[i];
- }
- zoomed.arrayMask |= SPAN_FOG;
- }
- }
+void
+_mesa_write_zoomed_rgb_span( GLcontext *ctx, const struct sw_span *span,
+ CONST GLchan rgb[][3], GLint y0 )
+{
+ zoom_span(ctx, span, (const GLvoid *) rgb, y0, GL_RGB);
+}
- zoomed.arrayMask |= SPAN_Z;
- /* write the span */
- for (r=r0; r<r1; r++) {
- SAVE_SPAN(zoomed);
- ASSERT((zoomed.interpMask & SPAN_INDEX) == 0);
- zoomed.x = x + skipcol;
- zoomed.y = r;
- zoomed.end = m;
- _mesa_write_index_span(ctx, &zoomed, GL_BITMAP);
- RESTORE_SPAN(zoomed);
- }
+void
+_mesa_write_zoomed_index_span( GLcontext *ctx, const struct sw_span *span,
+ GLint y0 )
+{
+ zoom_span(ctx, span, (const GLvoid *) span->color.index, y0, GL_COLOR_INDEX);
}
-
/*
* As above, but write stencil values.
*/
-/* $Id: s_zoom.h,v 1.6 2002/01/21 18:12:34 brianp Exp $ */
+/* $Id: s_zoom.h,v 1.7 2002/01/31 00:27:43 brianp Exp $ */
/*
* Mesa 3-D graphics library
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
-
#ifndef S_ZOOM_H
#define S_ZOOM_H
-
#include "mtypes.h"
#include "swrast.h"
extern void
-_mesa_write_zoomed_rgba_span( GLcontext *ctx,
- GLuint n, GLint x, GLint y, const GLdepth z[],
- const GLfloat *fog,
- CONST GLchan rgba[][4], GLint y0 );
-
+_mesa_write_zoomed_rgba_span( GLcontext *ctx, const struct sw_span *span,
+ CONST GLchan rgb[][4], GLint y0 );
extern void
-_mesa_write_zoomed_rgb_span( GLcontext *ctx,
- GLuint n, GLint x, GLint y, const GLdepth z[],
- const GLfloat *fog,
+_mesa_write_zoomed_rgb_span( GLcontext *ctx, const struct sw_span *span,
CONST GLchan rgb[][3], GLint y0 );
-
extern void
-_mesa_write_zoomed_index_span( GLcontext *ctx,
- GLuint n, GLint x, GLint y, const GLdepth z[],
- const GLfloat *fog,
- const GLuint indexes[], GLint y0 );
-
+_mesa_write_zoomed_index_span( GLcontext *ctx, const struct sw_span *span,
+ GLint y0 );
extern void
-_mesa_write_zoomed_stencil_span( GLcontext *ctx,
- GLuint n, GLint x, GLint y,
+_mesa_write_zoomed_stencil_span( GLcontext *ctx, GLuint n, GLint x, GLint y,
const GLstencil stencil[], GLint y0 );
-
#endif
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