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revamped glCopyTexSubImage1/2/3D() to be more like glCopyTexImage1/2/3D()

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This commit is contained in:
Brian Paul
2000-06-15 19:57:14 +00:00
parent 4cc11a4fb3
commit 7dac13272a
1 changed files with 74 additions and 75 deletions
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149
src/mesa/main/teximage.c
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@@ -2270,6 +2270,8 @@ read_color_image( GLcontext *ctx, GLint x, GLint y,
(*ctx->Driver.SetReadBuffer)( ctx, ctx->ReadBuffer,
ctx->Pixel.DriverReadBuffer );
/* XXX TODO we have to apply pixel transfer ops here! */
dst = image;
stride = width * 4 * sizeof(GLubyte);
for (i = 0; i < height; i++) {
@@ -2305,13 +2307,22 @@ _mesa_CopyTexImage1D( GLenum target, GLint level,
|| !(*ctx->Driver.CopyTexImage1D)(ctx, target, level,
internalFormat, x, y, width, border))
{
struct gl_pixelstore_attrib unpackSave;
/* get image from framebuffer */
GLubyte *image = read_color_image( ctx, x, y, width, 1 );
if (!image) {
gl_error( ctx, GL_OUT_OF_MEMORY, "glCopyTexImage1D" );
return;
}
/* call glTexImage1D to redefine the texture */
unpackSave = ctx->Unpack;
ctx->Unpack = _mesa_native_packing;
(*ctx->Exec->TexImage1D)( target, level, internalFormat, width,
border, GL_RGBA, GL_UNSIGNED_BYTE, image );
ctx->Unpack = unpackSave;
FREE(image);
}
}
@@ -2335,65 +2346,28 @@ _mesa_CopyTexImage2D( GLenum target, GLint level, GLenum internalFormat,
|| !(*ctx->Driver.CopyTexImage2D)(ctx, target, level,
internalFormat, x, y, width, height, border))
{
struct gl_pixelstore_attrib unpackSave;
/* get image from framebuffer */
GLubyte *image = read_color_image( ctx, x, y, width, height );
if (!image) {
gl_error( ctx, GL_OUT_OF_MEMORY, "glCopyTexImage2D" );
return;
}
/* call glTexImage2D to redefine the texture */
unpackSave = ctx->Unpack;
ctx->Unpack = _mesa_native_packing;
(ctx->Exec->TexImage2D)( target, level, internalFormat, width,
height, border, GL_RGBA, GL_UNSIGNED_BYTE, image );
ctx->Unpack = unpackSave;
FREE(image);
}
}
/*
* Do the work of glCopyTexSubImage[123]D.
*/
static void
copy_tex_sub_image( GLcontext *ctx, struct gl_texture_image *dest,
GLint width, GLint height,
GLint srcx, GLint srcy,
GLint dstx, GLint dsty, GLint dstz )
{
GLint i;
GLint format, components, rectarea;
GLint texwidth, texheight, zoffset;
/* dst[xyz] may be negative if we have a texture border! */
dstx += dest->Border;
dsty += dest->Border;
dstz += dest->Border;
texwidth = dest->Width;
texheight = dest->Height;
rectarea = texwidth * texheight;
zoffset = dstz * rectarea;
format = dest->Format;
components = components_in_intformat( format );
/* Select buffer to read from */
(*ctx->Driver.SetReadBuffer)( ctx, ctx->ReadBuffer,
ctx->Pixel.DriverReadBuffer );
for (i = 0;i < height; i++) {
GLubyte rgba[MAX_WIDTH][4];
GLubyte *dst;
gl_read_rgba_span( ctx, ctx->ReadBuffer, width, srcx, srcy + i, rgba );
dst = dest->Data + ( zoffset + (dsty+i) * texwidth + dstx) * components;
_mesa_unpack_ubyte_color_span(ctx, width, format, dst,
GL_RGBA, GL_UNSIGNED_BYTE, rgba,
&_mesa_native_packing, GL_TRUE);
}
/* Read from draw buffer (the default) */
(*ctx->Driver.SetReadBuffer)( ctx, ctx->DrawBuffer,
ctx->Color.DriverDrawBuffer );
}
void
_mesa_CopyTexSubImage1D( GLenum target, GLint level,
GLint xoffset, GLint x, GLint y, GLsizei width )
@@ -2411,19 +2385,28 @@ _mesa_CopyTexSubImage1D( GLenum target, GLint level,
xoffset, x, y, width)) {
struct gl_texture_unit *texUnit;
struct gl_texture_image *teximage;
struct gl_pixelstore_attrib unpackSave;
GLubyte *image;
texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
teximage = texUnit->CurrentD[1]->Image[level];
assert(teximage);
if (teximage->Data) {
copy_tex_sub_image(ctx, teximage, width, 1, x, y, xoffset, 0, 0);
/* tell driver about the change */
/* XXX this is obsolete */
if (ctx->Driver.TexImage) {
(*ctx->Driver.TexImage)( ctx, GL_TEXTURE_1D,
texUnit->CurrentD[1],
level, teximage->IntFormat, teximage );
}
/* get image from frame buffer */
image = read_color_image(ctx, x, y, width, 1);
if (!image) {
gl_error( ctx, GL_OUT_OF_MEMORY, "glCopyTexSubImage2D" );
return;
}
/* now call glTexSubImage1D to do the real work */
unpackSave = ctx->Unpack;
ctx->Unpack = _mesa_native_packing;
_mesa_TexSubImage1D(target, level, xoffset, width,
GL_RGBA, GL_UNSIGNED_BYTE, image);
ctx->Unpack = unpackSave;
FREE(image);
}
}
@@ -2447,20 +2430,28 @@ _mesa_CopyTexSubImage2D( GLenum target, GLint level,
xoffset, yoffset, x, y, width, height )) {
struct gl_texture_unit *texUnit;
struct gl_texture_image *teximage;
struct gl_pixelstore_attrib unpackSave;
GLubyte *image;
texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
teximage = texUnit->CurrentD[2]->Image[level];
assert(teximage);
if (teximage->Data) {
copy_tex_sub_image(ctx, teximage, width, height,
x, y, xoffset, yoffset, 0);
/* tell driver about the change */
/* XXX this is obsolete */
if (ctx->Driver.TexImage) {
(*ctx->Driver.TexImage)( ctx, GL_TEXTURE_2D,
texUnit->CurrentD[2],
level, teximage->IntFormat, teximage );
}
/* get image from frame buffer */
image = read_color_image(ctx, x, y, width, height);
if (!image) {
gl_error( ctx, GL_OUT_OF_MEMORY, "glCopyTexSubImage2D" );
return;
}
/* now call glTexSubImage2D to do the real work */
unpackSave = ctx->Unpack;
ctx->Unpack = _mesa_native_packing;
_mesa_TexSubImage2D(target, level, xoffset, yoffset, width, height,
GL_RGBA, GL_UNSIGNED_BYTE, image);
ctx->Unpack = unpackSave;
FREE(image);
}
}
@@ -2484,20 +2475,28 @@ _mesa_CopyTexSubImage3D( GLenum target, GLint level,
xoffset, yoffset, zoffset, x, y, width, height )) {
struct gl_texture_unit *texUnit;
struct gl_texture_image *teximage;
struct gl_pixelstore_attrib unpackSave;
GLubyte *image;
texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
teximage = texUnit->CurrentD[3]->Image[level];
assert(teximage);
if (teximage->Data) {
copy_tex_sub_image(ctx, teximage, width, height,
x, y, xoffset, yoffset, zoffset);
/* tell driver about the change */
/* XXX this is obsolete */
if (ctx->Driver.TexImage) {
(*ctx->Driver.TexImage)( ctx, GL_TEXTURE_3D,
texUnit->CurrentD[3],
level, teximage->IntFormat, teximage );
}
/* get image from frame buffer */
image = read_color_image(ctx, x, y, width, height);
if (!image) {
gl_error( ctx, GL_OUT_OF_MEMORY, "glCopyTexSubImage2D" );
return;
}
/* now call glTexSubImage2D to do the real work */
unpackSave = ctx->Unpack;
ctx->Unpack = _mesa_native_packing;
_mesa_TexSubImage3D(target, level, xoffset, yoffset, zoffset,
width, height, 1, GL_RGBA, GL_UNSIGNED_BYTE, image);
ctx->Unpack = unpackSave;
FREE(image);
}
}