-/* $Id: s_drawpix.c,v 1.42 2002/12/18 15:02:19 brianp Exp $ */
-
/*
* Mesa 3-D graphics library
* Version: 5.1
*
- * Copyright (C) 1999-2002 Brian Paul All Rights Reserved.
+ * Copyright (C) 1999-2003 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"),
#include "image.h"
#include "macros.h"
#include "imports.h"
-#include "mmath.h"
#include "pixel.h"
#include "s_context.h"
* GL_FALSE if image was completely clipped away (draw nothing)
*/
GLboolean
-_mesa_clip_pixelrect(const GLcontext *ctx,
+_swrast_clip_pixelrect(const GLcontext *ctx,
GLint *destX, GLint *destY,
GLsizei *width, GLsizei *height,
GLint *skipPixels, GLint *skipRows)
}
if (ctx->Depth.Test)
- _mesa_span_default_z(ctx, &span);
+ _swrast_span_default_z(ctx, &span);
if (ctx->Fog.Enabled)
- _mesa_span_default_fog(ctx, &span);
- if (ctx->Texture._EnabledUnits)
- _mesa_span_default_texcoords(ctx, &span);
+ _swrast_span_default_fog(ctx, &span);
+ if (ctx->Texture._EnabledCoordUnits)
+ _swrast_span_default_texcoords(ctx, &span);
if ((SWRAST_CONTEXT(ctx)->_RasterMask & ~CLIP_BIT) == 0
- && ctx->Texture._EnabledUnits == 0
+ && ctx->Texture._EnabledCoordUnits == 0
&& unpack->Alignment == 1
&& !unpack->SwapBytes
&& !unpack->LsbFirst) {
GLint skipPixels = unpack->SkipPixels;
GLint skipRows = unpack->SkipRows;
GLint rowLength;
- GLdepth zSpan[MAX_WIDTH]; /* only used when zooming */
GLint zoomY0 = 0;
if (unpack->RowLength > 0)
rowLength = width;
/* If we're not using pixel zoom then do all clipping calculations
- * now. Otherwise, we'll let the _mesa_write_zoomed_*_span() functions
+ * now. Otherwise, we'll let the _swrast_write_zoomed_*_span() functions
* handle the clipping.
*/
if (ctx->Pixel.ZoomX==1.0F && ctx->Pixel.ZoomY==1.0F) {
return GL_TRUE;
}
else {
- /* setup array of fragment Z value to pass to zoom function */
- GLdepth z = (GLdepth) (ctx->Current.RasterPos[2] * ctx->DepthMaxF);
- GLint i;
if (drawWidth > MAX_WIDTH)
return GL_FALSE; /* fall back to general case path */
- for (i=0; i<drawWidth; i++)
- zSpan[i] = z;
/* save Y value of first row */
zoomY0 = IROUND(ctx->Current.RasterPos[1]);
span.x = destX;
span.y = destY;
span.end = drawWidth;
- _mesa_write_zoomed_rgba_span(ctx, &span,
+ _swrast_write_zoomed_rgba_span(ctx, &span,
(CONST GLchan (*)[4]) src, zoomY0, 0);
src += rowLength * 4;
destY++;
span.x = destX;
span.y = destY;
span.end = drawWidth;
- _mesa_write_zoomed_rgb_span(ctx, &span,
+ _swrast_write_zoomed_rgb_span(ctx, &span,
(CONST GLchan (*)[3]) src, zoomY0, 0);
src += rowLength * 3;
destY++;
span.x = destX;
span.y = destY;
span.end = drawWidth;
- _mesa_write_zoomed_rgb_span(ctx, &span,
+ _swrast_write_zoomed_rgb_span(ctx, &span,
(CONST GLchan (*)[3]) span.array->rgb, zoomY0, 0);
src += rowLength;
destY++;
span.x = destX;
span.y = destY;
span.end = drawWidth;
- _mesa_write_zoomed_rgba_span(ctx, &span,
+ _swrast_write_zoomed_rgba_span(ctx, &span,
(CONST GLchan (*)[4]) span.array->rgba, zoomY0, 0);
src += rowLength*2;
destY++;
span.x = destX;
span.y = destY;
span.end = drawWidth;
- _mesa_write_zoomed_rgba_span(ctx, &span,
+ _swrast_write_zoomed_rgba_span(ctx, &span,
(CONST GLchan (*)[4]) span.array->rgba, zoomY0, 0);
src += rowLength;
destY++;
INIT_SPAN(span, GL_BITMAP, 0, 0, SPAN_INDEX);
if (ctx->Depth.Test)
- _mesa_span_default_z(ctx, &span);
+ _swrast_span_default_z(ctx, &span);
if (ctx->Fog.Enabled)
- _mesa_span_default_fog(ctx, &span);
+ _swrast_span_default_fog(ctx, &span);
/*
* General solution
*/
skipPixels = 0;
while (skipPixels < width) {
- span.x = x + (zoom ? 0 : skipPixels);
- span.y = y;
- span.end = (width - skipPixels > MAX_WIDTH)
- ? MAX_WIDTH : (width - skipPixels);
- ASSERT(span.end <= MAX_WIDTH);
+ const GLint spanX = x + (zoom ? 0 : skipPixels);
+ GLint spanY = y;
+ const GLint spanEnd = (width - skipPixels > MAX_WIDTH)
+ ? MAX_WIDTH : (width - skipPixels);
+ ASSERT(spanEnd <= MAX_WIDTH);
for (row = 0; row < height; row++, span.y++) {
const GLvoid *source = _mesa_image_address(&ctx->Unpack, pixels,
width, height,
_mesa_unpack_index_span(ctx, span.end, GL_UNSIGNED_INT,
span.array->index, type, source, &ctx->Unpack,
ctx->_ImageTransferState);
+
+ /* These may get changed during writing/clipping */
+ span.x = spanX;
+ span.y = spanY;
+ span.end = spanEnd;
+
if (zoom)
- _mesa_write_zoomed_index_span(ctx, &span, y, skipPixels);
+ _swrast_write_zoomed_index_span(ctx, &span, y, skipPixels);
else
- _mesa_write_index_span(ctx, &span);
+ _swrast_write_index_span(ctx, &span);
}
- skipPixels += span.end;
+ skipPixels += spanEnd;
}
}
/* if width > MAX_WIDTH, have to process image in chunks */
skipPixels = 0;
while (skipPixels < width) {
- GLint spanX = x;
+ const GLint spanX = x;
GLint spanY = y;
- GLint spanWidth = (width - skipPixels > MAX_WIDTH)
- ? MAX_WIDTH : (width - skipPixels);
+ const GLint spanWidth = (width - skipPixels > MAX_WIDTH)
+ ? MAX_WIDTH : (width - skipPixels);
for (row = 0; row < height; row++, spanY++) {
GLstencil values[MAX_WIDTH];
}
if (zoom) {
- _mesa_write_zoomed_stencil_span(ctx, (GLuint) spanWidth,
+ _swrast_write_zoomed_stencil_span(ctx, (GLuint) spanWidth,
spanX, spanY, values, desty, 0);
}
else {
- _mesa_write_stencil_span(ctx, (GLuint) spanWidth,
+ _swrast_write_stencil_span(ctx, (GLuint) spanWidth,
spanX, spanY, values);
}
}
GLenum type, const GLvoid *pixels )
{
const GLboolean bias_or_scale = ctx->Pixel.DepthBias!=0.0 || ctx->Pixel.DepthScale!=1.0;
- const GLboolean zoom = ctx->Pixel.ZoomX!=1.0 || ctx->Pixel.ZoomY!=1.0;
+ const GLboolean zoom = ctx->Pixel.ZoomX != 1.0 || ctx->Pixel.ZoomY != 1.0;
const GLint desty = y;
struct sw_span span;
return;
}
- _mesa_span_default_color(ctx, &span);
+ _swrast_span_default_color(ctx, &span);
if (ctx->Fog.Enabled)
- _mesa_span_default_fog(ctx, &span);
- if (ctx->Texture._EnabledUnits)
- _mesa_span_default_texcoords(ctx, &span);
+ _swrast_span_default_fog(ctx, &span);
+ if (ctx->Texture._EnabledCoordUnits)
+ _swrast_span_default_texcoords(ctx, &span);
if (type == GL_UNSIGNED_SHORT && ctx->Visual.depthBits == 16
&& !bias_or_scale && !zoom && ctx->Visual.rgbMode
GLint i;
for (i = 0; i < width; i++)
span.array->z[i] = zptr[i];
- _mesa_write_rgba_span(ctx, &span);
+ _swrast_write_rgba_span(ctx, &span);
}
}
else if (type == GL_UNSIGNED_INT && ctx->Visual.depthBits == 32
_mesa_image_address(&ctx->Unpack, pixels, width, height,
GL_DEPTH_COMPONENT, type, 0, row, 0);
MEMCPY(span.array->z, zptr, width * sizeof(GLdepth));
- _mesa_write_rgba_span(ctx, &span);
+ _swrast_write_rgba_span(ctx, &span);
}
}
else {
/* in case width > MAX_WIDTH do the copy in chunks */
while (skipPixels < width) {
- span.x = x + (zoom ? 0 : skipPixels);
- span.y = y;
- span.end = (width - skipPixels > MAX_WIDTH)
- ? MAX_WIDTH : (width - skipPixels);
+ const GLint spanX = x + (zoom ? 0 : skipPixels);
+ GLint spanY = y;
+ const GLint spanEnd = (width - skipPixels > MAX_WIDTH)
+ ? MAX_WIDTH : (width - skipPixels);
ASSERT(span.end <= MAX_WIDTH);
- for (row = 0; row < height; row++, span.y++) {
+ for (row = 0; row < height; row++, spanY++) {
GLfloat floatSpan[MAX_WIDTH];
const GLvoid *src = _mesa_image_address(&ctx->Unpack,
pixels, width, height,
GL_DEPTH_COMPONENT, type,
0, row, skipPixels);
+
+ /* Set these for each row since the _swrast_write_* function may
+ * change them while clipping.
+ */
+ span.x = spanX;
+ span.y = spanY;
+ span.end = spanEnd;
+
_mesa_unpack_depth_span(ctx, span.end, floatSpan, type,
src, &ctx->Unpack);
/* clamp depth values to [0,1] and convert from floats to ints */
{
const GLfloat zs = ctx->DepthMaxF;
- GLint i;
+ GLuint i;
for (i = 0; i < span.end; i++) {
span.array->z[i] = (GLdepth) (floatSpan[i] * zs + 0.5F);
}
}
- if (ctx->Visual.rgbMode) {
- if (zoom) {
- _mesa_write_zoomed_rgba_span(ctx, &span,
- (const GLchan (*)[4]) span.array->rgba,
- desty, skipPixels);
- }
- else
- _mesa_write_rgba_span(ctx, &span);
+ if (zoom) {
+ _swrast_write_zoomed_depth_span(ctx, &span, desty, skipPixels);
+ }
+ else if (ctx->Visual.rgbMode) {
+ _swrast_write_rgba_span(ctx, &span);
}
else {
- if (zoom)
- _mesa_write_zoomed_index_span(ctx, &span, desty, 0);
- else
- _mesa_write_index_span(ctx, &span);
+ _swrast_write_index_span(ctx, &span);
}
}
- skipPixels += span.end;
+ skipPixels += spanEnd;
}
}
}
return;
if (ctx->Depth.Test)
- _mesa_span_default_z(ctx, &span);
+ _swrast_span_default_z(ctx, &span);
if (ctx->Fog.Enabled)
- _mesa_span_default_fog(ctx, &span);
- if (ctx->Texture._EnabledUnits)
- _mesa_span_default_texcoords(ctx, &span);
+ _swrast_span_default_fog(ctx, &span);
+ if (ctx->Texture._EnabledCoordUnits)
+ _swrast_span_default_texcoords(ctx, &span);
if (SWRAST_CONTEXT(ctx)->_RasterMask == 0 && !zoom && x >= 0 && y >= 0
&& x + width <= (GLint) ctx->DrawBuffer->Width
* General solution
*/
{
+ const GLuint interpMask = span.interpMask;
+ const GLuint arrayMask = span.arrayMask;
GLint row, skipPixels = 0;
/* if the span is wider than MAX_WIDTH we have to do it in chunks */
while (skipPixels < width) {
- span.x = x + (zoom ? 0 : skipPixels);
- span.y = y;
- span.end = (width - skipPixels > MAX_WIDTH)
- ? MAX_WIDTH : (width - skipPixels);
+ const GLint spanX = x + (zoom ? 0 : skipPixels);
+ GLint spanY = y;
+ const GLint spanEnd = (width - skipPixels > MAX_WIDTH)
+ ? MAX_WIDTH : (width - skipPixels);
ASSERT(span.end <= MAX_WIDTH);
- for (row = 0; row < height; row++, span.y++) {
+ for (row = 0; row < height; row++, spanY++) {
const GLvoid *source = _mesa_image_address(unpack,
pixels, width, height, format, type, 0, row, skipPixels);
+ /* Set these for each row since the _swrast_write_* function may
+ * change them while clipping.
+ */
+ span.x = spanX;
+ span.y = spanY;
+ span.end = spanEnd;
+ span.arrayMask = arrayMask;
+ span.interpMask = interpMask;
+
_mesa_unpack_chan_color_span(ctx, span.end, GL_RGBA,
(GLchan *) span.array->rgba,
format, type, source, unpack,
_swrast_pixel_texture(ctx, &span);
}
+ /* draw the span */
if (quickDraw) {
(*swrast->Driver.WriteRGBASpan)(ctx, span.end, span.x, span.y,
(CONST GLchan (*)[4]) span.array->rgba, NULL);
}
else if (zoom) {
- _mesa_write_zoomed_rgba_span(ctx, &span,
+ _swrast_write_zoomed_rgba_span(ctx, &span,
(CONST GLchan (*)[4]) span.array->rgba, desty, skipPixels);
}
else {
- _mesa_write_rgba_span(ctx, &span);
+ _swrast_write_rgba_span(ctx, &span);
}
}
- skipPixels += span.end;
+
+ skipPixels += spanEnd;
}
}
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