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authormarha <marha@users.sourceforge.net>2009-10-08 13:15:52 +0000
committermarha <marha@users.sourceforge.net>2009-10-08 13:15:52 +0000
commita0c4815433ccd57322f4f7703ca35e9ccfa59250 (patch)
treef5213802ec12adb86ec3136001c1c29fe5343700 /mesalib/src/mesa/main/texgetimage.c
parentc73dc01b6de45612b24dc2dd34fba24d81ebf46c (diff)
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Added MesaLib-7.6
Diffstat (limited to 'mesalib/src/mesa/main/texgetimage.c')
-rw-r--r--mesalib/src/mesa/main/texgetimage.c581
1 files changed, 581 insertions, 0 deletions
diff --git a/mesalib/src/mesa/main/texgetimage.c b/mesalib/src/mesa/main/texgetimage.c
new file mode 100644
index 000000000..14d6fc765
--- /dev/null
+++ b/mesalib/src/mesa/main/texgetimage.c
@@ -0,0 +1,581 @@
+/*
+ * Mesa 3-D graphics library
+ * Version: 7.5
+ *
+ * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
+ * Copyright (c) 2009 VMware, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+/**
+ * Code for glGetTexImage() and glGetCompressedTexImage().
+ */
+
+
+#include "glheader.h"
+#include "bufferobj.h"
+#include "context.h"
+#include "image.h"
+#include "texcompress.h"
+#include "texformat.h"
+#include "texgetimage.h"
+#include "teximage.h"
+#include "texstate.h"
+
+
+
+#if FEATURE_EXT_texture_sRGB
+
+/**
+ * Test if given texture image is an sRGB format.
+ */
+static GLboolean
+is_srgb_teximage(const struct gl_texture_image *texImage)
+{
+ switch (texImage->TexFormat->MesaFormat) {
+ case MESA_FORMAT_SRGB8:
+ case MESA_FORMAT_SRGBA8:
+ case MESA_FORMAT_SARGB8:
+ case MESA_FORMAT_SL8:
+ case MESA_FORMAT_SLA8:
+ case MESA_FORMAT_SRGB_DXT1:
+ case MESA_FORMAT_SRGBA_DXT1:
+ case MESA_FORMAT_SRGBA_DXT3:
+ case MESA_FORMAT_SRGBA_DXT5:
+ return GL_TRUE;
+ default:
+ return GL_FALSE;
+ }
+}
+
+
+/**
+ * Convert a float value from linear space to a
+ * non-linear sRGB value in [0, 255].
+ * Not terribly efficient.
+ */
+static INLINE GLfloat
+linear_to_nonlinear(GLfloat cl)
+{
+ /* can't have values outside [0, 1] */
+ GLfloat cs;
+ if (cl < 0.0031308f) {
+ cs = 12.92f * cl;
+ }
+ else {
+ cs = (GLfloat)(1.055 * _mesa_pow(cl, 0.41666) - 0.055);
+ }
+ return cs;
+}
+
+#endif /* FEATURE_EXT_texture_sRGB */
+
+
+/**
+ * Can the given type represent negative values?
+ */
+static INLINE GLboolean
+type_with_negative_values(GLenum type)
+{
+ switch (type) {
+ case GL_BYTE:
+ case GL_SHORT:
+ case GL_INT:
+ case GL_FLOAT:
+ case GL_HALF_FLOAT_ARB:
+ return GL_TRUE;
+ default:
+ return GL_FALSE;
+ }
+}
+
+
+/**
+ * This is the software fallback for Driver.GetTexImage().
+ * All error checking will have been done before this routine is called.
+ */
+void
+_mesa_get_teximage(GLcontext *ctx, GLenum target, GLint level,
+ GLenum format, GLenum type, GLvoid *pixels,
+ struct gl_texture_object *texObj,
+ struct gl_texture_image *texImage)
+{
+ const GLuint dimensions = (target == GL_TEXTURE_3D) ? 3 : 2;
+
+ if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
+ /* Packing texture image into a PBO.
+ * Map the (potentially) VRAM-based buffer into our process space so
+ * we can write into it with the code below.
+ * A hardware driver might use a sophisticated blit to move the
+ * texture data to the PBO if the PBO is in VRAM along with the texture.
+ */
+ GLubyte *buf = (GLubyte *)
+ ctx->Driver.MapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
+ GL_WRITE_ONLY_ARB, ctx->Pack.BufferObj);
+ if (!buf) {
+ /* buffer is already mapped - that's an error */
+ _mesa_error(ctx, GL_INVALID_OPERATION,"glGetTexImage(PBO is mapped)");
+ return;
+ }
+ /* <pixels> was an offset into the PBO.
+ * Now make it a real, client-side pointer inside the mapped region.
+ */
+ pixels = ADD_POINTERS(buf, pixels);
+ }
+ else if (!pixels) {
+ /* not an error */
+ return;
+ }
+
+ {
+ const GLint width = texImage->Width;
+ const GLint height = texImage->Height;
+ const GLint depth = texImage->Depth;
+ GLint img, row;
+ for (img = 0; img < depth; img++) {
+ for (row = 0; row < height; row++) {
+ /* compute destination address in client memory */
+ GLvoid *dest = _mesa_image_address( dimensions, &ctx->Pack, pixels,
+ width, height, format, type,
+ img, row, 0);
+ assert(dest);
+
+ if (format == GL_COLOR_INDEX) {
+ GLuint indexRow[MAX_WIDTH];
+ GLint col;
+ /* Can't use FetchTexel here because that returns RGBA */
+ if (texImage->TexFormat->IndexBits == 8) {
+ const GLubyte *src = (const GLubyte *) texImage->Data;
+ src += width * (img * texImage->Height + row);
+ for (col = 0; col < width; col++) {
+ indexRow[col] = src[col];
+ }
+ }
+ else if (texImage->TexFormat->IndexBits == 16) {
+ const GLushort *src = (const GLushort *) texImage->Data;
+ src += width * (img * texImage->Height + row);
+ for (col = 0; col < width; col++) {
+ indexRow[col] = src[col];
+ }
+ }
+ else {
+ _mesa_problem(ctx,
+ "Color index problem in _mesa_GetTexImage");
+ }
+ _mesa_pack_index_span(ctx, width, type, dest,
+ indexRow, &ctx->Pack,
+ 0 /* no image transfer */);
+ }
+ else if (format == GL_DEPTH_COMPONENT) {
+ GLfloat depthRow[MAX_WIDTH];
+ GLint col;
+ for (col = 0; col < width; col++) {
+ (*texImage->FetchTexelf)(texImage, col, row, img,
+ depthRow + col);
+ }
+ _mesa_pack_depth_span(ctx, width, dest, type,
+ depthRow, &ctx->Pack);
+ }
+ else if (format == GL_DEPTH_STENCIL_EXT) {
+ /* XXX Note: we're bypassing texImage->FetchTexel()! */
+ const GLuint *src = (const GLuint *) texImage->Data;
+ src += width * row + width * height * img;
+ _mesa_memcpy(dest, src, width * sizeof(GLuint));
+ if (ctx->Pack.SwapBytes) {
+ _mesa_swap4((GLuint *) dest, width);
+ }
+ }
+ else if (format == GL_YCBCR_MESA) {
+ /* No pixel transfer */
+ const GLint rowstride = texImage->RowStride;
+ MEMCPY(dest,
+ (const GLushort *) texImage->Data + row * rowstride,
+ width * sizeof(GLushort));
+ /* check for byte swapping */
+ if ((texImage->TexFormat->MesaFormat == MESA_FORMAT_YCBCR
+ && type == GL_UNSIGNED_SHORT_8_8_REV_MESA) ||
+ (texImage->TexFormat->MesaFormat == MESA_FORMAT_YCBCR_REV
+ && type == GL_UNSIGNED_SHORT_8_8_MESA)) {
+ if (!ctx->Pack.SwapBytes)
+ _mesa_swap2((GLushort *) dest, width);
+ }
+ else if (ctx->Pack.SwapBytes) {
+ _mesa_swap2((GLushort *) dest, width);
+ }
+ }
+#if FEATURE_EXT_texture_sRGB
+ else if (is_srgb_teximage(texImage)) {
+ /* special case this since need to backconvert values */
+ /* convert row to RGBA format */
+ GLfloat rgba[MAX_WIDTH][4];
+ GLint col;
+ GLbitfield transferOps = 0x0;
+
+ for (col = 0; col < width; col++) {
+ (*texImage->FetchTexelf)(texImage, col, row, img, rgba[col]);
+ if (texImage->_BaseFormat == GL_LUMINANCE) {
+ rgba[col][RCOMP] = linear_to_nonlinear(rgba[col][RCOMP]);
+ rgba[col][GCOMP] = 0.0;
+ rgba[col][BCOMP] = 0.0;
+ }
+ else if (texImage->_BaseFormat == GL_LUMINANCE_ALPHA) {
+ rgba[col][RCOMP] = linear_to_nonlinear(rgba[col][RCOMP]);
+ rgba[col][GCOMP] = 0.0;
+ rgba[col][BCOMP] = 0.0;
+ }
+ else if (texImage->_BaseFormat == GL_RGB ||
+ texImage->_BaseFormat == GL_RGBA) {
+ rgba[col][RCOMP] = linear_to_nonlinear(rgba[col][RCOMP]);
+ rgba[col][GCOMP] = linear_to_nonlinear(rgba[col][GCOMP]);
+ rgba[col][BCOMP] = linear_to_nonlinear(rgba[col][BCOMP]);
+ }
+ }
+ _mesa_pack_rgba_span_float(ctx, width, (GLfloat (*)[4]) rgba,
+ format, type, dest,
+ &ctx->Pack, transferOps);
+ }
+#endif /* FEATURE_EXT_texture_sRGB */
+ else {
+ /* general case: convert row to RGBA format */
+ GLfloat rgba[MAX_WIDTH][4];
+ GLint col;
+ GLbitfield transferOps = 0x0;
+
+ /* clamp does not apply to GetTexImage (final conversion)?
+ * Looks like we need clamp though when going from format
+ * containing negative values to unsigned format.
+ */
+ if (format == GL_LUMINANCE || format == GL_LUMINANCE_ALPHA)
+ transferOps |= IMAGE_CLAMP_BIT;
+ else if (!type_with_negative_values(type) &&
+ (texImage->TexFormat->DataType == GL_FLOAT ||
+ texImage->TexFormat->DataType == GL_SIGNED_NORMALIZED))
+ transferOps |= IMAGE_CLAMP_BIT;
+
+ for (col = 0; col < width; col++) {
+ (*texImage->FetchTexelf)(texImage, col, row, img, rgba[col]);
+ if (texImage->_BaseFormat == GL_ALPHA) {
+ rgba[col][RCOMP] = 0.0;
+ rgba[col][GCOMP] = 0.0;
+ rgba[col][BCOMP] = 0.0;
+ }
+ else if (texImage->_BaseFormat == GL_LUMINANCE) {
+ rgba[col][GCOMP] = 0.0;
+ rgba[col][BCOMP] = 0.0;
+ rgba[col][ACOMP] = 1.0;
+ }
+ else if (texImage->_BaseFormat == GL_LUMINANCE_ALPHA) {
+ rgba[col][GCOMP] = 0.0;
+ rgba[col][BCOMP] = 0.0;
+ }
+ else if (texImage->_BaseFormat == GL_INTENSITY) {
+ rgba[col][GCOMP] = 0.0;
+ rgba[col][BCOMP] = 0.0;
+ rgba[col][ACOMP] = 1.0;
+ }
+ }
+ _mesa_pack_rgba_span_float(ctx, width, (GLfloat (*)[4]) rgba,
+ format, type, dest,
+ &ctx->Pack, transferOps);
+ } /* format */
+ } /* row */
+ } /* img */
+ }
+
+ if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
+ ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
+ ctx->Pack.BufferObj);
+ }
+}
+
+
+
+/**
+ * This is the software fallback for Driver.GetCompressedTexImage().
+ * All error checking will have been done before this routine is called.
+ */
+void
+_mesa_get_compressed_teximage(GLcontext *ctx, GLenum target, GLint level,
+ GLvoid *img,
+ struct gl_texture_object *texObj,
+ struct gl_texture_image *texImage)
+{
+ GLuint size;
+
+ if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
+ /* pack texture image into a PBO */
+ GLubyte *buf;
+ if ((const GLubyte *) img + texImage->CompressedSize >
+ (const GLubyte *) ctx->Pack.BufferObj->Size) {
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "glGetCompressedTexImage(invalid PBO access)");
+ return;
+ }
+ buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
+ GL_WRITE_ONLY_ARB,
+ ctx->Pack.BufferObj);
+ if (!buf) {
+ /* buffer is already mapped - that's an error */
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "glGetCompressedTexImage(PBO is mapped)");
+ return;
+ }
+ img = ADD_POINTERS(buf, img);
+ }
+ else if (!img) {
+ /* not an error */
+ return;
+ }
+
+ /* don't use texImage->CompressedSize since that may be padded out */
+ size = _mesa_compressed_texture_size(ctx, texImage->Width, texImage->Height,
+ texImage->Depth,
+ texImage->TexFormat->MesaFormat);
+
+ /* just memcpy, no pixelstore or pixel transfer */
+ _mesa_memcpy(img, texImage->Data, size);
+
+ if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
+ ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
+ ctx->Pack.BufferObj);
+ }
+}
+
+
+
+/**
+ * Do error checking for a glGetTexImage() call.
+ * \return GL_TRUE if any error, GL_FALSE if no errors.
+ */
+static GLboolean
+getteximage_error_check(GLcontext *ctx, GLenum target, GLint level,
+ GLenum format, GLenum type, GLvoid *pixels )
+{
+ const struct gl_texture_unit *texUnit;
+ struct gl_texture_object *texObj;
+ struct gl_texture_image *texImage;
+ const GLuint maxLevels = _mesa_max_texture_levels(ctx, target);
+
+ if (maxLevels == 0) {
+ _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(target=0x%x)", target);
+ return GL_TRUE;
+ }
+
+ if (level < 0 || level >= maxLevels) {
+ _mesa_error( ctx, GL_INVALID_VALUE, "glGetTexImage(level)" );
+ return GL_TRUE;
+ }
+
+ if (_mesa_sizeof_packed_type(type) <= 0) {
+ _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexImage(type)" );
+ return GL_TRUE;
+ }
+
+ if (_mesa_components_in_format(format) <= 0 ||
+ format == GL_STENCIL_INDEX) {
+ _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexImage(format)" );
+ return GL_TRUE;
+ }
+
+ if (!ctx->Extensions.EXT_paletted_texture && _mesa_is_index_format(format)) {
+ _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(format)");
+ return GL_TRUE;
+ }
+
+ if (!ctx->Extensions.ARB_depth_texture && _mesa_is_depth_format(format)) {
+ _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(format)");
+ return GL_TRUE;
+ }
+
+ if (!ctx->Extensions.MESA_ycbcr_texture && _mesa_is_ycbcr_format(format)) {
+ _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(format)");
+ return GL_TRUE;
+ }
+
+ if (!ctx->Extensions.EXT_packed_depth_stencil
+ && _mesa_is_depthstencil_format(format)) {
+ _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(format)");
+ return GL_TRUE;
+ }
+
+ if (!ctx->Extensions.ATI_envmap_bumpmap
+ && _mesa_is_dudv_format(format)) {
+ _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(format)");
+ return GL_TRUE;
+ }
+
+ texUnit = _mesa_get_current_tex_unit(ctx);
+ texObj = _mesa_select_tex_object(ctx, texUnit, target);
+
+ if (!texObj || _mesa_is_proxy_texture(target)) {
+ _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(target)");
+ return GL_TRUE;
+ }
+
+ texImage = _mesa_select_tex_image(ctx, texObj, target, level);
+ if (!texImage) {
+ /* out of memory */
+ return GL_TRUE;
+ }
+
+ /* Make sure the requested image format is compatible with the
+ * texture's format. Note that a color index texture can be converted
+ * to RGBA so that combo is allowed.
+ */
+ if (_mesa_is_color_format(format)
+ && !_mesa_is_color_format(texImage->TexFormat->BaseFormat)
+ && !_mesa_is_index_format(texImage->TexFormat->BaseFormat)) {
+ _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexImage(format mismatch)");
+ return GL_TRUE;
+ }
+ else if (_mesa_is_index_format(format)
+ && !_mesa_is_index_format(texImage->TexFormat->BaseFormat)) {
+ _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexImage(format mismatch)");
+ return GL_TRUE;
+ }
+ else if (_mesa_is_depth_format(format)
+ && !_mesa_is_depth_format(texImage->TexFormat->BaseFormat)
+ && !_mesa_is_depthstencil_format(texImage->TexFormat->BaseFormat)) {
+ _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexImage(format mismatch)");
+ return GL_TRUE;
+ }
+ else if (_mesa_is_ycbcr_format(format)
+ && !_mesa_is_ycbcr_format(texImage->TexFormat->BaseFormat)) {
+ _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexImage(format mismatch)");
+ return GL_TRUE;
+ }
+ else if (_mesa_is_depthstencil_format(format)
+ && !_mesa_is_depthstencil_format(texImage->TexFormat->BaseFormat)) {
+ _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexImage(format mismatch)");
+ return GL_TRUE;
+ }
+ else if (_mesa_is_dudv_format(format)
+ && !_mesa_is_dudv_format(texImage->TexFormat->BaseFormat)) {
+ _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexImage(format mismatch)");
+ return GL_TRUE;
+ }
+
+ if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
+ /* packing texture image into a PBO */
+ const GLuint dimensions = (target == GL_TEXTURE_3D) ? 3 : 2;
+ if (!_mesa_validate_pbo_access(dimensions, &ctx->Pack, texImage->Width,
+ texImage->Height, texImage->Depth,
+ format, type, pixels)) {
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "glGetTexImage(invalid PBO access)");
+ return GL_TRUE;
+ }
+ }
+
+ return GL_FALSE;
+}
+
+
+
+/**
+ * Get texture image. Called by glGetTexImage.
+ *
+ * \param target texture target.
+ * \param level image level.
+ * \param format pixel data format for returned image.
+ * \param type pixel data type for returned image.
+ * \param pixels returned pixel data.
+ */
+void GLAPIENTRY
+_mesa_GetTexImage( GLenum target, GLint level, GLenum format,
+ GLenum type, GLvoid *pixels )
+{
+ const struct gl_texture_unit *texUnit;
+ struct gl_texture_object *texObj;
+ GET_CURRENT_CONTEXT(ctx);
+ ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
+
+ if (getteximage_error_check(ctx, target, level, format, type, pixels)) {
+ return;
+ }
+
+ texUnit = _mesa_get_current_tex_unit(ctx);
+ texObj = _mesa_select_tex_object(ctx, texUnit, target);
+
+ _mesa_lock_texture(ctx, texObj);
+ {
+ struct gl_texture_image *texImage =
+ _mesa_select_tex_image(ctx, texObj, target, level);
+
+ /* typically, this will call _mesa_get_teximage() */
+ ctx->Driver.GetTexImage(ctx, target, level, format, type, pixels,
+ texObj, texImage);
+ }
+ _mesa_unlock_texture(ctx, texObj);
+}
+
+
+void GLAPIENTRY
+_mesa_GetCompressedTexImageARB(GLenum target, GLint level, GLvoid *img)
+{
+ const struct gl_texture_unit *texUnit;
+ struct gl_texture_object *texObj;
+ struct gl_texture_image *texImage;
+ GLint maxLevels;
+ GET_CURRENT_CONTEXT(ctx);
+ ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
+
+ texUnit = _mesa_get_current_tex_unit(ctx);
+ texObj = _mesa_select_tex_object(ctx, texUnit, target);
+ if (!texObj) {
+ _mesa_error(ctx, GL_INVALID_ENUM, "glGetCompressedTexImageARB");
+ return;
+ }
+
+ maxLevels = _mesa_max_texture_levels(ctx, target);
+ ASSERT(maxLevels > 0); /* 0 indicates bad target, caught above */
+
+ if (level < 0 || level >= maxLevels) {
+ _mesa_error(ctx, GL_INVALID_VALUE, "glGetCompressedTexImageARB(level)");
+ return;
+ }
+
+ if (_mesa_is_proxy_texture(target)) {
+ _mesa_error(ctx, GL_INVALID_ENUM, "glGetCompressedTexImageARB(target)");
+ return;
+ }
+
+ _mesa_lock_texture(ctx, texObj);
+ {
+ texImage = _mesa_select_tex_image(ctx, texObj, target, level);
+ if (texImage) {
+ if (texImage->IsCompressed) {
+ /* this typically calls _mesa_get_compressed_teximage() */
+ ctx->Driver.GetCompressedTexImage(ctx, target, level, img,
+ texObj, texImage);
+ }
+ else {
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "glGetCompressedTexImageARB");
+ }
+ }
+ else {
+ /* probably invalid mipmap level */
+ _mesa_error(ctx, GL_INVALID_VALUE,
+ "glGetCompressedTexImageARB(level)");
+ }
+ }
+ _mesa_unlock_texture(ctx, texObj);
+}