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authorBrian Paul <brian.paul@tungstengraphics.com>2000-03-20 14:37:52 +0000
committerBrian Paul <brian.paul@tungstengraphics.com>2000-03-20 14:37:52 +0000
commitf7b5707d66678f09bec652ecce024a0da6cc4a4b (patch)
tree13f27f3da0c93943ff0e9526901aca957d635b4d /src/mesa/main/teximage.c
parent8a90cabf8190eaaf37ec1eb265b71d2e163641e3 (diff)
added device driver functions for CopyTexImage, CopyTexSubImage, GetTexImage
Diffstat (limited to 'src/mesa/main/teximage.c')
-rw-r--r--src/mesa/main/teximage.c274
1 files changed, 217 insertions, 57 deletions
diff --git a/src/mesa/main/teximage.c b/src/mesa/main/teximage.c
index a38d0c5a6d..63dfd053df 100644
--- a/src/mesa/main/teximage.c
+++ b/src/mesa/main/teximage.c
@@ -1,4 +1,4 @@
-/* $Id: teximage.c,v 1.19 2000/03/19 01:10:12 brianp Exp $ */
+/* $Id: teximage.c,v 1.20 2000/03/20 14:37:54 brianp Exp $ */
/*
* Mesa 3-D graphics library
@@ -50,6 +50,21 @@
*/
+/*
+ * Default pixel packing of Mesa's internal texture images:
+ */
+static struct gl_pixelstore_attrib DefaultPacking = {
+ 1, /* Alignment */
+ 0, /* RowLength */
+ 0, /* SkipPixels */
+ 0, /* SkipRows */
+ 0, /* ImageHeight */
+ 0, /* SkipImages */
+ GL_FALSE, /* SwapBytes */
+ GL_FALSE /* LsbFirst */
+};
+
+
/*
* Compute log base 2 of n.
@@ -1034,17 +1049,19 @@ _mesa_TexImage1D( GLenum target, GLint level, GLint internalformat,
GLenum type, const GLvoid *pixels )
{
GET_CURRENT_CONTEXT(ctx);
- struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glTexImage1D");
if (target==GL_TEXTURE_1D) {
+ struct gl_texture_unit *texUnit;
struct gl_texture_image *teximage;
+
if (texture_error_check( ctx, target, level, internalformat,
format, type, 1, width, 1, 1, border )) {
- /* error in texture image was detected */
- return;
+ return; /* error in texture image was detected */
}
+ texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
+
/* free current texture image, if any */
if (texUnit->CurrentD[1]->Image[level]) {
gl_free_texture_image( texUnit->CurrentD[1]->Image[level] );
@@ -1105,17 +1122,19 @@ _mesa_TexImage2D( GLenum target, GLint level, GLint internalformat,
const GLvoid *pixels )
{
GET_CURRENT_CONTEXT(ctx);
- struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glTexImage2D");
if (target==GL_TEXTURE_2D) {
+ struct gl_texture_unit *texUnit;
struct gl_texture_image *teximage;
+
if (texture_error_check( ctx, target, level, internalformat,
format, type, 2, width, height, 1, border )) {
- /* error in texture image was detected */
- return;
+ return; /* error in texture image was detected */
}
+ texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
+
/* free current texture image, if any */
if (texUnit->CurrentD[2]->Image[level]) {
gl_free_texture_image( texUnit->CurrentD[2]->Image[level] );
@@ -1181,18 +1200,19 @@ _mesa_TexImage3D( GLenum target, GLint level, GLint internalformat,
const GLvoid *pixels )
{
GET_CURRENT_CONTEXT(ctx);
- struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glTexImage3DEXT");
+ ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glTexImage3D");
if (target==GL_TEXTURE_3D_EXT) {
+ struct gl_texture_unit *texUnit;
struct gl_texture_image *teximage;
if (texture_error_check( ctx, target, level, internalformat,
format, type, 3, width, height, depth,
border )) {
- /* error in texture image was detected */
- return;
+ return; /* error in texture image was detected */
}
+ texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
+
/* free current texture image, if any */
if (texUnit->CurrentD[3]->Image[level]) {
gl_free_texture_image( texUnit->CurrentD[3]->Image[level] );
@@ -1258,6 +1278,96 @@ _mesa_TexImage3DEXT( GLenum target, GLint level, GLenum internalformat,
}
+/*
+ * Fetch a texture image from the device driver.
+ * Store the results in the given texture object at the given mipmap level.
+ */
+static void
+get_teximage_from_driver( GLcontext *ctx, GLenum target, GLint level,
+ const struct gl_texture_object *texObj )
+{
+ GLvoid *image;
+ GLenum imgFormat, imgType;
+ GLboolean freeImage;
+ struct gl_texture_image *texImage;
+ GLint destComponents, numPixels, srcBytesPerTexel;
+
+ if (!ctx->Driver.GetTexImage)
+ return;
+
+ image = (*ctx->Driver.GetTexImage)( ctx, target, level,
+ &imgFormat, &imgType, &freeImage);
+ if (!image)
+ return;
+
+ texImage = texObj->Image[level];
+ ASSERT(texImage);
+ if (!texImage)
+ return;
+
+ destComponents = components_in_intformat(texImage->Format);
+ assert(destComponents > 0);
+ numPixels = texImage->Width * texImage->Height * texImage->Depth;
+ assert(numPixels > 0);
+ srcBytesPerTexel = gl_bytes_per_pixel(imgFormat, imgType);
+ assert(srcBytesPerTexel > 0);
+
+ if (!texImage->Data) {
+ /* Allocate memory for the texture image data */
+ texImage->Data = (GLubyte *) MALLOC(numPixels * destComponents + EXTRA_BYTE);
+ }
+
+ if (imgFormat == texImage->Format && imgType == GL_UNSIGNED_BYTE) {
+ /* We got lucky! The driver's format and type match Mesa's format. */
+ if (texImage->Data) {
+ MEMCPY(texImage->Data, image, numPixels * destComponents);
+ }
+ }
+ else {
+ /* Convert the texture image from the driver's format to Mesa's
+ * internal format.
+ */
+ const GLint width = texImage->Width;
+ const GLint height = texImage->Height;
+ const GLint depth = texImage->Depth;
+ const GLint destBytesPerRow = width * destComponents * sizeof(GLchan);
+ const GLint srcBytesPerRow = width * srcBytesPerTexel;
+ const GLenum dstType = GL_UNSIGNED_BYTE;
+ const GLenum dstFormat = texImage->Format;
+ const GLubyte *srcPtr = (const GLubyte *) image;
+ GLubyte *destPtr = texImage->Data;
+
+ if (texImage->Format == GL_COLOR_INDEX) {
+ /* color index texture */
+ GLint img, row;
+ assert(imgFormat == GL_COLOR_INDEX);
+ for (img = 0; img < depth; img++) {
+ for (row = 0; row < height; row++) {
+ _mesa_unpack_index_span(ctx, width, dstType, destPtr,
+ imgType, srcPtr, &DefaultPacking, GL_FALSE);
+ destPtr += destBytesPerRow;
+ srcPtr += srcBytesPerRow;
+ }
+ }
+ }
+ else {
+ /* color texture */
+ GLint img, row;
+ for (img = 0; img < depth; img++) {
+ for (row = 0; row < height; row++) {
+ _mesa_unpack_ubyte_color_span(ctx, width, dstFormat, destPtr,
+ imgFormat, imgType, srcPtr, &DefaultPacking, GL_FALSE);
+ destPtr += destBytesPerRow;
+ srcPtr += srcBytesPerRow;
+ }
+ }
+ }
+ }
+
+ if (freeImage)
+ FREE(image);
+}
+
void
_mesa_GetTexImage( GLenum target, GLint level, GLenum format,
@@ -1265,6 +1375,8 @@ _mesa_GetTexImage( GLenum target, GLint level, GLenum format,
{
GET_CURRENT_CONTEXT(ctx);
const struct gl_texture_object *texObj;
+ struct gl_texture_image *texImage;
+ GLboolean discardImage;
ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glGetTexImage");
@@ -1284,7 +1396,7 @@ _mesa_GetTexImage( GLenum target, GLint level, GLenum format,
}
if (!pixels)
- return; /* XXX generate an error??? */
+ return;
switch (target) {
case GL_TEXTURE_1D:
@@ -1301,8 +1413,22 @@ _mesa_GetTexImage( GLenum target, GLint level, GLenum format,
return;
}
- if (texObj->Image[level] && texObj->Image[level]->Data) {
- const struct gl_texture_image *texImage = texObj->Image[level];
+ texImage = texObj->Image[level];
+ if (!texImage) {
+ /* invalid mipmap level */
+ return;
+ }
+
+ if (!texImage->Data) {
+ /* try to get the texture image from the device driver */
+ get_teximage_from_driver(ctx, target, level, texObj);
+ discardImage = GL_TRUE;
+ }
+ else {
+ discardImage = GL_FALSE;
+ }
+
+ if (texImage->Data) {
GLint width = texImage->Width;
GLint height = texImage->Height;
GLint row;
@@ -1385,6 +1511,12 @@ _mesa_GetTexImage( GLenum target, GLint level, GLenum format,
format, type, dest, &ctx->Pack, GL_TRUE );
}
}
+
+ /* if we got the teximage from the device driver we'll discard it now */
+ if (discardImage) {
+ FREE(texImage->Data);
+ texImage->Data = NULL;
+ }
}
}
@@ -1402,8 +1534,7 @@ _mesa_TexSubImage1D( GLenum target, GLint level,
if (subtexture_error_check(ctx, 1, target, level, xoffset, 0, 0,
width, 1, 1, format, type)) {
- /* error was detected */
- return;
+ return; /* error was detected */
}
destTex = texUnit->CurrentD[1]->Image[level];
@@ -1472,8 +1603,7 @@ _mesa_TexSubImage2D( GLenum target, GLint level,
if (subtexture_error_check(ctx, 2, target, level, xoffset, yoffset, 0,
width, height, 1, format, type)) {
- /* error was detected */
- return;
+ return; /* error was detected */
}
destTex = texUnit->CurrentD[2]->Image[level];
@@ -1555,8 +1685,7 @@ _mesa_TexSubImage3D( GLenum target, GLint level,
if (subtexture_error_check(ctx, 3, target, level, xoffset, yoffset, zoffset,
width, height, depth, format, type)) {
- /* error was detected */
- return;
+ return; /* error was detected */
}
destTex = texUnit->CurrentD[3]->Image[level];
@@ -1668,15 +1797,22 @@ _mesa_CopyTexImage1D( GLenum target, GLint level,
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glCopyTexImage1D");
- if (!copytexture_error_check(ctx, 1, target, level, internalFormat,
- width, 1, border)) {
+ if (copytexture_error_check(ctx, 1, target, level, internalFormat,
+ width, 1, border))
+ return;
+
+ if (ctx->Pixel.MapColorFlag || ctx->Pixel.ScaleOrBiasRGBA
+ || !ctx->Driver.CopyTexImage1D
+ || !(*ctx->Driver.CopyTexImage1D)(ctx, target, level,
+ internalFormat, x, y, width, border))
+ {
GLubyte *image = read_color_image( ctx, x, y, width, 1 );
if (!image) {
gl_error( ctx, GL_OUT_OF_MEMORY, "glCopyTexImage1D" );
return;
}
(*ctx->Exec->TexImage1D)( target, level, internalFormat, width,
- border, GL_RGBA, GL_UNSIGNED_BYTE, image );
+ border, GL_RGBA, GL_UNSIGNED_BYTE, image );
FREE(image);
}
}
@@ -1691,15 +1827,22 @@ _mesa_CopyTexImage2D( GLenum target, GLint level, GLenum internalFormat,
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glCopyTexImage2D");
- if (!copytexture_error_check(ctx, 2, target, level, internalFormat,
- width, height, border)) {
+ if (copytexture_error_check(ctx, 2, target, level, internalFormat,
+ width, height, border))
+ return;
+
+ if (ctx->Pixel.MapColorFlag || ctx->Pixel.ScaleOrBiasRGBA
+ || !ctx->Driver.CopyTexImage2D
+ || !(*ctx->Driver.CopyTexImage2D)(ctx, target, level,
+ internalFormat, x, y, width, height, border))
+ {
GLubyte *image = read_color_image( ctx, x, y, width, height );
if (!image) {
gl_error( ctx, GL_OUT_OF_MEMORY, "glCopyTexImage2D" );
return;
}
(ctx->Exec->TexImage2D)( target, level, internalFormat, width,
- height, border, GL_RGBA, GL_UNSIGNED_BYTE, image );
+ height, border, GL_RGBA, GL_UNSIGNED_BYTE, image );
FREE(image);
}
}
@@ -1770,8 +1913,14 @@ _mesa_CopyTexSubImage1D( GLenum target, GLint level,
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glCopyTexSubImage1D");
- if (!copytexsubimage_error_check(ctx, 1, target, level,
- xoffset, 0, 0, width, 1)) {
+ if (copytexsubimage_error_check(ctx, 1, target, level,
+ xoffset, 0, 0, width, 1))
+ return;
+
+ if (ctx->Pixel.MapColorFlag || ctx->Pixel.ScaleOrBiasRGBA
+ || !ctx->Driver.CopyTexSubImage1D
+ || !(*ctx->Driver.CopyTexSubImage1D)(ctx, target, level,
+ xoffset, x, y, width)) {
struct gl_texture_unit *texUnit;
struct gl_texture_image *teximage;
texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
@@ -1779,12 +1928,12 @@ _mesa_CopyTexSubImage1D( GLenum target, GLint level,
assert(teximage);
if (teximage->Data) {
copy_tex_sub_image(ctx, teximage, width, 1, x, y, xoffset, 0, 0);
- /* tell driver about the change */
- if (ctx->Driver.TexImage) {
- (*ctx->Driver.TexImage)( ctx, GL_TEXTURE_1D,
- texUnit->CurrentD[1],
- level, teximage->IntFormat, teximage );
- }
+ /* tell driver about the change */
+ if (ctx->Driver.TexImage) {
+ (*ctx->Driver.TexImage)( ctx, GL_TEXTURE_1D,
+ texUnit->CurrentD[1],
+ level, teximage->IntFormat, teximage );
+ }
}
}
}
@@ -1799,8 +1948,14 @@ _mesa_CopyTexSubImage2D( GLenum target, GLint level,
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glCopyTexSubImage2D");
- if (!copytexsubimage_error_check(ctx, 2, target, level,
- xoffset, yoffset, 0, width, height)) {
+ if (copytexsubimage_error_check(ctx, 2, target, level,
+ xoffset, yoffset, 0, width, height))
+ return;
+
+ if (ctx->Pixel.MapColorFlag || ctx->Pixel.ScaleOrBiasRGBA
+ || !ctx->Driver.CopyTexSubImage2D
+ || !(*ctx->Driver.CopyTexSubImage2D)(ctx, target, level,
+ xoffset, yoffset, x, y, width, height )) {
struct gl_texture_unit *texUnit;
struct gl_texture_image *teximage;
texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
@@ -1809,11 +1964,11 @@ _mesa_CopyTexSubImage2D( GLenum target, GLint level,
if (teximage->Data) {
copy_tex_sub_image(ctx, teximage, width, height,
x, y, xoffset, yoffset, 0);
- /* tell driver about the change */
- if (ctx->Driver.TexImage) {
- (*ctx->Driver.TexImage)( ctx, GL_TEXTURE_2D,
- texUnit->CurrentD[2],
- level, teximage->IntFormat, teximage );
+ /* tell driver about the change */
+ if (ctx->Driver.TexImage) {
+ (*ctx->Driver.TexImage)( ctx, GL_TEXTURE_2D,
+ texUnit->CurrentD[2],
+ level, teximage->IntFormat, teximage );
}
}
}
@@ -1829,23 +1984,28 @@ _mesa_CopyTexSubImage3D( GLenum target, GLint level,
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glCopyTexSubImage3D");
- if (!copytexsubimage_error_check(ctx, 3, target, level,
- xoffset, yoffset, zoffset, width, height)) {
- struct gl_texture_unit *texUnit;
- struct gl_texture_image *teximage;
- 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,
+ if (copytexsubimage_error_check(ctx, 3, target, level,
+ xoffset, yoffset, zoffset, width, height))
+ return;
+
+ if (ctx->Pixel.MapColorFlag || ctx->Pixel.ScaleOrBiasRGBA
+ || !ctx->Driver.CopyTexSubImage3D
+ || !(*ctx->Driver.CopyTexSubImage3D)(ctx, target, level,
+ xoffset, yoffset, zoffset, x, y, width, height )) {
+ struct gl_texture_unit *texUnit;
+ struct gl_texture_image *teximage;
+ 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 */
- if (ctx->Driver.TexImage) {
- (*ctx->Driver.TexImage)( ctx, GL_TEXTURE_3D,
- texUnit->CurrentD[3],
- level, teximage->IntFormat, teximage );
- }
+ /* tell driver about the change */
+ if (ctx->Driver.TexImage) {
+ (*ctx->Driver.TexImage)( ctx, GL_TEXTURE_3D,
+ texUnit->CurrentD[3],
+ level, teximage->IntFormat, teximage );
+ }
}
}
}
-