-/* $Id: drawpix.c,v 1.2 1999/09/18 20:41:22 keithw Exp $ */
+/* $Id: drawpix.c,v 1.17 2000/04/07 16:27:26 brianp Exp $ */
/*
* Mesa 3-D graphics library
- * Version: 3.1
+ * Version: 3.3
*
- * Copyright (C) 1999 Brian Paul All Rights Reserved.
+ * Copyright (C) 1999-2000 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"),
*/
-
-
-
#ifdef PC_HEADER
#include "all.h"
#else
-#include <assert.h>
-#include <stdlib.h>
-#include <string.h>
+#include "glheader.h"
#include "context.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"
-#ifdef XFree86Server
-#include "GL/xf86glx.h"
-#endif
#endif
-/* TODO: apply texture mapping to fragments */
+/*
+ * 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 - 1);
+
+ 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 - 1);
+
+ if (*height <= 0)
+ return GL_TRUE;
+
+ return GL_TRUE;
+}
+
/*
- * Try to do a fast glDrawPixels. Conditions include:
- * not using a display list
- * simple pixel unpacking
- * no raster ops
- * etc....
+ * Try to do a fast and simple RGB(a) glDrawPixels.
* Return: GL_TRUE if success, GL_FALSE if slow path must be used instead
*/
-GLboolean gl_direct_DrawPixels( GLcontext *ctx,
- const struct gl_pixelstore_attrib *unpack,
- GLsizei width, GLsizei height,
- GLenum format, GLenum type,
- const GLvoid *pixels )
+static GLboolean
+simple_DrawPixels( 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;
GLubyte rgb[MAX_WIDTH][3];
GLubyte rgba[MAX_WIDTH][4];
gl_update_state(ctx);
}
- /* see if device driver can do the drawpix */
- if (ctx->Driver.DrawPixels) {
- GLint x = (GLint) (ctx->Current.RasterPos[0] + 0.5F);
- GLint y = (GLint) (ctx->Current.RasterPos[1] + 0.5F);
- if ((*ctx->Driver.DrawPixels)(ctx, x, y, width, height, format, type,
- unpack, pixels))
- return GL_TRUE;
- }
-
if ((ctx->RasterMask&(~(SCISSOR_BIT|WINCLIP_BIT)))==0
&& ctx->Pixel.RedBias==0.0 && ctx->Pixel.RedScale==1.0
&& ctx->Pixel.GreenBias==0.0 && ctx->Pixel.GreenScale==1.0
&& ctx->Pixel.AlphaBias==0.0 && ctx->Pixel.AlphaScale==1.0
&& ctx->Pixel.IndexShift==0 && ctx->Pixel.IndexOffset==0
&& ctx->Pixel.MapColorFlag==0
+ && ctx->Texture.ReallyEnabled == 0
&& unpack->Alignment==1
&& !unpack->SwapBytes
&& !unpack->LsbFirst) {
- GLint destX = (GLint) (ctx->Current.RasterPos[0] + 0.5F);
- GLint destY = (GLint) (ctx->Current.RasterPos[1] + 0.5F);
+ GLint destX = x;
+ GLint destY = y;
GLint drawWidth = width; /* actual width drawn */
GLint drawHeight = height; /* actual height drawn */
GLint skipPixels = unpack->SkipPixels;
*/
if (ctx->Pixel.ZoomX==1.0F && ctx->Pixel.ZoomY==1.0F) {
/* horizontal clipping */
- if (destX < ctx->Buffer->Xmin) {
- skipPixels += (ctx->Buffer->Xmin - destX);
- drawWidth -= (ctx->Buffer->Xmin - destX);
- destX = ctx->Buffer->Xmin;
+ if (destX < ctx->DrawBuffer->Xmin) {
+ skipPixels += (ctx->DrawBuffer->Xmin - destX);
+ drawWidth -= (ctx->DrawBuffer->Xmin - destX);
+ destX = ctx->DrawBuffer->Xmin;
}
- if (destX + drawWidth > ctx->Buffer->Xmax)
- drawWidth -= (destX + drawWidth - ctx->Buffer->Xmax - 1);
+ if (destX + drawWidth > ctx->DrawBuffer->Xmax)
+ drawWidth -= (destX + drawWidth - ctx->DrawBuffer->Xmax - 1);
if (drawWidth <= 0)
return GL_TRUE;
/* vertical clipping */
- if (destY < ctx->Buffer->Ymin) {
- skipRows += (ctx->Buffer->Ymin - destY);
- drawHeight -= (ctx->Buffer->Ymin - destY);
- destY = ctx->Buffer->Ymin;
+ if (destY < ctx->DrawBuffer->Ymin) {
+ skipRows += (ctx->DrawBuffer->Ymin - destY);
+ drawHeight -= (ctx->DrawBuffer->Ymin - destY);
+ destY = ctx->DrawBuffer->Ymin;
}
- if (destY + drawHeight > ctx->Buffer->Ymax)
- drawHeight -= (destY + drawHeight - ctx->Buffer->Ymax - 1);
+ if (destY + drawHeight > ctx->DrawBuffer->Ymax)
+ drawHeight -= (destY + drawHeight - ctx->DrawBuffer->Ymax - 1);
if (drawHeight <= 0)
return GL_TRUE;
+
+ zoomY0 = 0; /* not used - silence compiler warning */
}
else {
/* setup array of fragment Z value to pass to zoom function */
- GLdepth z = (GLdepth) (ctx->Current.RasterPos[2] * DEPTH_SCALE);
+ GLdepth z = (GLdepth) (ctx->Current.RasterPos[2] * ctx->Visual->DepthMaxF);
GLint i;
assert(drawWidth < MAX_WIDTH);
for (i=0; i<drawWidth; i++)
return GL_FALSE;
}
}
- else {
- /* can't do direct render, have to use slow path */
- 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,
- const struct gl_image *image )
+static void
+draw_index_pixels( GLcontext *ctx, GLint x, GLint y,
+ GLsizei width, GLsizei height,
+ GLenum type, const GLvoid *pixels )
{
- GLint width, height, widthInBytes;
+ const GLboolean zoom = ctx->Pixel.ZoomX!=1.0 || ctx->Pixel.ZoomY!=1.0;
const GLint desty = y;
- GLint i, j;
+ GLint row, drawWidth;
GLdepth zspan[MAX_WIDTH];
- const GLboolean zoom = ctx->Pixel.ZoomX!=1.0 || ctx->Pixel.ZoomY!=1.0;
- assert(image);
- assert(image->Format == GL_COLOR_INDEX);
-
- width = image->Width;
- height = image->Height;
- if (image->Type == GL_BITMAP)
- widthInBytes = (width + 7) / 8;
- else
- widthInBytes = width;
+ drawWidth = (width > MAX_WIDTH) ? MAX_WIDTH : width;
/* Fragment depth values */
- if (ctx->Depth.Test) {
- GLdepth zval = (GLdepth) (ctx->Current.RasterPos[2] * DEPTH_SCALE);
- for (i=0;i<width;i++) {
+ 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;
}
}
- /* process the image row by row */
- for (i=0;i<height;i++,y++) {
- GLuint ispan[MAX_WIDTH];
-
- /* convert to uints */
- switch (image->Type) {
- case GL_UNSIGNED_BYTE:
- {
- GLubyte *src = (GLubyte *) image->Data + i * width;
- for (j=0;j<width;j++) {
- ispan[j] = (GLuint) *src++;
- }
- }
- break;
- case GL_FLOAT:
- {
- GLfloat *src = (GLfloat *) image->Data + i * width;
- for (j=0;j<width;j++) {
- ispan[j] = (GLuint) (GLint) *src++;
- }
- }
- break;
- case GL_BITMAP:
- {
- GLubyte *src = (GLubyte *) image->Data + i * widthInBytes;
- for (j=0;j<width;j++) {
- ispan[j] = ( src[j >> 3] >> (7 - (j & 0x7)) ) & 1;
- }
- }
- break;
- default:
- gl_problem( ctx, "draw_index_pixels type" );
- return;
- }
-
- /* apply shift and offset */
- if (ctx->Pixel.IndexOffset || ctx->Pixel.IndexShift) {
- gl_shift_and_offset_ci( ctx, width, ispan );
- }
-
- if (ctx->Visual->RGBAflag) {
- /* Convert index to RGBA and write to frame buffer */
- GLubyte rgba[MAX_WIDTH][4];
- gl_map_ci_to_rgba( ctx, width, ispan, rgba );
- if (zoom) {
- gl_write_zoomed_rgba_span( ctx, width, x, y, zspan,
- (const GLubyte (*)[4])rgba, desty );
- }
- else {
- gl_write_rgba_span( ctx, width, x, y, zspan, rgba, GL_BITMAP );
- }
+ /*
+ * 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, GL_TRUE);
+ if (zoom) {
+ gl_write_zoomed_index_span(ctx, drawWidth, x, y, zspan, indexes, desty);
}
else {
- /* optionally apply index map then write to frame buffer */
- if (ctx->Pixel.MapColorFlag) {
- gl_map_ci(ctx, width, ispan);
- }
- if (zoom) {
- gl_write_zoomed_index_span( ctx, width, x, y, zspan, ispan, desty );
- }
- else {
- gl_write_index_span( ctx, width, x, y, zspan, ispan, GL_BITMAP );
- }
+ gl_write_index_span(ctx, drawWidth, x, y, zspan, 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,
- const struct gl_image *image )
+static void
+draw_stencil_pixels( GLcontext *ctx, GLint x, GLint y,
+ GLsizei width, GLsizei height,
+ GLenum type, const GLvoid *pixels )
{
- GLint widthInBytes, width, height;
- const GLint desty = y;
- GLint i;
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;
+ }
- assert(image);
- assert(image->Format == GL_STENCIL_INDEX);
- assert(image->Type == GL_UNSIGNED_BYTE || image->Type == GL_BITMAP);
-
- if (image->Type == GL_UNSIGNED_BYTE)
- widthInBytes = image->Width;
- else
- widthInBytes = (image->Width + 7) / 8;
- width = image->Width;
- height = image->Height;
-
- /* process the image row by row */
- for (i=0;i<height;i++,y++) {
- GLstencil *src = (GLstencil*)image->Data + i * widthInBytes;
- GLstencil *stencilValues;
- GLstencil stencilCopy[MAX_WIDTH];
-
- if (image->Type == GL_BITMAP) {
- /* convert bitmap data to GLubyte (0 or 1) data */
- GLint j;
- for (j = 0; j < width; j++) {
- stencilCopy[j] = ( src[j >> 3] >> (7 - (j & 0x7)) ) & 1;
- }
- src = stencilCopy;
- }
-
- if (ctx->Pixel.IndexOffset || ctx->Pixel.IndexShift
- || ctx->Pixel.MapStencilFlag) {
-
- /* make copy of stencil values */
- if (src != stencilCopy)
- MEMCPY( stencilCopy, src, width * sizeof(GLstencil));
-
- /* apply shift and offset */
- if (ctx->Pixel.IndexOffset || ctx->Pixel.IndexShift) {
- gl_shift_and_offset_stencil( ctx, width, stencilCopy );
- }
+ drawWidth = (width > MAX_WIDTH) ? MAX_WIDTH : width;
- /* mapping */
- if (ctx->Pixel.MapStencilFlag) {
- gl_map_stencil( ctx, width, stencilCopy );
- }
+ 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, GL_TRUE);
- stencilValues = stencilCopy;
- }
- else {
- /* use stencil values in-place */
- stencilValues = src;
- }
-
- /* write stencil values to stencil buffer */
if (zoom) {
- gl_write_zoomed_stencil_span( ctx, (GLuint) width, x, y,
- stencilValues, desty );
+ gl_write_zoomed_stencil_span( ctx, (GLuint) drawWidth, x, y,
+ values, desty );
}
else {
- gl_write_stencil_span( ctx, (GLuint) width, x, y, stencilValues );
+ gl_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,
- const struct gl_image *image )
+static void
+draw_depth_pixels( GLcontext *ctx, GLint x, GLint y,
+ GLsizei width, GLsizei height,
+ GLenum type, const GLvoid *pixels )
{
- GLint width, height;
+ 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;
GLubyte rgba[MAX_WIDTH][4];
GLuint ispan[MAX_WIDTH];
- 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;
-
- assert(image);
- assert(image->Format == GL_DEPTH_COMPONENT);
-
- width = image->Width;
- height = image->Height;
+ GLint drawWidth = (width > MAX_WIDTH) ? MAX_WIDTH : width;
+
+ if (type != GL_UNSIGNED_BYTE
+ && type != GL_UNSIGNED_BYTE
+ && type != GL_UNSIGNED_SHORT
+ && type != GL_UNSIGNED_SHORT
+ && type != GL_UNSIGNED_INT
+ && type != GL_UNSIGNED_INT
+ && type != GL_FLOAT) {
+ gl_error(ctx, GL_INVALID_ENUM, "glDrawPixels(type)");
+ return;
+ }
- /* Color or index */
+ /* Colors or indexes */
if (ctx->Visual->RGBAflag) {
GLint r = (GLint) (ctx->Current.RasterColor[0] * 255.0F);
GLint g = (GLint) (ctx->Current.RasterColor[1] * 255.0F);
GLint b = (GLint) (ctx->Current.RasterColor[2] * 255.0F);
GLint a = (GLint) (ctx->Current.RasterColor[3] * 255.0F);
GLint i;
- for (i=0; i<width; i++) {
+ for (i = 0; i < drawWidth; i++) {
rgba[i][RCOMP] = r;
rgba[i][GCOMP] = g;
rgba[i][BCOMP] = b;
}
else {
GLint i;
- for (i=0;i<width;i++) {
+ for (i = 0; i < drawWidth; i++) {
ispan[i] = ctx->Current.RasterIndex;
}
}
- if (image->Type==GL_UNSIGNED_SHORT && sizeof(GLdepth)==sizeof(GLushort)
+ 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 j;
- for (j=0;j<height;j++,y++) {
- GLdepth *zptr = (GLdepth *) image->Data + j * width;
- gl_write_rgba_span( ctx, width, x, y, zptr, rgba, GL_BITMAP );
+ 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, rgba, GL_BITMAP );
}
}
- else if (image->Type==GL_UNSIGNED_INT && sizeof(GLdepth)==sizeof(GLuint)
+ 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 i, j;
- /* Compute shift value to scale 32-bit uints down to depth values. */
- GLuint shift = 0;
- GLuint max = MAX_DEPTH;
- while ((max&0x80000000)==0) {
- max = max << 1;
- shift++;
- }
- for (j=0;j<height;j++,y++) {
- GLdepth zspan[MAX_WIDTH];
- GLuint *zptr = (GLuint *) image->Data + j * width;
- for (i=0;i<width;i++) {
- zspan[i] = zptr[i] >> shift;
- }
- gl_write_rgba_span( ctx, width, x, y, zspan, rgba, GL_BITMAP );
+ 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, rgba, GL_BITMAP );
}
}
else {
- /* General case (slower) */
- GLint i, j;
-
- /* process image row by row */
- for (i=0;i<height;i++,y++) {
- GLfloat depth[MAX_WIDTH];
+ /* General case */
+ GLint row;
+ for (row = 0; row < height; row++, y++) {
GLdepth zspan[MAX_WIDTH];
-
- switch (image->Type) {
- case GL_UNSIGNED_SHORT:
- {
- GLushort *src = (GLushort *) image->Data + i * width;
- for (j=0;j<width;j++) {
- depth[j] = USHORT_TO_FLOAT( *src++ );
- }
- }
- break;
- case GL_UNSIGNED_INT:
- {
- GLuint *src = (GLuint *) image->Data + i * width;
- for (j=0;j<width;j++) {
- depth[j] = UINT_TO_FLOAT( *src++ );
- }
- }
- break;
- case GL_FLOAT:
- {
- GLfloat *src = (GLfloat *) image->Data + i * width;
- for (j=0;j<width;j++) {
- depth[j] = *src++;
- }
- }
- break;
- default:
- gl_problem(ctx, "Bad type in draw_depth_pixels");
- return;
- }
-
- /* apply depth scale and bias */
- if (ctx->Pixel.DepthScale!=1.0 || ctx->Pixel.DepthBias!=0.0) {
- for (j=0;j<width;j++) {
- depth[j] = depth[j] * ctx->Pixel.DepthScale + ctx->Pixel.DepthBias;
- }
- }
-
- /* clamp depth values to [0,1] and convert from floats to integers */
- for (j=0;j<width;j++) {
- zspan[j] = (GLdepth) (CLAMP( depth[j], 0.0F, 1.0F ) * DEPTH_SCALE);
- }
-
+ 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, GL_TRUE );
if (ctx->Visual->RGBAflag) {
if (zoom) {
- gl_write_zoomed_rgba_span( ctx, width, x, y, zspan,
- (const GLubyte (*)[4])rgba, desty );
+ gl_write_zoomed_rgba_span(ctx, width, x, y, zspan,
+ (const GLubyte (*)[4])rgba, desty);
}
else {
- gl_write_rgba_span( ctx, width, x, y, zspan, rgba, GL_BITMAP );
+ gl_write_rgba_span(ctx, width, x, y, zspan, rgba, GL_BITMAP);
}
}
else {
if (zoom) {
- gl_write_zoomed_index_span( ctx, width, x, y, zspan,
- ispan, GL_BITMAP );
+ gl_write_zoomed_index_span(ctx, width, x, y, zspan,
+ ispan, GL_BITMAP);
}
else {
- gl_write_index_span( ctx, width, x, y, zspan, ispan, GL_BITMAP );
+ gl_write_index_span(ctx, width, x, y, zspan, ispan, GL_BITMAP);
}
}
}
-
-/* Simple unpacking parameters: */
-static struct gl_pixelstore_attrib NoUnpack = {
- 1, /* Alignment */
- 0, /* RowLength */
- 0, /* SkipPixels */
- 0, /* SkipRows */
- 0, /* ImageHeight */
- 0, /* SkipImages */
- GL_FALSE, /* SwapBytes */
- GL_FALSE /* LsbFirst */
-};
-
-
/*
* Do glDrawPixels of RGBA pixels.
*/
-static void draw_rgba_pixels( GLcontext *ctx, GLint x, GLint y,
- const struct gl_image *image )
+static void
+draw_rgba_pixels( GLcontext *ctx, GLint x, GLint y,
+ GLsizei width, GLsizei height,
+ GLenum format, GLenum type, const GLvoid *pixels )
{
- GLint width, height;
- GLint i, j;
+ 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;
- const GLboolean zoom = ctx->Pixel.ZoomX!=1.0 || ctx->Pixel.ZoomY!=1.0;
-
- assert(image);
/* Try an optimized glDrawPixels first */
- if (gl_direct_DrawPixels(ctx, &NoUnpack, image->Width, image->Height,
- image->Format, image->Type, image->Data ))
+ if (simple_DrawPixels(ctx, x, y, width, height, format, type, pixels))
return;
- width = image->Width;
- height = image->Height;
-
/* Fragment depth values */
- if (ctx->Depth.Test) {
+ if (ctx->Depth.Test || ctx->Fog.Enabled) {
/* fill in array of z values */
- GLdepth z = (GLdepth) (ctx->Current.RasterPos[2] * DEPTH_SCALE);
+ 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->Buffer->Width && y+height<=ctx->Buffer->Height) {
+
+ 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;
}
+ /*
+ * General solution
+ */
{
- /* General solution */
- GLboolean r_flag, g_flag, b_flag, a_flag, l_flag;
- GLuint components;
GLubyte rgba[MAX_WIDTH][4];
- GLfloat rf[MAX_WIDTH];
- GLfloat gf[MAX_WIDTH];
- GLfloat bf[MAX_WIDTH];
- DEFARRAY(GLfloat,af,MAX_WIDTH);
- CHECKARRAY(af,return);
-
- r_flag = g_flag = b_flag = a_flag = l_flag = GL_FALSE;
- switch (image->Format) {
- case GL_RED:
- r_flag = GL_TRUE;
- components = 1;
- break;
- case GL_GREEN:
- g_flag = GL_TRUE;
- components = 1;
- break;
- case GL_BLUE:
- b_flag = GL_TRUE;
- components = 1;
- break;
- case GL_ALPHA:
- a_flag = GL_TRUE;
- components = 1;
- break;
- case GL_RGB:
- r_flag = g_flag = b_flag = GL_TRUE;
- components = 3;
- break;
- case GL_LUMINANCE:
- l_flag = GL_TRUE;
- components = 1;
- break;
- case GL_LUMINANCE_ALPHA:
- l_flag = a_flag = GL_TRUE;
- components = 2;
- break;
- case GL_RGBA:
- r_flag = g_flag = b_flag = a_flag = GL_TRUE;
- components = 4;
- break;
- default:
- gl_problem(ctx, "Bad type in draw_rgba_pixels");
- goto cleanup;
- }
+ 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_ubyte_color_span(ctx, width, GL_RGBA, (void*) rgba,
+ format, type, source, unpack, GL_TRUE);
+
+ if (ctx->Texture.ReallyEnabled && ctx->Pixel.PixelTextureEnabled) {
+ GLfloat s[MAX_WIDTH], t[MAX_WIDTH], r[MAX_WIDTH], q[MAX_WIDTH];
+ GLuint unit;
+ /* XXX not sure how multitexture is supposed to work here */
+ for (unit = 0; unit < MAX_TEXTURE_UNITS; unit++) {
+ _mesa_pixeltexgen(ctx, width, (const GLubyte (*)[4]) rgba,
+ s, t, r, q);
+ gl_texture_pixels(ctx, unit, width, s, t, r, NULL, rgba);
+ }
+ }
- /* process the image row by row */
- for (i=0;i<height;i++,y++) {
- /* convert to floats */
- switch (image->Type) {
- case GL_UNSIGNED_BYTE:
- {
- GLubyte *src = (GLubyte *) image->Data + i * width * components;
- for (j=0;j<width;j++) {
- if (l_flag) {
- rf[j] = gf[j] = bf[j] = UBYTE_TO_FLOAT(*src++);
- }
- else {
- rf[j] = r_flag ? UBYTE_TO_FLOAT(*src++) : 0.0;
- gf[j] = g_flag ? UBYTE_TO_FLOAT(*src++) : 0.0;
- bf[j] = b_flag ? UBYTE_TO_FLOAT(*src++) : 0.0;
- }
- af[j] = a_flag ? UBYTE_TO_FLOAT(*src++) : 1.0;
- }
- }
- break;
- case GL_FLOAT:
- {
- GLfloat *src = (GLfloat *) image->Data + i * width * components;
- for (j=0;j<width;j++) {
- if (l_flag) {
- rf[j] = gf[j] = bf[j] = *src++;
- }
- else {
- rf[j] = r_flag ? *src++ : 0.0;
- gf[j] = g_flag ? *src++ : 0.0;
- bf[j] = b_flag ? *src++ : 0.0;
- }
- af[j] = a_flag ? *src++ : 1.0;
- }
- }
- break;
- default:
- gl_problem( ctx, "draw_rgba_pixels type" );
- goto cleanup;
- }
-
- /* apply scale and bias */
- if (ctx->Pixel.ScaleOrBiasRGBA) {
- gl_scale_and_bias_color(ctx, width, rf, gf, bf, af);
- }
-
- /* apply pixel mappings */
- if (ctx->Pixel.MapColorFlag) {
- gl_map_color(ctx, width, rf, gf, bf, af);
- }
-
- /* convert to integers */
- for (j=0;j<width;j++) {
- rgba[j][RCOMP] = (GLint) (rf[j] * 255.0F);
- rgba[j][GCOMP] = (GLint) (gf[j] * 255.0F);
- rgba[j][BCOMP] = (GLint) (bf[j] * 255.0F);
- rgba[j][ACOMP] = (GLint) (af[j] * 255.0F);
- }
-
- /* write to frame buffer */
if (quickDraw) {
- (*ctx->Driver.WriteRGBASpan)( ctx, width, x, y,
- (const GLubyte (*)[4])rgba, NULL);
+ (*ctx->Driver.WriteRGBASpan)( ctx, width, x, y,
+ (CONST GLubyte (*)[]) rgba, NULL);
}
else if (zoom) {
gl_write_zoomed_rgba_span( ctx, width, x, y, zspan,
- (const GLubyte (*)[4])rgba, desty );
+ (CONST GLubyte (*)[]) rgba, desty );
}
else {
gl_write_rgba_span( ctx, (GLuint) width, x, y, zspan, rgba, GL_BITMAP);
}
}
-cleanup:
- UNDEFARRAY(af);
}
}
/*
* Execute glDrawPixels
*/
-void gl_DrawPixels( GLcontext* ctx, struct gl_image *image )
+void
+_mesa_DrawPixels( GLsizei width, GLsizei height,
+ GLenum format, GLenum type, const GLvoid *pixels )
{
+ GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glDrawPixels");
-
- if (gl_image_error_test( ctx, image, "glDrawPixels" ))
- return;
-
if (ctx->RenderMode==GL_RENDER) {
GLint x, y;
- if (!ctx->Current.RasterPosValid) {
+ if (!pixels || !ctx->Current.RasterPosValid) {
return;
}
x = (GLint) (ctx->Current.RasterPos[0] + 0.5F);
y = (GLint) (ctx->Current.RasterPos[1] + 0.5F);
- switch (image->Format) {
- case GL_COLOR_INDEX:
- draw_index_pixels( ctx, x, y, image );
- break;
+ ctx->OcclusionResult = GL_TRUE;
+
+ /* see if device driver can do the drawpix */
+ if (ctx->Driver.DrawPixels
+ && (*ctx->Driver.DrawPixels)(ctx, x, y, width, height, format, type,
+ &ctx->Unpack, pixels)) {
+ return;
+ }
+
+ switch (format) {
case GL_STENCIL_INDEX:
- draw_stencil_pixels( ctx, x, y, image );
+ draw_stencil_pixels( ctx, x, y, width, height, type, pixels );
break;
case GL_DEPTH_COMPONENT:
- draw_depth_pixels( ctx, x, y, image );
+ 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_RGB:
case GL_LUMINANCE:
case GL_LUMINANCE_ALPHA:
+ case GL_RGB:
+ case GL_BGR:
case GL_RGBA:
- draw_rgba_pixels( ctx, x, y, image );
+ 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" );
+ gl_error( ctx, GL_INVALID_ENUM, "glDrawPixels(format)" );
return;
}
}
projects / mesa.git / blobdiff