-/* $Id: s_bitmap.c,v 1.11 2001/06/18 23:55:18 brianp Exp $ */
+/* $Id: s_bitmap.c,v 1.20 2002/11/25 20:26:59 brianp Exp $ */
/*
* Mesa 3-D graphics library
- * Version: 3.5
+ * Version: 5.0
*
- * 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"),
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
+/**
+ * \file swrast/s_bitmap.c
+ * \brief glBitmap rendering.
+ * \author Brian Paul
+ */
#include "glheader.h"
#include "image.h"
#include "macros.h"
+#include "mmath.h"
#include "pixel.h"
#include "s_context.h"
-#include "s_fog.h"
-#include "s_pb.h"
+#include "s_span.h"
const GLubyte *bitmap )
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
- struct pixel_buffer *PB = swrast->PB;
GLint row, col;
- GLdepth fragZ;
- GLfloat fogCoord;
+ GLuint count = 0;
+ struct sw_span span;
ASSERT(ctx->RenderMode == GL_RENDER);
ASSERT(bitmap);
if (SWRAST_CONTEXT(ctx)->NewState)
_swrast_validate_derived( ctx );
- /* Set bitmap drawing color */
+ INIT_SPAN(span, GL_BITMAP, width, 0, SPAN_XY);
+
if (ctx->Visual.rgbMode) {
- GLint r, g, b, a;
- r = (GLint) (ctx->Current.RasterColor[0] * CHAN_MAXF);
- g = (GLint) (ctx->Current.RasterColor[1] * CHAN_MAXF);
- b = (GLint) (ctx->Current.RasterColor[2] * CHAN_MAXF);
- a = (GLint) (ctx->Current.RasterColor[3] * CHAN_MAXF);
- PB_SET_COLOR( PB, r, g, b, a );
+ span.interpMask |= SPAN_RGBA;
+ span.red = FloatToFixed(ctx->Current.RasterColor[0] * CHAN_MAXF);
+ span.green = FloatToFixed(ctx->Current.RasterColor[1] * CHAN_MAXF);
+ span.blue = FloatToFixed(ctx->Current.RasterColor[2] * CHAN_MAXF);
+ span.alpha = FloatToFixed(ctx->Current.RasterColor[3] * CHAN_MAXF);
+ span.redStep = span.greenStep = span.blueStep = span.alphaStep = 0;
}
else {
- PB_SET_INDEX( PB, ctx->Current.RasterIndex );
+ span.interpMask |= SPAN_INDEX;
+ span.index = ChanToFixed(ctx->Current.RasterIndex);
+ span.indexStep = 0;
}
- fragZ = (GLdepth) ( ctx->Current.RasterPos[2] * ctx->DepthMaxF);
+ if (ctx->Depth.Test)
+ _mesa_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);
+
+ for (row = 0; row < height; row++, span.y++) {
+ const GLubyte *src = (const GLubyte *) _mesa_image_address( unpack,
+ bitmap, width, height, GL_COLOR_INDEX, GL_BITMAP, 0, row, 0 );
+
+ if (unpack->LsbFirst) {
+ /* Lsb first */
+ GLubyte mask = 1U << (unpack->SkipPixels & 0x7);
+ for (col = 0; col < width; col++) {
+ if (*src & mask) {
+ span.array->x[count] = px + col;
+ span.array->y[count] = py + row;
+ count++;
+ }
+ if (mask == 128U) {
+ src++;
+ mask = 1U;
+ }
+ else {
+ mask = mask << 1;
+ }
+ }
- if (ctx->Fog.Enabled) {
- if (ctx->Fog.FogCoordinateSource == GL_FOG_COORDINATE_EXT) {
- fogCoord = ctx->Current.FogCoord;
+ /* get ready for next row */
+ if (mask != 1)
+ src++;
}
else {
- fogCoord = _mesa_z_to_fogfactor(ctx, ctx->Current.RasterDistance);
+ /* Msb first */
+ GLubyte mask = 128U >> (unpack->SkipPixels & 0x7);
+ for (col = 0; col < width; col++) {
+ if (*src & mask) {
+ span.array->x[count] = px + col;
+ span.array->y[count] = py + row;
+ count++;
+ }
+ if (mask == 1U) {
+ src++;
+ mask = 128U;
+ }
+ else {
+ mask = mask >> 1;
+ }
+ }
+
+ /* get ready for next row */
+ if (mask != 128)
+ src++;
+ }
+
+ if (count + width >= MAX_WIDTH || row + 1 == height) {
+ /* flush the span */
+ span.end = count;
+ if (ctx->Visual.rgbMode)
+ _mesa_write_rgba_span(ctx, &span);
+ else
+ _mesa_write_index_span(ctx, &span);
+ span.end = 0;
+ count = 0;
}
}
+
+ RENDER_FINISH(swrast,ctx);
+}
+
+
+#if 0
+/*
+ * XXX this is another way to implement Bitmap. Use horizontal runs of
+ * fragments, initializing the mask array to indicate which fragmens to
+ * draw or skip.
+ */
+void
+_swrast_Bitmap( GLcontext *ctx, GLint px, GLint py,
+ GLsizei width, GLsizei height,
+ const struct gl_pixelstore_attrib *unpack,
+ const GLubyte *bitmap )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ GLint row, col;
+ struct sw_span span;
+
+ ASSERT(ctx->RenderMode == GL_RENDER);
+ ASSERT(bitmap);
+
+ RENDER_START(swrast,ctx);
+
+ if (SWRAST_CONTEXT(ctx)->NewState)
+ _swrast_validate_derived( ctx );
+
+ INIT_SPAN(span, GL_BITMAP, width, 0, SPAN_MASK);
+
+ /*span.arrayMask |= SPAN_MASK;*/ /* we'll init span.mask[] */
+ span.x = px;
+ span.y = py;
+ /*span.end = width;*/
+ if (ctx->Visual.rgbMode) {
+ span.interpMask |= SPAN_RGBA;
+ span.red = FloatToFixed(ctx->Current.RasterColor[0] * CHAN_MAXF);
+ span.green = FloatToFixed(ctx->Current.RasterColor[1] * CHAN_MAXF);
+ span.blue = FloatToFixed(ctx->Current.RasterColor[2] * CHAN_MAXF);
+ span.alpha = FloatToFixed(ctx->Current.RasterColor[3] * CHAN_MAXF);
+ span.redStep = span.greenStep = span.blueStep = span.alphaStep = 0;
+ }
else {
- fogCoord = 0.0;
+ span.interpMask |= SPAN_INDEX;
+ span.index = ChanToFixed(ctx->Current.RasterIndex);
+ span.indexStep = 0;
}
- for (row=0; row<height; row++) {
+ if (ctx->Depth.Test)
+ _mesa_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);
+
+ for (row=0; row<height; row++, span.y++) {
const GLubyte *src = (const GLubyte *) _mesa_image_address( unpack,
bitmap, width, height, GL_COLOR_INDEX, GL_BITMAP, 0, row, 0 );
/* Lsb first */
GLubyte mask = 1U << (unpack->SkipPixels & 0x7);
for (col=0; col<width; col++) {
- if (*src & mask) {
- PB_WRITE_PIXEL( PB, px+col, py+row, fragZ, fogCoord );
- }
+ span.array->mask[col] = (*src & mask) ? GL_TRUE : GL_FALSE;
if (mask == 128U) {
src++;
mask = 1U;
}
}
- PB_CHECK_FLUSH( ctx, PB );
+ if (ctx->Visual.rgbMode)
+ _mesa_write_rgba_span(ctx, &span);
+ else
+ _mesa_write_index_span(ctx, &span);
/* get ready for next row */
if (mask != 1)
/* Msb first */
GLubyte mask = 128U >> (unpack->SkipPixels & 0x7);
for (col=0; col<width; col++) {
- if (*src & mask) {
- PB_WRITE_PIXEL( PB, px+col, py+row, fragZ, fogCoord );
- }
+ span.array->mask[col] = (*src & mask) ? GL_TRUE : GL_FALSE;
if (mask == 1U) {
src++;
mask = 128U;
}
}
- PB_CHECK_FLUSH( ctx, PB );
+ if (ctx->Visual.rgbMode)
+ _mesa_write_rgba_span(ctx, &span);
+ else
+ _mesa_write_index_span(ctx, &span);
/* get ready for next row */
if (mask != 128)
}
}
- _mesa_flush_pb(ctx);
-
RENDER_FINISH(swrast,ctx);
}
+#endif
projects / mesa.git / blobdiff