teximage.h File Reference

#include "types.h"

Include dependency graph for teximage.h:

This graph shows which files directly or indirectly include this file:

Go to the source code of this file.

Functions
struct gl_texture_image *	gl_alloc_texture_image (void)
void	gl_free_texture_image (struct gl_texture_image *teximage)
struct gl_image *	gl_unpack_texsubimage (GLcontext *ctx, GLint width, GLint height, GLenum format, GLenum type, const GLvoid *pixels)
struct gl_texture_image *	gl_unpack_texture (GLcontext *ctx, GLint dimensions, GLenum target, GLint level, GLint internalformat, GLsizei width, GLsizei height, GLint border, GLenum format, GLenum type, const GLvoid *pixels)
struct gl_texture_image *	gl_unpack_texture3D (GLcontext *ctx, GLint dimensions, GLenum target, GLint level, GLint internalformat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLenum format, GLenum type, const GLvoid *pixels)
void	gl_tex_image_1D (GLcontext *ctx, GLenum target, GLint level, GLint internalformat, GLsizei width, GLint border, GLenum format, GLenum type, const GLvoid *pixels)
void	gl_tex_image_2D (GLcontext *ctx, GLenum target, GLint level, GLint internalformat, GLsizei width, GLint height, GLint border, GLenum format, GLenum type, const GLvoid *pixels)
void	gl_tex_image_3D (GLcontext *ctx, GLenum target, GLint level, GLint internalformat, GLsizei width, GLint height, GLint depth, GLint border, GLenum format, GLenum type, const GLvoid *pixels)
void	gl_TexImage1D (GLcontext *ctx, GLenum target, GLint level, GLint internalformat, GLsizei width, GLint border, GLenum format, GLenum type, struct gl_image *teximage)
void	gl_TexImage2D (GLcontext *ctx, GLenum target, GLint level, GLint internalformat, GLsizei width, GLsizei height, GLint border, GLenum format, GLenum type, struct gl_image *teximage)
void	gl_GetTexImage (GLcontext *ctx, GLenum target, GLint level, GLenum format, GLenum type, GLvoid *pixels)
void	gl_TexSubImage1D (GLcontext *ctx, GLenum target, GLint level, GLint xoffset, GLsizei width, GLenum format, GLenum type, struct gl_image *image)
void	gl_TexSubImage2D (GLcontext *ctx, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLenum type, struct gl_image *image)
void	gl_CopyTexImage1D (GLcontext *ctx, GLenum target, GLint level, GLenum internalformat, GLint x, GLint y, GLsizei width, GLint border)
void	gl_CopyTexImage2D (GLcontext *ctx, GLenum target, GLint level, GLenum internalformat, GLint x, GLint y, GLsizei width, GLsizei height, GLint border)
void	gl_CopyTexSubImage1D (GLcontext *ctx, GLenum target, GLint level, GLint xoffset, GLint x, GLint y, GLsizei width)
void	gl_CopyTexSubImage2D (GLcontext *ctx, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint x, GLint y, GLsizei width, GLsizei height)

Function Documentation

gl_alloc_texture_image()

struct gl_texture_image * gl_alloc_texture_image

(

void

)

Definition at line 331 of file teximage.c.

{
   return (struct gl_texture_image *) calloc( 1, sizeof(struct gl_texture_image) );
}

Referenced by alloc_proxy_textures(), image_to_texture(), and make_null_texture().

gl_CopyTexImage1D()

void gl_CopyTexImage1D	(	GLcontext *	ctx,
		GLenum	target,
		GLint	level,
		GLenum	internalformat,
		GLint	x,
		GLint	y,
		GLsizei	width,
		GLint	border
	)

Definition at line 1599 of file teximage.c.

{
   GLint format;
   struct gl_image *teximage;
 
   if (INSIDE_BEGIN_END(ctx)) {
      gl_error( ctx, GL_INVALID_OPERATION, "glCopyTexImage1D" );
      return;
   }
   if (target!=GL_TEXTURE_1D) {
      gl_error( ctx, GL_INVALID_ENUM, "glCopyTexImage1D(target)" );
      return;
   }
   if (level<0 || level>=MAX_TEXTURE_LEVELS) {
      gl_error( ctx, GL_INVALID_VALUE, "glCopyTexImage1D(level)" );
      return;
   }
   if (border!=0 && border!=1) {
      gl_error( ctx, GL_INVALID_VALUE, "glCopyTexImage1D(border)" );
      return;
   }
   if (width<2*border || width>2+MAX_TEXTURE_SIZE || width<0) {
      gl_error( ctx, GL_INVALID_VALUE, "glCopyTexImage1D(width)" );
      return;
   }
   format = decode_internal_format( internalformat );
   if (format<0 || (internalformat>=1 && internalformat<=4)) {
      gl_error( ctx, GL_INVALID_VALUE, "glCopyTexImage1D(format)" );
      return;
   }
 
   teximage = read_color_image( ctx, x, y, width, 1, format );
   if (!teximage) {
      gl_error( ctx, GL_OUT_OF_MEMORY, "glCopyTexImage1D" );
      return;
   }
 
   gl_TexImage1D( ctx, target, level, internalformat, width,
                  border, GL_RGBA, GL_UNSIGNED_BYTE, teximage );
 
   /* teximage was freed in gl_TexImage1D */
}

Referenced by execute_list(), and init_exec_pointers().

gl_CopyTexImage2D()

void gl_CopyTexImage2D	(	GLcontext *	ctx,
		GLenum	target,
		GLint	level,
		GLenum	internalformat,
		GLint	x,
		GLint	y,
		GLsizei	width,
		GLsizei	height,
		GLint	border
	)

Definition at line 1648 of file teximage.c.

{
   GLint format;
   struct gl_image *teximage;
 
   if (INSIDE_BEGIN_END(ctx)) {
      gl_error( ctx, GL_INVALID_OPERATION, "glCopyTexImage2D" );
      return;
   }
   if (target!=GL_TEXTURE_2D) {
      gl_error( ctx, GL_INVALID_ENUM, "glCopyTexImage2D(target)" );
      return;
   }
   if (level<0 || level>=MAX_TEXTURE_LEVELS) {
      gl_error( ctx, GL_INVALID_VALUE, "glCopyTexImage2D(level)" );
      return;
   }
   if (border!=0 && border!=1) {
      gl_error( ctx, GL_INVALID_VALUE, "glCopyTexImage2D(border)" );
      return;
   }
   if (width<2*border || width>2+MAX_TEXTURE_SIZE || width<0) {
      gl_error( ctx, GL_INVALID_VALUE, "glCopyTexImage2D(width)" );
      return;
   }
   if (height<2*border || height>2+MAX_TEXTURE_SIZE || height<0) {
      gl_error( ctx, GL_INVALID_VALUE, "glCopyTexImage2D(height)" );
      return;
   }
   format = decode_internal_format( internalformat );
   if (format<0 || (internalformat>=1 && internalformat<=4)) {
      gl_error( ctx, GL_INVALID_VALUE, "glCopyTexImage2D(format)" );
      return;
   }
 
   teximage = read_color_image( ctx, x, y, width, height, format );
   if (!teximage) {
      gl_error( ctx, GL_OUT_OF_MEMORY, "glCopyTexImage2D" );
      return;
   }
 
   gl_TexImage2D( ctx, target, level, internalformat, width, height,
                  border, GL_RGBA, GL_UNSIGNED_BYTE, teximage );
 
   /* teximage was freed in gl_TexImage2D */
}

Referenced by execute_list(), and init_exec_pointers().

gl_CopyTexSubImage1D()

void gl_CopyTexSubImage1D	(	GLcontext *	ctx,
		GLenum	target,
		GLint	level,
		GLint	xoffset,
		GLint	x,
		GLint	y,
		GLsizei	width
	)

Definition at line 1783 of file teximage.c.

{
   struct gl_texture_image *teximage;
 
   if (INSIDE_BEGIN_END(ctx)) {
      gl_error( ctx, GL_INVALID_OPERATION, "glCopyTexSubImage1D" );
      return;
   }
   if (target!=GL_TEXTURE_1D) {
      gl_error( ctx, GL_INVALID_ENUM, "glCopyTexSubImage1D(target)" );
      return;
   }
   if (level<0 || level>=MAX_TEXTURE_LEVELS) {
      gl_error( ctx, GL_INVALID_VALUE, "glCopyTexSubImage1D(level)" );
      return;
   }
   if (width<0) {
      gl_error( ctx, GL_INVALID_VALUE, "glCopyTexSubImage1D(width)" );
      return;
   }
 
   teximage = ctx->Texture.Current1D->Image[level];
 
   if (teximage) {
      if (xoffset < -((GLint)teximage->Border)) {
         gl_error( ctx, GL_INVALID_VALUE, "glCopyTexSubImage1D(xoffset)" );
         return;
      }
      /* NOTE: we're adding the border here, not subtracting! */
      if (xoffset+width > teximage->Width+teximage->Border) {
         gl_error( ctx, GL_INVALID_VALUE,
                   "glCopyTexSubImage1D(xoffset+width)" );
         return;
      }
      if (teximage->Data) {
         copy_tex_sub_image( ctx, teximage, width, 1, x, y, xoffset, 0);
      }
   }
   else {
      gl_error( ctx, GL_INVALID_OPERATION, "glCopyTexSubImage1D" );
   }
}

Referenced by execute_list(), and init_exec_pointers().

gl_CopyTexSubImage2D()

void gl_CopyTexSubImage2D	(	GLcontext *	ctx,
		GLenum	target,
		GLint	level,
		GLint	xoffset,
		GLint	yoffset,
		GLint	x,
		GLint	y,
		GLsizei	width,
		GLsizei	height
	)

Definition at line 1830 of file teximage.c.

{
   struct gl_texture_image *teximage;
 
   if (INSIDE_BEGIN_END(ctx)) {
      gl_error( ctx, GL_INVALID_OPERATION, "glCopyTexSubImage2D" );
      return;
   }
   if (target!=GL_TEXTURE_2D) {
      gl_error( ctx, GL_INVALID_ENUM, "glCopyTexSubImage2D(target)" );
      return;
   }
   if (level<0 || level>=MAX_TEXTURE_LEVELS) {
      gl_error( ctx, GL_INVALID_VALUE, "glCopyTexSubImage2D(level)" );
      return;
   }
   if (width<0) {
      gl_error( ctx, GL_INVALID_VALUE, "glCopyTexSubImage2D(width)" );
      return;
   }
   if (height<0) {
      gl_error( ctx, GL_INVALID_VALUE, "glCopyTexSubImage2D(height)" );
      return;
   }
 
   teximage = ctx->Texture.Current2D->Image[level];
 
   if (teximage) {
      if (xoffset < -((GLint)teximage->Border)) {
         gl_error( ctx, GL_INVALID_VALUE, "glCopyTexSubImage2D(xoffset)" );
         return;
      }
      if (yoffset < -((GLint)teximage->Border)) {
         gl_error( ctx, GL_INVALID_VALUE, "glCopyTexSubImage2D(yoffset)" );
         return;
      }
      /* NOTE: we're adding the border here, not subtracting! */
      if (xoffset+width > teximage->Width+teximage->Border) {
         gl_error( ctx, GL_INVALID_VALUE,
                   "glCopyTexSubImage2D(xoffset+width)" );
         return;
      }
      if (yoffset+height > teximage->Height+teximage->Border) {
         gl_error( ctx, GL_INVALID_VALUE,
                   "glCopyTexSubImage2D(yoffset+height)" );
         return;
      }
 
      if (teximage->Data) {
         copy_tex_sub_image( ctx, teximage, width, height,
                             x, y, xoffset, yoffset);
      }
   }
   else {
      gl_error( ctx, GL_INVALID_OPERATION, "glCopyTexSubImage2D" );
   }
}

Referenced by execute_list(), and init_exec_pointers().

gl_free_texture_image()

void gl_free_texture_image

(

struct gl_texture_image *

teximage

)

Definition at line 338 of file teximage.c.

{
   if (teximage->Data) {
      free( teximage->Data );
   }
   free( teximage );
}

Referenced by alloc_proxy_textures(), gl_free_texture_object(), gl_TexImage1D(), gl_TexImage2D(), gl_TexSubImage1D(), gl_TexSubImage2D(), and image_to_texture().

gl_GetTexImage()

void gl_GetTexImage	(	GLcontext *	ctx,
		GLenum	target,
		GLint	level,
		GLenum	format,
		GLenum	type,
		GLvoid *	pixels
	)

Definition at line 1213 of file teximage.c.

{
   gl_problem(ctx, "glGetTexImage not implemented");
   /* TODO */
}

Referenced by init_dlist_pointers(), and init_exec_pointers().

gl_tex_image_1D()

void gl_tex_image_1D	(	GLcontext *	ctx,
		GLenum	target,
		GLint	level,
		GLint	internalformat,
		GLsizei	width,
		GLint	border,
		GLenum	format,
		GLenum	type,
		const GLvoid *	pixels
	)

gl_tex_image_2D()

void gl_tex_image_2D	(	GLcontext *	ctx,
		GLenum	target,
		GLint	level,
		GLint	internalformat,
		GLsizei	width,
		GLint	height,
		GLint	border,
		GLenum	format,
		GLenum	type,
		const GLvoid *	pixels
	)

gl_tex_image_3D()

void gl_tex_image_3D	(	GLcontext *	ctx,
		GLenum	target,
		GLint	level,
		GLint	internalformat,
		GLsizei	width,
		GLint	height,
		GLint	depth,
		GLint	border,
		GLenum	format,
		GLenum	type,
		const GLvoid *	pixels
	)

gl_TexImage1D()

void gl_TexImage1D	(	GLcontext *	ctx,
		GLenum	target,
		GLint	level,
		GLint	internalformat,
		GLsizei	width,
		GLint	border,
		GLenum	format,
		GLenum	type,
		struct gl_image *	teximage
	)

Definition at line 1049 of file teximage.c.

{
   if (INSIDE_BEGIN_END(ctx)) {
      gl_error( ctx, GL_INVALID_OPERATION, "glTexImage1D" );
      return;
   }
 
   if (target==GL_TEXTURE_1D) {
      struct gl_texture_image *teximage;
      if (texture_1d_error_check( ctx, target, level, internalformat,
                                  format, type, width, border )) {
         /* error in texture image was detected */
         return;
      }
 
      /* free current texture image, if any */
      if (ctx->Texture.Current1D->Image[level]) {
         gl_free_texture_image( ctx->Texture.Current1D->Image[level] );
      }
 
      /* make new texture from source image */
      if (image) {
         teximage = image_to_texture(ctx, image, internalformat, border);
      }
      else {
         teximage = make_null_texture(ctx, internalformat,
                                      width, 1, 1, border);
      }
 
      /* install new texture image */
      ctx->Texture.Current1D->Image[level] = teximage;
      ctx->Texture.Current1D->Dirty = GL_TRUE;
      ctx->Texture.AnyDirty = GL_TRUE;
      ctx->NewState |= NEW_TEXTURING;
 
      /* free the source image */
      if (image && image->RefCount==0) {
         /* if RefCount>0 then image must be in a display list */
         gl_free_image(image);
      }
 
      /* tell driver about change */
      if (ctx->Driver.TexImage) {
         (*ctx->Driver.TexImage)( ctx, GL_TEXTURE_1D,
                                  ctx->Texture.Current1D,
                                  level, internalformat, teximage );
      }
   }
   else if (target==GL_PROXY_TEXTURE_1D) {
      /* Proxy texture: check for errors and update proxy state */
      if (texture_1d_error_check( ctx, target, level, internalformat,
                                  format, type, width, border )) {
         if (level>=0 && level<MAX_TEXTURE_LEVELS) {
            MEMSET( ctx->Texture.Proxy1D->Image[level], 0,
                    sizeof(struct gl_texture_image) );
         }
      }
      else {
         ctx->Texture.Proxy1D->Image[level]->Format = internalformat;
         ctx->Texture.Proxy1D->Image[level]->Border = border;
         ctx->Texture.Proxy1D->Image[level]->Width = width;
         ctx->Texture.Proxy1D->Image[level]->Height = 1;
      }
      if (image && image->RefCount==0) {
         /* if RefCount>0 then image must be in a display list */
         gl_free_image(image);
      }
   }
   else {
      gl_error( ctx, GL_INVALID_ENUM, "glTexImage1D(target)" );
      return;
   }
}

Referenced by execute_list(), gl_CopyTexImage1D(), and init_exec_pointers().

gl_TexImage2D()

void gl_TexImage2D	(	GLcontext *	ctx,
		GLenum	target,
		GLint	level,
		GLint	internalformat,
		GLsizei	width,
		GLsizei	height,
		GLint	border,
		GLenum	format,
		GLenum	type,
		struct gl_image *	teximage
	)

Definition at line 1133 of file teximage.c.

{
   if (INSIDE_BEGIN_END(ctx)) {
      gl_error( ctx, GL_INVALID_OPERATION, "glTexImage2D" );
      return;
   }
 
   if (target==GL_TEXTURE_2D) {
      struct gl_texture_image *teximage;
      if (texture_2d_error_check( ctx, target, level, internalformat,
                                  format, type, width, height, border )) {
         /* error in texture image was detected */
         return;
      }
 
      /* free current texture image, if any */
      if (ctx->Texture.Current2D->Image[level]) {
         gl_free_texture_image( ctx->Texture.Current2D->Image[level] );
      }
 
      /* make new texture from source image */
      if (image) {
         teximage = image_to_texture(ctx, image, internalformat, border);
      }
      else {
         teximage = make_null_texture(ctx, internalformat,
                                      width, height, 1, border);
      }
 
      /* install new texture image */
      ctx->Texture.Current2D->Image[level] = teximage;
      ctx->Texture.Current2D->Dirty = GL_TRUE;
      ctx->Texture.AnyDirty = GL_TRUE;
      ctx->NewState |= NEW_TEXTURING;
 
      /* free the source image */
      if (image && image->RefCount==0) {
         /* if RefCount>0 then image must be in a display list */
         gl_free_image(image);
      }
 
      /* tell driver about change */
      if (ctx->Driver.TexImage) {
         (*ctx->Driver.TexImage)( ctx, GL_TEXTURE_2D,
                                  ctx->Texture.Current2D,
                                  level, internalformat, teximage );
      }
   }
   else if (target==GL_PROXY_TEXTURE_2D) {
      /* Proxy texture: check for errors and update proxy state */
      if (texture_2d_error_check( ctx, target, level, internalformat,
                                  format, type, width, height, border )) {
         if (level>=0 && level<MAX_TEXTURE_LEVELS) {
            MEMSET( ctx->Texture.Proxy2D->Image[level], 0,
                    sizeof(struct gl_texture_image) );
         }
      }
      else {
         ctx->Texture.Proxy2D->Image[level]->Format = internalformat;
         ctx->Texture.Proxy2D->Image[level]->Border = border;
         ctx->Texture.Proxy2D->Image[level]->Width = width;
         ctx->Texture.Proxy2D->Image[level]->Height = height;
      }
      if (image && image->RefCount==0) {
         /* if RefCount>0 then image must be in a display list */
         gl_free_image(image);
      }
   }
   else {
      gl_error( ctx, GL_INVALID_ENUM, "glTexImage2D(target)" );
      return;
   }
}

Referenced by execute_list(), gl_CopyTexImage2D(), and init_exec_pointers().

gl_TexSubImage1D()

void gl_TexSubImage1D	(	GLcontext *	ctx,
		GLenum	target,
		GLint	level,
		GLint	xoffset,
		GLsizei	width,
		GLenum	format,
		GLenum	type,
		struct gl_image *	image
	)

Definition at line 1249 of file teximage.c.

{
   struct gl_texture_image *destTex;
 
   if (target!=GL_TEXTURE_1D) {
      gl_error( ctx, GL_INVALID_ENUM, "glTexSubImage1D(target)" );
      return;
   }
   if (level<0 || level>=MAX_TEXTURE_LEVELS) {
      gl_error( ctx, GL_INVALID_ENUM, "glTexSubImage1D(level)" );
      return;
   }
 
   destTex = ctx->Texture.Current1D->Image[level];
   if (!destTex) {
      gl_error( ctx, GL_INVALID_OPERATION, "glTexSubImage1D" );
      return;
   }
 
   if (xoffset < -((GLint)destTex->Border)) {
      gl_error( ctx, GL_INVALID_VALUE, "glTexSubImage1D(xoffset)" );
      return;
   }
   if (xoffset + width > destTex->Width + destTex->Border) {
      gl_error( ctx, GL_INVALID_VALUE, "glTexSubImage1D(xoffset+width)" );
      return;
   }
 
   if (image) {
      /* unpacking must have been error-free */
      GLint texcomponents = components_in_intformat(destTex->Format);
 
      if (image->Type==GL_UNSIGNED_BYTE && texcomponents==image->Components) {
         /* Simple case, just byte copy image data into texture image */
         /* row by row. */
         GLubyte *dst = destTex->Data + texcomponents * xoffset;
         GLubyte *src = (GLubyte *) image->Data;
         MEMCPY( dst, src, width * texcomponents );
      }
      else {
         /* General case, convert image pixels into texels, scale, bias, etc */
         struct gl_texture_image *subTexImg = image_to_texture(ctx, image,
                                        destTex->IntFormat, destTex->Border);
         GLubyte *dst = destTex->Data + texcomponents * xoffset;
         GLubyte *src = subTexImg->Data;
         MEMCPY( dst, src, width * texcomponents );
         gl_free_texture_image(subTexImg);
      }
 
      /* if the image's reference count is zero, delete it now */
      if (image->RefCount==0) {
         gl_free_image(image);
      }
 
      ctx->Texture.Current1D->Dirty = GL_TRUE;
      ctx->Texture.AnyDirty = GL_TRUE;
 
      /* tell driver about change */
      if (ctx->Driver.TexSubImage) {
    (*ctx->Driver.TexSubImage)( ctx, GL_TEXTURE_1D,
                    ctx->Texture.Current1D, level,
                    xoffset,0,width,1,
                    ctx->Texture.Current1D->Image[level]->IntFormat,
                    destTex );
      }
      else {
    if (ctx->Driver.TexImage) {
      (*ctx->Driver.TexImage)( ctx, GL_TEXTURE_1D,
                   ctx->Texture.Current1D,
                   level, ctx->Texture.Current1D->Image[level]->IntFormat,
                   destTex );
    }
      }
   }
   else {
      /* if no image, an error must have occured, do more testing now */
      GLint components, size;
 
      if (width<0) {
         gl_error( ctx, GL_INVALID_VALUE, "glTexSubImage1D(width)" );
         return;
      }
      if (type==GL_BITMAP && format!=GL_COLOR_INDEX) {
         gl_error( ctx, GL_INVALID_ENUM, "glTexSubImage1D(format)" );
         return;
      }
      components = components_in_intformat( format );
      if (components<0 || format==GL_STENCIL_INDEX
          || format==GL_DEPTH_COMPONENT){
         gl_error( ctx, GL_INVALID_ENUM, "glTexSubImage1D(format)" );
         return;
      }
      size = gl_sizeof_type( type );
      if (size<=0) {
         gl_error( ctx, GL_INVALID_ENUM, "glTexSubImage1D(type)" );
         return;
      }
      /* if we get here, probably ran out of memory during unpacking */
      gl_error( ctx, GL_OUT_OF_MEMORY, "glTexSubImage1D" );
   }
}

Referenced by execute_list(), and init_exec_pointers().

gl_TexSubImage2D()

void gl_TexSubImage2D	(	GLcontext *	ctx,
		GLenum	target,
		GLint	level,
		GLint	xoffset,
		GLint	yoffset,
		GLsizei	width,
		GLsizei	height,
		GLenum	format,
		GLenum	type,
		struct gl_image *	image
	)

Definition at line 1356 of file teximage.c.

{
   struct gl_texture_image *destTex;
 
   if (target!=GL_TEXTURE_2D) {
      gl_error( ctx, GL_INVALID_ENUM, "glTexSubImage2D(target)" );
      return;
   }
   if (level<0 || level>=MAX_TEXTURE_LEVELS) {
      gl_error( ctx, GL_INVALID_ENUM, "glTexSubImage2D(level)" );
      return;
   }
 
   destTex = ctx->Texture.Current2D->Image[level];
   if (!destTex) {
      gl_error( ctx, GL_INVALID_OPERATION, "glTexSubImage2D" );
      return;
   }
 
   if (xoffset < -((GLint)destTex->Border)) {
      gl_error( ctx, GL_INVALID_VALUE, "glTexSubImage2D(xoffset)" );
      return;
   }
   if (yoffset < -((GLint)destTex->Border)) {
      gl_error( ctx, GL_INVALID_VALUE, "glTexSubImage2D(yoffset)" );
      return;
   }
   if (xoffset + width > destTex->Width + destTex->Border) {
      gl_error( ctx, GL_INVALID_VALUE, "glTexSubImage2D(xoffset+width)" );
      return;
   }
   if (yoffset + height > destTex->Height + destTex->Border) {
      gl_error( ctx, GL_INVALID_VALUE, "glTexSubImage2D(yoffset+height)" );
      return;
   }
 
   if (image) {
      /* unpacking must have been error-free */
      GLint texcomponents = components_in_intformat(destTex->Format);
 
      if (image->Type==GL_UNSIGNED_BYTE && texcomponents==image->Components) {
         /* Simple case, just byte copy image data into texture image */
         /* row by row. */
         GLubyte *dst = destTex->Data 
                      + (yoffset * destTex->Width + xoffset) * texcomponents;
         GLubyte *src = (GLubyte *) image->Data;
         GLint  j;
         for (j=0;j<height;j++) {
            MEMCPY( dst, src, width * texcomponents );
            dst += destTex->Width * texcomponents * sizeof(GLubyte);
            src += width * texcomponents * sizeof(GLubyte);
         }
      }
      else {
         /* General case, convert image pixels into texels, scale, bias, etc */
         struct gl_texture_image *subTexImg = image_to_texture(ctx, image,
                                        destTex->IntFormat, destTex->Border);
         GLubyte *dst = destTex->Data
                  + (yoffset * destTex->Width + xoffset) * texcomponents;
         GLubyte *src = subTexImg->Data;
         GLint j;
         for (j=0;j<height;j++) {
            MEMCPY( dst, src, width * texcomponents );
            dst += destTex->Width * texcomponents * sizeof(GLubyte);
            src += width * texcomponents * sizeof(GLubyte);
         }
         gl_free_texture_image(subTexImg);
      }
 
      /* if the image's reference count is zero, delete it now */
      if (image->RefCount==0) {
         gl_free_image(image);
      }
 
      ctx->Texture.Current2D->Dirty = GL_TRUE;
      ctx->Texture.AnyDirty = GL_TRUE;
 
      /* tell driver about change */
      if (ctx->Driver.TexSubImage) {
    (*ctx->Driver.TexSubImage)( ctx, GL_TEXTURE_2D, ctx->Texture.Current2D, level,
                    xoffset, yoffset, width, height,
                    ctx->Texture.Current2D->Image[level]->IntFormat,
                    destTex );
      }
      else {
    if (ctx->Driver.TexImage) {
      (*ctx->Driver.TexImage)( ctx, GL_TEXTURE_2D, ctx->Texture.Current2D,
                   level, ctx->Texture.Current2D->Image[level]->IntFormat,
                   destTex );
    }
      }
   }
   else {
      /* if no image, an error must have occured, do more testing now */
      GLint components, size;
 
      if (width<0) {
         gl_error( ctx, GL_INVALID_VALUE, "glTexSubImage2D(width)" );
         return;
      }
      if (height<0) {
         gl_error( ctx, GL_INVALID_VALUE, "glTexSubImage2D(height)" );
         return;
      }
      if (type==GL_BITMAP && format!=GL_COLOR_INDEX) {
         gl_error( ctx, GL_INVALID_ENUM, "glTexSubImage1D(format)" );
         return;
      }
      components = gl_components_in_format( format );
      if (components<0 || format==GL_STENCIL_INDEX
          || format==GL_DEPTH_COMPONENT){
         gl_error( ctx, GL_INVALID_ENUM, "glTexSubImage2D(format)" );
         return;
      }
      size = gl_sizeof_type( type );
      if (size<=0) {
         gl_error( ctx, GL_INVALID_ENUM, "glTexSubImage2D(type)" );
         return;
      }
      /* if we get here, probably ran out of memory during unpacking */
      gl_error( ctx, GL_OUT_OF_MEMORY, "glTexSubImage2D" );
   }
}

Referenced by execute_list(), and init_exec_pointers().

gl_unpack_texsubimage()

struct gl_image * gl_unpack_texsubimage	(	GLcontext *	ctx,
		GLint	width,
		GLint	height,
		GLenum	format,
		GLenum	type,
		const GLvoid *	pixels
	)

Definition at line 1229 of file teximage.c.

{
   if (type==GL_BITMAP && format!=GL_COLOR_INDEX) {
      return NULL;
   }
 
   if (format==GL_STENCIL_INDEX || format==GL_DEPTH_COMPONENT){
      return NULL;
   }
 
   if (gl_sizeof_type(type)<=0) {
      return NULL;
   }
 
   return gl_unpack_image( ctx, width, height, format, type, pixels );
}

Referenced by _mesa_TexSubImage1D(), and _mesa_TexSubImage2D().

gl_unpack_texture()

struct gl_texture_image * gl_unpack_texture	(	GLcontext *	ctx,
		GLint	dimensions,
		GLenum	target,
		GLint	level,
		GLint	internalformat,
		GLsizei	width,
		GLsizei	height,
		GLint	border,
		GLenum	format,
		GLenum	type,
		const GLvoid *	pixels
	)

gl_unpack_texture3D()

struct gl_texture_image * gl_unpack_texture3D	(	GLcontext *	ctx,
		GLint	dimensions,
		GLenum	target,
		GLint	level,
		GLint	internalformat,
		GLsizei	width,
		GLsizei	height,
		GLsizei	depth,
		GLint	border,
		GLenum	format,
		GLenum	type,
		const GLvoid *	pixels
	)