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-rw-r--r--src/mesa/main/drawpix.c844
1 files changed, 8 insertions, 836 deletions
diff --git a/src/mesa/main/drawpix.c b/src/mesa/main/drawpix.c
index 3e030ede61..afdc595273 100644
--- a/src/mesa/main/drawpix.c
+++ b/src/mesa/main/drawpix.c
@@ -1,4 +1,4 @@
-/* $Id: drawpix.c,v 1.43 2000/10/30 16:32:43 brianp Exp $ */
+/* $Id: drawpix.c,v 1.44 2000/10/31 18:09:44 keithw Exp $ */
/*
* Mesa 3-D graphics library
@@ -31,819 +31,17 @@
#include "glheader.h"
#include "colormac.h"
#include "context.h"
-#include "convolve.h"
-#include "drawpix.h"
#include "feedback.h"
-#include "image.h"
#include "macros.h"
#include "mem.h"
#include "mmath.h"
-#include "pixel.h"
-#include "pixeltex.h"
-#include "span.h"
#include "state.h"
-#include "stencil.h"
-#include "texture.h"
#include "types.h"
-#include "zoom.h"
+#include "swrast/swrast.h"
#endif
-/*
- * Given the dest position, size and skipPixels and skipRows values
- * for a glDrawPixels command, perform clipping of the image bounds
- * so the result lies withing the context's buffer bounds.
- * Return: GL_TRUE if image is ready for drawing
- * GL_FALSE if image was completely clipped away (draw nothing)
- */
-GLboolean
-_mesa_clip_pixelrect(const GLcontext *ctx,
- GLint *destX, GLint *destY,
- GLsizei *width, GLsizei *height,
- GLint *skipPixels, GLint *skipRows)
-{
- const GLframebuffer *buffer = ctx->DrawBuffer;
-
- /* left clipping */
- if (*destX < buffer->Xmin) {
- *skipPixels += (buffer->Xmin - *destX);
- *width -= (buffer->Xmin - *destX);
- *destX = buffer->Xmin;
- }
- /* right clipping */
- if (*destX + *width > buffer->Xmax)
- *width -= (*destX + *width - buffer->Xmax);
-
- if (*width <= 0)
- return GL_FALSE;
-
- /* bottom clipping */
- if (*destY < buffer->Ymin) {
- *skipRows += (buffer->Ymin - *destY);
- *height -= (buffer->Ymin - *destY);
- *destY = buffer->Ymin;
- }
- /* top clipping */
- if (*destY + *height > buffer->Ymax)
- *height -= (*destY + *height - buffer->Ymax);
-
- if (*height <= 0)
- return GL_TRUE;
-
- return GL_TRUE;
-}
-
-
-
-/*
- * Try to do a fast and simple RGB(a) glDrawPixels.
- * Return: GL_TRUE if success, GL_FALSE if slow path must be used instead
- */
-static GLboolean
-fast_draw_pixels(GLcontext *ctx, GLint x, GLint y,
- GLsizei width, GLsizei height,
- GLenum format, GLenum type, const GLvoid *pixels)
-{
- const struct gl_pixelstore_attrib *unpack = &ctx->Unpack;
- GLchan rgb[MAX_WIDTH][3];
- GLchan rgba[MAX_WIDTH][4];
-
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH_WITH_RETVAL(ctx, "glDrawPixels",
- GL_FALSE);
-
-
- if (!ctx->Current.RasterPosValid) {
- return GL_TRUE; /* no-op */
- }
-
- if ((ctx->RasterMask&(~(SCISSOR_BIT|WINCLIP_BIT)))==0
- && ctx->Texture.ReallyEnabled == 0
- && unpack->Alignment == 1
- && !unpack->SwapBytes
- && !unpack->LsbFirst) {
-
- GLint destX = x;
- GLint destY = y;
- GLint drawWidth = width; /* actual width drawn */
- GLint drawHeight = height; /* actual height drawn */
- 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 = unpack->RowLength;
- else
- rowLength = width;
-
- /* If we're not using pixel zoom then do all clipping calculations
- * now. Otherwise, we'll let the gl_write_zoomed_*_span() functions
- * handle the clipping.
- */
- if (ctx->Pixel.ZoomX==1.0F && ctx->Pixel.ZoomY==1.0F) {
- /* horizontal clipping */
- if (destX < ctx->DrawBuffer->Xmin) {
- skipPixels += (ctx->DrawBuffer->Xmin - destX);
- drawWidth -= (ctx->DrawBuffer->Xmin - destX);
- destX = ctx->DrawBuffer->Xmin;
- }
- if (destX + drawWidth > ctx->DrawBuffer->Xmax)
- drawWidth -= (destX + drawWidth - ctx->DrawBuffer->Xmax);
- if (drawWidth <= 0)
- return GL_TRUE;
-
- /* vertical clipping */
- if (destY < ctx->DrawBuffer->Ymin) {
- skipRows += (ctx->DrawBuffer->Ymin - destY);
- drawHeight -= (ctx->DrawBuffer->Ymin - destY);
- destY = ctx->DrawBuffer->Ymin;
- }
- if (destY + drawHeight > ctx->DrawBuffer->Ymax)
- drawHeight -= (destY + drawHeight - ctx->DrawBuffer->Ymax);
- if (drawHeight <= 0)
- return GL_TRUE;
- }
- else if (ctx->Pixel.ZoomX==1.0F && ctx->Pixel.ZoomY==-1.0F) {
- /* upside-down image */
- /* horizontal clipping */
- if (destX < ctx->DrawBuffer->Xmin) {
- skipPixels += (ctx->DrawBuffer->Xmin - destX);
- drawWidth -= (ctx->DrawBuffer->Xmin - destX);
- destX = ctx->DrawBuffer->Xmin;
- }
- if (destX + drawWidth > ctx->DrawBuffer->Xmax)
- drawWidth -= (destX + drawWidth - ctx->DrawBuffer->Xmax);
- if (drawWidth <= 0)
- return GL_TRUE;
-
- /* vertical clipping */
- if (destY > ctx->DrawBuffer->Ymax) {
- skipRows += (destY - ctx->DrawBuffer->Ymax);
- drawHeight -= (destY - ctx->DrawBuffer->Ymax);
- destY = ctx->DrawBuffer->Ymax;
- }
- if (destY - drawHeight < ctx->DrawBuffer->Ymin)
- drawHeight -= (ctx->DrawBuffer->Ymin - (destY - drawHeight));
- if (drawHeight <= 0)
- return GL_TRUE;
- }
- else {
- /* setup array of fragment Z value to pass to zoom function */
- GLdepth z = (GLdepth) (ctx->Current.RasterPos[2] * ctx->Visual.DepthMaxF);
- GLint i;
- ASSERT(drawWidth < MAX_WIDTH);
- for (i=0; i<drawWidth; i++)
- zSpan[i] = z;
-
- /* save Y value of first row */
- zoomY0 = (GLint) (ctx->Current.RasterPos[1] + 0.5F);
- }
-
-
- /*
- * Ready to draw!
- * The window region at (destX, destY) of size (drawWidth, drawHeight)
- * will be written to.
- * We'll take pixel data from buffer pointed to by "pixels" but we'll
- * skip "skipRows" rows and skip "skipPixels" pixels/row.
- */
-
- if (format == GL_RGBA && type == CHAN_TYPE
- && ctx->ImageTransferState==0) {
- if (ctx->Visual.RGBAflag) {
- GLchan *src = (GLchan *) pixels
- + (skipRows * rowLength + skipPixels) * 4;
- if (ctx->Pixel.ZoomX==1.0F && ctx->Pixel.ZoomY==1.0F) {
- /* no zooming */
- GLint row;
- for (row=0; row<drawHeight; row++) {
- (*ctx->Driver.WriteRGBASpan)(ctx, drawWidth, destX, destY,
- (void *) src, NULL);
- src += rowLength * 4;
- destY++;
- }
- }
- else if (ctx->Pixel.ZoomX==1.0F && ctx->Pixel.ZoomY==-1.0F) {
- /* upside-down */
- GLint row;
- for (row=0; row<drawHeight; row++) {
- destY--;
- (*ctx->Driver.WriteRGBASpan)(ctx, drawWidth, destX, destY,
- (void *) src, NULL);
- src += rowLength * 4;
- }
- }
- else {
- /* with zooming */
- GLint row;
- for (row=0; row<drawHeight; row++) {
- gl_write_zoomed_rgba_span(ctx, drawWidth, destX, destY,
- zSpan, 0, (void *) src, zoomY0);
- src += rowLength * 4;
- destY++;
- }
- }
- }
- return GL_TRUE;
- }
- else if (format == GL_RGB && type == CHAN_TYPE
- && ctx->ImageTransferState == 0) {
- if (ctx->Visual.RGBAflag) {
- GLchan *src = (GLchan *) pixels
- + (skipRows * rowLength + skipPixels) * 3;
- if (ctx->Pixel.ZoomX==1.0F && ctx->Pixel.ZoomY==1.0F) {
- GLint row;
- for (row=0; row<drawHeight; row++) {
- (*ctx->Driver.WriteRGBSpan)(ctx, drawWidth, destX, destY,
- (void *) src, NULL);
- src += rowLength * 3;
- destY++;
- }
- }
- else if (ctx->Pixel.ZoomX==1.0F && ctx->Pixel.ZoomY==-1.0F) {
- /* upside-down */
- GLint row;
- for (row=0; row<drawHeight; row++) {
- destY--;
- (*ctx->Driver.WriteRGBSpan)(ctx, drawWidth, destX, destY,
- (void *) src, NULL);
- src += rowLength * 3;
- }
- }
- else {
- /* with zooming */
- GLint row;
- for (row=0; row<drawHeight; row++) {
- gl_write_zoomed_rgb_span(ctx, drawWidth, destX, destY,
- zSpan, 0, (void *) src, zoomY0);
- src += rowLength * 3;
- destY++;
- }
- }
- }
- return GL_TRUE;
- }
- else if (format == GL_LUMINANCE && type == CHAN_TYPE
- && ctx->ImageTransferState==0) {
- if (ctx->Visual.RGBAflag) {
- GLchan *src = (GLchan *) pixels
- + (skipRows * rowLength + skipPixels);
- if (ctx->Pixel.ZoomX==1.0F && ctx->Pixel.ZoomY==1.0F) {
- /* no zooming */
- GLint row;
- ASSERT(drawWidth < MAX_WIDTH);
- 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];
- }
- (*ctx->Driver.WriteRGBSpan)(ctx, drawWidth, destX, destY,
- (void *) rgb, NULL);
- src += rowLength;
- destY++;
- }
- }
- else if (ctx->Pixel.ZoomX==1.0F && ctx->Pixel.ZoomY==-1.0F) {
- /* upside-down */
- GLint row;
- ASSERT(drawWidth < MAX_WIDTH);
- 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];
- }
- destY--;
- (*ctx->Driver.WriteRGBSpan)(ctx, drawWidth, destX, destY,
- (void *) rgb, NULL);
- src += rowLength;
- }
- }
- else {
- /* with zooming */
- GLint row;
- ASSERT(drawWidth < MAX_WIDTH);
- 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];
- }
- gl_write_zoomed_rgb_span(ctx, drawWidth, destX, destY,
- zSpan, 0, (void *) rgb, zoomY0);
- src += rowLength;
- destY++;
- }
- }
- }
- return GL_TRUE;
- }
- else if (format == GL_LUMINANCE_ALPHA && type == CHAN_TYPE
- && ctx->ImageTransferState == 0) {
- if (ctx->Visual.RGBAflag) {
- GLchan *src = (GLchan *) pixels
- + (skipRows * rowLength + skipPixels)*2;
- if (ctx->Pixel.ZoomX==1.0F && ctx->Pixel.ZoomY==1.0F) {
- /* no zooming */
- GLint row;
- ASSERT(drawWidth < MAX_WIDTH);
- for (row=0; row<drawHeight; row++) {
- 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++;
- }
- (*ctx->Driver.WriteRGBASpan)(ctx, drawWidth, destX, destY,
- (void *) rgba, NULL);
- src += rowLength*2;
- destY++;
- }
- }
- else if (ctx->Pixel.ZoomX==1.0F && ctx->Pixel.ZoomY==-1.0F) {
- /* upside-down */
- GLint row;
- ASSERT(drawWidth < MAX_WIDTH);
- for (row=0; row<drawHeight; row++) {
- 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++;
- }
- destY--;
- (*ctx->Driver.WriteRGBASpan)(ctx, drawWidth, destX, destY,
- (void *) rgba, NULL);
- src += rowLength*2;
- }
- }
- else {
- /* with zooming */
- GLint row;
- ASSERT(drawWidth < MAX_WIDTH);
- for (row=0; row<drawHeight; row++) {
- 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++;
- }
- gl_write_zoomed_rgba_span(ctx, drawWidth, destX, destY,
- zSpan, 0, (void *) rgba, zoomY0);
- src += rowLength*2;
- destY++;
- }
- }
- }
- return GL_TRUE;
- }
- else if (format==GL_COLOR_INDEX && type==GL_UNSIGNED_BYTE) {
- GLubyte *src = (GLubyte *) pixels + skipRows * rowLength + skipPixels;
- if (ctx->Visual.RGBAflag) {
- /* convert CI data to RGBA */
- if (ctx->Pixel.ZoomX==1.0F && ctx->Pixel.ZoomY==1.0F) {
- /* no zooming */
- GLint row;
- for (row=0; row<drawHeight; row++) {
- ASSERT(drawWidth < MAX_WIDTH);
- _mesa_map_ci8_to_rgba(ctx, drawWidth, src, rgba);
- (*ctx->Driver.WriteRGBASpan)(ctx, drawWidth, destX, destY,
- (const GLchan (*)[4]) rgba,
- NULL);
- src += rowLength;
- destY++;
- }
- return GL_TRUE;
- }
- else if (ctx->Pixel.ZoomX==1.0F && ctx->Pixel.ZoomY==-1.0F) {
- /* upside-down */
- GLint row;
- for (row=0; row<drawHeight; row++) {
- ASSERT(drawWidth < MAX_WIDTH);
- _mesa_map_ci8_to_rgba(ctx, drawWidth, src, rgba);
- destY--;
- (*ctx->Driver.WriteRGBASpan)(ctx, drawWidth, destX, destY,
- (const GLchan (*)[4]) rgba,
- NULL);
- src += rowLength;
- }
- return GL_TRUE;
- }
- else {
- /* with zooming */
- GLint row;
- for (row=0; row<drawHeight; row++) {
- ASSERT(drawWidth < MAX_WIDTH);
- _mesa_map_ci8_to_rgba(ctx, drawWidth, src, rgba);
- gl_write_zoomed_rgba_span(ctx, drawWidth, destX, destY,
- zSpan, 0, (void *) rgba, zoomY0);
- src += rowLength;
- destY++;
- }
- return GL_TRUE;
- }
- }
- else if (ctx->ImageTransferState==0) {
- /* write CI data to CI frame buffer */
- GLint row;
- if (ctx->Pixel.ZoomX==1.0F && ctx->Pixel.ZoomY==1.0F) {
- /* no zooming */
- for (row=0; row<drawHeight; row++) {
- (*ctx->Driver.WriteCI8Span)(ctx, drawWidth, destX, destY,
- src, NULL);
- src += rowLength;
- destY++;
- }
- return GL_TRUE;
- }
- else {
- /* with zooming */
- return GL_FALSE;
- }
- }
- }
- else {
- /* can't handle this pixel format and/or data type here */
- return GL_FALSE;
- }
- }
-
- /* can't do a simple draw, have to use slow path */
- return GL_FALSE;
-}
-
-
-
-/*
- * Do glDrawPixels of index pixels.
- */
-static void
-draw_index_pixels( GLcontext *ctx, GLint x, GLint y,
- GLsizei width, GLsizei height,
- GLenum type, const GLvoid *pixels )
-{
- const GLboolean zoom = ctx->Pixel.ZoomX!=1.0 || ctx->Pixel.ZoomY!=1.0;
- const GLint desty = y;
- GLint row, drawWidth;
- GLdepth zspan[MAX_WIDTH];
-
- drawWidth = (width > MAX_WIDTH) ? MAX_WIDTH : width;
-
- /* Fragment depth values */
- if (ctx->Depth.Test || ctx->Fog.Enabled) {
- GLdepth zval = (GLdepth) (ctx->Current.RasterPos[2] * ctx->Visual.DepthMaxF);
- GLint i;
- for (i = 0; i < drawWidth; i++) {
- zspan[i] = zval;
- }
- }
-
- /*
- * General solution
- */
- for (row = 0; row < height; row++, y++) {
- GLuint indexes[MAX_WIDTH];
- const GLvoid *source = _mesa_image_address(&ctx->Unpack,
- pixels, width, height, GL_COLOR_INDEX, type, 0, row, 0);
- _mesa_unpack_index_span(ctx, drawWidth, GL_UNSIGNED_INT, indexes,
- type, source, &ctx->Unpack,
- ctx->ImageTransferState);
- if (zoom) {
- gl_write_zoomed_index_span(ctx, drawWidth, x, y, zspan, 0, indexes, desty);
- }
- else {
- gl_write_index_span(ctx, drawWidth, x, y, zspan, 0, indexes, GL_BITMAP);
- }
- }
-}
-
-
-
-/*
- * Do glDrawPixels of stencil image. The image datatype may either
- * be GLubyte or GLbitmap.
- */
-static void
-draw_stencil_pixels( GLcontext *ctx, GLint x, GLint y,
- GLsizei width, GLsizei height,
- GLenum type, const GLvoid *pixels )
-{
- const GLboolean zoom = ctx->Pixel.ZoomX!=1.0 || ctx->Pixel.ZoomY!=1.0;
- const GLint desty = y;
- GLint row, drawWidth;
-
- 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) {
- gl_error( ctx, GL_INVALID_ENUM, "glDrawPixels(stencil type)");
- return;
- }
-
- drawWidth = (width > MAX_WIDTH) ? MAX_WIDTH : width;
-
- for (row = 0; row < height; row++, y++) {
- GLstencil values[MAX_WIDTH];
- GLenum destType = (sizeof(GLstencil) == sizeof(GLubyte))
- ? GL_UNSIGNED_BYTE : GL_UNSIGNED_SHORT;
- const GLvoid *source = _mesa_image_address(&ctx->Unpack,
- pixels, width, height, GL_COLOR_INDEX, type, 0, row, 0);
- _mesa_unpack_index_span(ctx, drawWidth, destType, values,
- type, source, &ctx->Unpack,
- ctx->ImageTransferState);
- if (ctx->ImageTransferState & IMAGE_SHIFT_OFFSET_BIT) {
- _mesa_shift_and_offset_stencil( ctx, drawWidth, values );
- }
- if (ctx->Pixel.MapStencilFlag) {
- _mesa_map_stencil( ctx, drawWidth, values );
- }
-
- if (zoom) {
- gl_write_zoomed_stencil_span( ctx, (GLuint) drawWidth, x, y,
- values, desty );
- }
- else {
- _mesa_write_stencil_span( ctx, (GLuint) drawWidth, x, y, values );
- }
- }
-}
-
-
-
-/*
- * Do a glDrawPixels of depth values.
- */
-static void
-draw_depth_pixels( GLcontext *ctx, GLint x, GLint y,
- GLsizei width, GLsizei height,
- 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 GLint desty = y;
- GLchan rgba[MAX_WIDTH][4];
- GLuint ispan[MAX_WIDTH];
- GLint drawWidth = (width > MAX_WIDTH) ? MAX_WIDTH : width;
-
- 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) {
- gl_error(ctx, GL_INVALID_ENUM, "glDrawPixels(type)");
- return;
- }
-
- /* Colors or indexes */
- if (ctx->Visual.RGBAflag) {
- GLint r = FLOAT_TO_CHAN(ctx->Current.RasterColor[0]);
- GLint g = FLOAT_TO_CHAN(ctx->Current.RasterColor[1]);
- GLint b = FLOAT_TO_CHAN(ctx->Current.RasterColor[2]);
- GLint a = FLOAT_TO_CHAN(ctx->Current.RasterColor[3]);
- GLint i;
- for (i = 0; i < drawWidth; i++) {
- rgba[i][RCOMP] = r;
- rgba[i][GCOMP] = g;
- rgba[i][BCOMP] = b;
- rgba[i][ACOMP] = a;
- }
- }
- else {
- GLint i;
- for (i = 0; i < drawWidth; i++) {
- ispan[i] = ctx->Current.RasterIndex;
- }
- }
-
- if (type==GL_UNSIGNED_SHORT && sizeof(GLdepth)==sizeof(GLushort)
- && !bias_or_scale && !zoom && ctx->Visual.RGBAflag) {
- /* Special case: directly write 16-bit depth values */
- GLint row;
- for (row = 0; row < height; row++, y++) {
- GLdepth zspan[MAX_WIDTH];
- const GLushort *zptr = _mesa_image_address(&ctx->Unpack,
- pixels, width, height, GL_DEPTH_COMPONENT, type, 0, row, 0);
- GLint i;
- for (i = 0; i < width; i++)
- zspan[i] = zptr[i];
- gl_write_rgba_span( ctx, width, x, y, zspan, 0, rgba, GL_BITMAP );
- }
- }
- else if (type==GL_UNSIGNED_INT && ctx->Visual.DepthBits == 32
- && !bias_or_scale && !zoom && ctx->Visual.RGBAflag) {
- /* Special case: directly write 32-bit depth values */
- GLint row;
- for (row = 0; row < height; row++, y++) {
- const GLuint *zptr = _mesa_image_address(&ctx->Unpack,
- pixels, width, height, GL_DEPTH_COMPONENT, type, 0, row, 0);
- gl_write_rgba_span( ctx, width, x, y, zptr, 0, rgba, GL_BITMAP );
- }
- }
- else {
- /* General case */
- GLint row;
- for (row = 0; row < height; row++, y++) {
- GLdepth zspan[MAX_WIDTH];
- const GLvoid *src = _mesa_image_address(&ctx->Unpack,
- pixels, width, height, GL_DEPTH_COMPONENT, type, 0, row, 0);
- _mesa_unpack_depth_span( ctx, drawWidth, zspan, type, src,
- &ctx->Unpack, ctx->ImageTransferState );
- if (ctx->Visual.RGBAflag) {
- if (zoom) {
- gl_write_zoomed_rgba_span(ctx, width, x, y, zspan, 0,
- (const GLchan (*)[4]) rgba, desty);
- }
- else {
- gl_write_rgba_span(ctx, width, x, y, zspan, 0, rgba, GL_BITMAP);
- }
- }
- else {
- if (zoom) {
- gl_write_zoomed_index_span(ctx, width, x, y, zspan, 0,
- ispan, GL_BITMAP);
- }
- else {
- gl_write_index_span(ctx, width, x, y, zspan, 0,
- ispan, GL_BITMAP);
- }
- }
-
- }
- }
-}
-
-
-/*
- * Do glDrawPixels of RGBA pixels.
- */
-static void
-draw_rgba_pixels( GLcontext *ctx, GLint x, GLint y,
- GLsizei width, GLsizei height,
- GLenum format, GLenum type, const GLvoid *pixels )
-{
- const struct gl_pixelstore_attrib *unpack = &ctx->Unpack;
- const GLboolean zoom = ctx->Pixel.ZoomX!=1.0 || ctx->Pixel.ZoomY!=1.0;
- const GLint desty = y;
- GLdepth zspan[MAX_WIDTH];
- GLboolean quickDraw;
- GLfloat *convImage = NULL;
- GLuint transferOps = ctx->ImageTransferState;
-
- if (!_mesa_is_legal_format_and_type(format, type)) {
- gl_error(ctx, GL_INVALID_ENUM, "glDrawPixels(format or type)");
- return;
- }
-
- /* Try an optimized glDrawPixels first */
- if (fast_draw_pixels(ctx, x, y, width, height, format, type, pixels))
- return;
-
- /* Fragment depth values */
- if (ctx->Depth.Test || ctx->Fog.Enabled) {
- /* fill in array of z values */
- GLdepth z = (GLdepth) (ctx->Current.RasterPos[2] * ctx->Visual.DepthMaxF);
- GLint i;
- for (i=0;i<width;i++) {
- zspan[i] = z;
- }
- }
-
-
- if (ctx->RasterMask == 0 && !zoom && x >= 0 && y >= 0
- && x + width <= ctx->DrawBuffer->Width
- && y + height <= ctx->DrawBuffer->Height) {
- quickDraw = GL_TRUE;
- }
- else {
- quickDraw = GL_FALSE;
- }
-
- if (ctx->Pixel.Convolution2DEnabled || ctx->Pixel.Separable2DEnabled) {
- /* Convolution has to be handled specially. We'll create an
- * intermediate image, applying all pixel transfer operations
- * up to convolution. Then we'll convolve the image. Then
- * we'll proceed with the rest of the transfer operations and
- * rasterize the image.
- */
- GLint row;
- GLfloat *dest, *tmpImage;
-
- tmpImage = (GLfloat *) MALLOC(width * height * 4 * sizeof(GLfloat));
- if (!tmpImage) {
- gl_error(ctx, GL_OUT_OF_MEMORY, "glDrawPixels");
- return;
- }
- convImage = (GLfloat *) MALLOC(width * height * 4 * sizeof(GLfloat));
- if (!convImage) {
- FREE(tmpImage);
- gl_error(ctx, GL_OUT_OF_MEMORY, "glDrawPixels");
- return;
- }
-
- /* Unpack the image and apply transfer ops up to convolution */
- dest = tmpImage;
- for (row = 0; row < height; row++) {
- const GLvoid *source = _mesa_image_address(unpack,
- pixels, width, height, format, type, 0, row, 0);
- _mesa_unpack_float_color_span(ctx, width, GL_RGBA, (void *) dest,
- format, type, source, unpack,
- transferOps & IMAGE_PRE_CONVOLUTION_BITS,
- GL_FALSE);
- dest += width * 4;
- }
-
- /* do convolution */
- if (ctx->Pixel.Convolution2DEnabled) {
- _mesa_convolve_2d_image(ctx, &width, &height, tmpImage, convImage);
- }
- else {
- ASSERT(ctx->Pixel.Separable2DEnabled);
- _mesa_convolve_sep_image(ctx, &width, &height, tmpImage, convImage);
- }
- FREE(tmpImage);
-
- /* continue transfer ops and draw the convolved image */
- unpack = &_mesa_native_packing;
- pixels = convImage;
- format = GL_RGBA;
- type = GL_FLOAT;
- transferOps &= IMAGE_POST_CONVOLUTION_BITS;
- }
-
- /*
- * General solution
- */
- {
- GLchan rgba[MAX_WIDTH][4];
- GLint row;
- if (width > MAX_WIDTH)
- width = MAX_WIDTH;
- for (row = 0; row < height; row++, y++) {
- const GLvoid *source = _mesa_image_address(unpack,
- pixels, width, height, format, type, 0, row, 0);
- _mesa_unpack_chan_color_span(ctx, width, GL_RGBA, (void*) rgba,
- format, type, source, unpack,
- transferOps);
- if ((ctx->Pixel.MinMaxEnabled && ctx->MinMax.Sink) ||
- (ctx->Pixel.HistogramEnabled && ctx->Histogram.Sink))
- continue;
-
- if (ctx->Texture.ReallyEnabled && ctx->Pixel.PixelTextureEnabled) {
- GLfloat s[MAX_WIDTH], t[MAX_WIDTH], r[MAX_WIDTH], q[MAX_WIDTH];
- GLchan primary_rgba[MAX_WIDTH][4];
- GLuint unit;
- /* XXX not sure how multitexture is supposed to work here */
-
- MEMCPY(primary_rgba, rgba, 4 * width * sizeof(GLchan));
-
- for (unit = 0; unit < ctx->Const.MaxTextureUnits; unit++) {
- if (ctx->Texture.Unit[unit].ReallyEnabled) {
- _mesa_pixeltexgen(ctx, width, (const GLchan (*)[4]) rgba,
- s, t, r, q);
- gl_texture_pixels(ctx, unit, width, s, t, r, NULL,
- primary_rgba, rgba);
- }
- }
- }
-
- if (quickDraw) {
- (*ctx->Driver.WriteRGBASpan)( ctx, width, x, y,
- (CONST GLchan (*)[]) rgba, NULL);
- }
- else if (zoom) {
- gl_write_zoomed_rgba_span( ctx, width, x, y, zspan, 0,
- (CONST GLchan (*)[]) rgba, desty );
- }
- else {
- gl_write_rgba_span( ctx, (GLuint) width, x, y, zspan, 0,
- rgba, GL_BITMAP);
- }
- }
- }
-
- if (convImage) {
- FREE(convImage);
- }
-}
-
/*
@@ -872,42 +70,16 @@ _mesa_DrawPixels( GLsizei width, GLsizei height,
ctx->OcclusionResult = GL_TRUE;
/* see if device driver can do the drawpix */
+ RENDER_START(ctx);
+
if (ctx->Driver.DrawPixels
&& (*ctx->Driver.DrawPixels)(ctx, x, y, width, height, format, type,
&ctx->Unpack, pixels)) {
- return;
- }
+ /* finished */
+ } else
+ _swrast_DrawPixels( ctx, x, y, width, height, format, type,
+ &ctx->Unpack, pixels );
- RENDER_START(ctx);
- switch (format) {
- case GL_STENCIL_INDEX:
- draw_stencil_pixels( ctx, x, y, width, height, type, pixels );
- break;
- case GL_DEPTH_COMPONENT:
- draw_depth_pixels( ctx, x, y, width, height, type, pixels );
- break;
- case GL_COLOR_INDEX:
- if (ctx->Visual.RGBAflag)
- draw_rgba_pixels(ctx, x,y, width, height, format, type, pixels);
- else
- draw_index_pixels(ctx, x, y, width, height, type, pixels);
- break;
- case GL_RED:
- case GL_GREEN:
- case GL_BLUE:
- case GL_ALPHA:
- case GL_LUMINANCE:
- case GL_LUMINANCE_ALPHA:
- case GL_RGB:
- case GL_BGR:
- case GL_RGBA:
- case GL_BGRA:
- case GL_ABGR_EXT:
- draw_rgba_pixels(ctx, x, y, width, height, format, type, pixels);
- break;
- default:
- gl_error( ctx, GL_INVALID_ENUM, "glDrawPixels(format)" );
- }
RENDER_FINISH(ctx);
}
else if (ctx->RenderMode==GL_FEEDBACK) {
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-14 05:01:49 +0000