#include "glheader.h"
#include "bufferobj.h"
#include "image.h"
#include "macros.h"
#include "pixel.h"
#include "s_context.h"
#include "s_span.h"
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;
GLuint count = 0;
SWspan span;
ASSERT(ctx->RenderMode == GL_RENDER);
if (unpack->BufferObj->Name) {
GLubyte *buf;
if (!_mesa_validate_pbo_access(2, unpack, width, height, 1,
GL_COLOR_INDEX, GL_BITMAP,
(GLvoid *) bitmap)) {
_mesa_error(ctx, GL_INVALID_OPERATION,"glBitmap(invalid PBO access)");
return;
}
buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
GL_READ_ONLY_ARB,
unpack->BufferObj);
if (!buf) {
_mesa_error(ctx, GL_INVALID_OPERATION, "glBitmap(PBO is mapped)");
return;
}
bitmap = ADD_POINTERS(buf, bitmap);
}
RENDER_START(swrast,ctx);
if (SWRAST_CONTEXT(ctx)->NewState)
_swrast_validate_derived( ctx );
INIT_SPAN(span, GL_BITMAP, width, 0, SPAN_XY);
_swrast_span_default_color(ctx, &span);
if (ctx->Depth.Test)
_swrast_span_default_z(ctx, &span);
if (swrast->_FogEnabled)
_swrast_span_default_fog(ctx, &span);
if (ctx->Texture._EnabledCoordUnits)
_swrast_span_default_texcoords(ctx, &span);
for (row = 0; row < height; row++) {
const GLubyte *src = (const GLubyte *) _mesa_image_address2d(unpack,
bitmap, width, height, GL_COLOR_INDEX, GL_BITMAP, row, 0);
if (unpack->LsbFirst) {
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 (mask != 1)
src++;
}
else {
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;
}
}
if (mask != 128)
src++;
}
if (count + width >= MAX_WIDTH || row + 1 == height) {
span.end = count;
if (ctx->Visual.rgbMode)
_swrast_write_rgba_span(ctx, &span);
else
_swrast_write_index_span(ctx, &span);
span.end = 0;
count = 0;
}
}
RENDER_FINISH(swrast,ctx);
if (unpack->BufferObj->Name) {
ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
unpack->BufferObj);
}
}
#if 0
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;
SWspan 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.x = px;
span.y = py;
_swrast_span_default_color(ctx, &span);
if (ctx->Depth.Test)
_swrast_span_default_z(ctx, &span);
if (swrast->_FogEnabled)
_swrast_span_default_fog(ctx, &span);
if (ctx->Texture._EnabledCoordUnits)
_swrast_span_default_texcoords(ctx, &span);
for (row=0; row<height; row++, span.y++) {
const GLubyte *src = (const GLubyte *) _mesa_image_address2d(unpack,
bitmap, width, height, GL_COLOR_INDEX, GL_BITMAP, row, 0);
if (unpack->LsbFirst) {
GLubyte mask = 1U << (unpack->SkipPixels & 0x7);
for (col=0; col<width; col++) {
span.array->mask[col] = (*src & mask) ? GL_TRUE : GL_FALSE;
if (mask == 128U) {
src++;
mask = 1U;
}
else {
mask = mask << 1;
}
}
if (ctx->Visual.rgbMode)
_swrast_write_rgba_span(ctx, &span);
else
_swrast_write_index_span(ctx, &span);
if (mask != 1)
src++;
}
else {
GLubyte mask = 128U >> (unpack->SkipPixels & 0x7);
for (col=0; col<width; col++) {
span.array->mask[col] = (*src & mask) ? GL_TRUE : GL_FALSE;
if (mask == 1U) {
src++;
mask = 128U;
}
else {
mask = mask >> 1;
}
}
if (ctx->Visual.rgbMode)
_swrast_write_rgba_span(ctx, &span);
else
_swrast_write_index_span(ctx, &span);
if (mask != 128)
src++;
}
}
RENDER_FINISH(swrast,ctx);
}
#endif