/*
* Draw color index image.
*/
static void
draw_index_pixels( GLcontext *ctx, GLint x, GLint y,
GLsizei width, GLsizei height,
GLenum type,
const struct gl_pixelstore_attrib *unpack,
const GLvoid *pixels )
{
const GLboolean zoom = ctx->Pixel.ZoomX!=1.0 || ctx->Pixel.ZoomY!=1.0;
GLint row, skipPixels;
struct sw_span span;
INIT_SPAN(span, GL_BITMAP, 0, 0, SPAN_INDEX);
if (ctx->Depth.Test)
_swrast_span_default_z(ctx, &span);
if (ctx->Fog.Enabled)
_swrast_span_default_fog(ctx, &span);
/*
* General solution
*/
skipPixels = 0;
while (skipPixels < 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++, spanY++) {
const GLvoid *source = _mesa_image_address2d(unpack, pixels,
width, height,
GL_COLOR_INDEX, type,
row, skipPixels);
_mesa_unpack_index_span(ctx, spanEnd, GL_UNSIGNED_INT,
span.array->index, type, source, unpack,
ctx->_ImageTransferState);
/* These may get changed during writing/clipping */
span.x = spanX;
span.y = spanY;
span.end = spanEnd;
if (zoom)
_swrast_write_zoomed_index_span(ctx, &span, y, skipPixels);
else
_swrast_write_index_span(ctx, &span);
}
skipPixels += spanEnd;
}
}
/*
* Draw color index image.
*/
static void
draw_index_pixels( GLcontext *ctx, GLint x, GLint y,
GLsizei width, GLsizei height,
GLenum type,
const struct gl_pixelstore_attrib *unpack,
const GLvoid *pixels )
{
const GLint imgX = x, imgY = y;
const GLboolean zoom = ctx->Pixel.ZoomX!=1.0 || ctx->Pixel.ZoomY!=1.0;
GLint row, skipPixels;
SWspan span;
INIT_SPAN(span, GL_BITMAP);
span.arrayMask = SPAN_INDEX;
_swrast_span_default_attribs(ctx, &span);
/*
* General solution
*/
skipPixels = 0;
while (skipPixels < width) {
const GLint spanWidth = MIN2(width - skipPixels, MAX_WIDTH);
ASSERT(spanWidth <= MAX_WIDTH);
for (row = 0; row < height; row++) {
const GLvoid *source = _mesa_image_address2d(unpack, pixels,
width, height,
GL_COLOR_INDEX, type,
row, skipPixels);
_mesa_unpack_index_span(ctx, spanWidth, GL_UNSIGNED_INT,
span.array->index, type, source, unpack,
ctx->_ImageTransferState);
/* These may get changed during writing/clipping */
span.x = x + skipPixels;
span.y = y + row;
span.end = spanWidth;
if (zoom)
_swrast_write_zoomed_index_span(ctx, imgX, imgY, &span);
else
_swrast_write_index_span(ctx, &span);
}
skipPixels += spanWidth;
}
}
/*
* Draw stencil image.
*/
static void
draw_stencil_pixels( GLcontext *ctx, GLint x, GLint y,
GLsizei width, GLsizei height,
GLenum type,
const struct gl_pixelstore_attrib *unpack,
const GLvoid *pixels )
{
const GLboolean zoom = ctx->Pixel.ZoomX!=1.0 || ctx->Pixel.ZoomY!=1.0;
const GLint desty = y;
GLint row, skipPixels;
if (type != GL_BYTE &&
type != GL_UNSIGNED_BYTE &&
type != GL_SHORT &&
type != GL_UNSIGNED_SHORT &&
type != GL_INT &&
type != GL_UNSIGNED_INT &&
type != GL_FLOAT &&
type != GL_BITMAP) {
_mesa_error( ctx, GL_INVALID_ENUM, "glDrawPixels(stencil type)");
return;
}
if (ctx->Visual.stencilBits == 0) {
_mesa_error( ctx, GL_INVALID_OPERATION, "glDrawPixels(no stencil buffer)");
return;
}
/* if width > MAX_WIDTH, have to process image in chunks */
skipPixels = 0;
while (skipPixels < width) {
const GLint spanX = x;
GLint spanY = y;
const GLint spanWidth = (width - skipPixels > MAX_WIDTH)
? MAX_WIDTH : (width - skipPixels);
for (row = 0; row < height; row++, spanY++) {
GLstencil values[MAX_WIDTH];
GLenum destType = (sizeof(GLstencil) == sizeof(GLubyte))
? GL_UNSIGNED_BYTE : GL_UNSIGNED_SHORT;
const GLvoid *source = _mesa_image_address2d(unpack, pixels,
width, height,
GL_COLOR_INDEX, type,
row, skipPixels);
_mesa_unpack_index_span(ctx, spanWidth, destType, values,
type, source, unpack,
ctx->_ImageTransferState);
if (ctx->_ImageTransferState & IMAGE_SHIFT_OFFSET_BIT) {
_mesa_shift_and_offset_stencil(ctx, spanWidth, values);
}
if (ctx->Pixel.MapStencilFlag) {
_mesa_map_stencil(ctx, spanWidth, values);
}
if (zoom) {
_swrast_write_zoomed_stencil_span(ctx, (GLuint) spanWidth,
spanX, spanY, values, desty, 0);
}
else {
_swrast_write_stencil_span(ctx, (GLuint) spanWidth,
spanX, spanY, values);
}
}
skipPixels += spanWidth;
}
}
