/*
* Read R, G, B, A, RGB, L, or LA pixels.
*/
static void
read_rgba_pixels( struct gl_context *ctx,
GLint x, GLint y,
GLsizei width, GLsizei height,
GLenum format, GLenum type, GLvoid *pixels,
const struct gl_pixelstore_attrib *packing )
{
GLbitfield transferOps;
bool dst_is_integer, dst_is_luminance, needs_rebase;
int dst_stride, src_stride, rb_stride;
uint32_t dst_format, src_format;
GLubyte *dst, *map;
mesa_format rb_format;
bool needs_rgba;
void *rgba, *src;
bool src_is_uint = false;
uint8_t rebase_swizzle[4];
struct gl_framebuffer *fb = ctx->ReadBuffer;
struct gl_renderbuffer *rb = fb->_ColorReadBuffer;
if (!rb)
return;
transferOps = get_readpixels_transfer_ops(ctx, rb->Format, format, type,
GL_FALSE);
/* Describe the dst format */
dst_is_integer = _mesa_is_enum_format_integer(format);
dst_stride = _mesa_image_row_stride(packing, width, format, type);
dst_format = _mesa_format_from_format_and_type(format, type);
dst_is_luminance = format == GL_LUMINANCE ||
format == GL_LUMINANCE_ALPHA ||
format == GL_LUMINANCE_INTEGER_EXT ||
format == GL_LUMINANCE_ALPHA_INTEGER_EXT;
dst = (GLubyte *) _mesa_image_address2d(packing, pixels, width, height,
format, type, 0, 0);
/* Map the source render buffer */
ctx->Driver.MapRenderbuffer(ctx, rb, x, y, width, height, GL_MAP_READ_BIT,
&map, &rb_stride);
if (!map) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels");
return;
}
rb_format = _mesa_get_srgb_format_linear(rb->Format);
/*
* Depending on the base formats involved in the conversion we might need to
* rebase some values, so for these formats we compute a rebase swizzle.
*/
if (rb->_BaseFormat == GL_LUMINANCE || rb->_BaseFormat == GL_INTENSITY) {
needs_rebase = true;
rebase_swizzle[0] = MESA_FORMAT_SWIZZLE_X;
rebase_swizzle[1] = MESA_FORMAT_SWIZZLE_ZERO;
rebase_swizzle[2] = MESA_FORMAT_SWIZZLE_ZERO;
rebase_swizzle[3] = MESA_FORMAT_SWIZZLE_ONE;
} else if (rb->_BaseFormat == GL_LUMINANCE_ALPHA) {
needs_rebase = true;
rebase_swizzle[0] = MESA_FORMAT_SWIZZLE_X;
rebase_swizzle[1] = MESA_FORMAT_SWIZZLE_ZERO;
rebase_swizzle[2] = MESA_FORMAT_SWIZZLE_ZERO;
rebase_swizzle[3] = MESA_FORMAT_SWIZZLE_W;
} else if (_mesa_get_format_base_format(rb_format) != rb->_BaseFormat) {
needs_rebase =
_mesa_compute_rgba2base2rgba_component_mapping(rb->_BaseFormat,
rebase_swizzle);
} else {
needs_rebase = false;
}
/* Since _mesa_format_convert does not handle transferOps we need to handle
* them before we call the function. This requires to convert to RGBA float
* first so we can call _mesa_apply_rgba_transfer_ops. If the dst format is
* integer transferOps do not apply.
*
* Converting to luminance also requires converting to RGBA first, so we can
* then compute luminance values as L=R+G+B. Notice that this is different
* from GetTexImage, where we compute L=R.
*/
assert(!transferOps || (transferOps && !dst_is_integer));
needs_rgba = transferOps || dst_is_luminance;
rgba = NULL;
if (needs_rgba) {
uint32_t rgba_format;
int rgba_stride;
bool need_convert;
/* Convert to RGBA float or int/uint depending on the type of the src */
if (dst_is_integer) {
src_is_uint = _mesa_is_format_unsigned(rb_format);
if (src_is_uint) {
rgba_format = RGBA32_UINT;
rgba_stride = width * 4 * sizeof(GLuint);
} else {
rgba_format = RGBA32_INT;
rgba_stride = width * 4 * sizeof(GLint);
}
} else {
rgba_format = RGBA32_FLOAT;
rgba_stride = width * 4 * sizeof(GLfloat);
}
/* If we are lucky and the dst format matches the RGBA format we need to
* convert to, then we can convert directly into the dst buffer and avoid
* the final conversion/copy from the rgba buffer to the dst buffer.
*/
if (dst_format == rgba_format) {
need_convert = false;
rgba = dst;
} else {
need_convert = true;
rgba = malloc(height * rgba_stride);
if (!rgba) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels");
goto done_unmap;
}
}
/* Convert to RGBA now */
_mesa_format_convert(rgba, rgba_format, rgba_stride,
map, rb_format, rb_stride,
width, height,
needs_rebase ? rebase_swizzle : NULL);
/* Handle transfer ops if necessary */
if (transferOps)
_mesa_apply_rgba_transfer_ops(ctx, transferOps, width * height, rgba);
/* If we had to rebase, we have already taken care of that */
needs_rebase = false;
/* If we were lucky and our RGBA conversion matches the dst format, then
* we are done.
*/
if (!need_convert)
goto done_swap;
/* Otherwise, we need to convert from RGBA to dst next */
src = rgba;
src_format = rgba_format;
src_stride = rgba_stride;
} else {
/* No RGBA conversion needed, convert directly to dst */
src = map;
src_format = rb_format;
src_stride = rb_stride;
}
/* Do the conversion.
*
* If the dst format is Luminance, we need to do the conversion by computing
* L=R+G+B values.
*/
if (!dst_is_luminance) {
_mesa_format_convert(dst, dst_format, dst_stride,
src, src_format, src_stride,
width, height,
needs_rebase ? rebase_swizzle : NULL);
} else if (!dst_is_integer) {
/* Compute float Luminance values from RGBA float */
int luminance_stride, luminance_bytes;
void *luminance;
uint32_t luminance_format;
luminance_stride = width * sizeof(GL_FLOAT);
if (format == GL_LUMINANCE_ALPHA)
luminance_stride *= 2;
luminance_bytes = height * luminance_stride;
luminance = malloc(luminance_bytes);
if (!luminance) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels");
free(rgba);
goto done_unmap;
}
_mesa_pack_luminance_from_rgba_float(width * height, src,
luminance, format, transferOps);
/* Convert from Luminance float to dst (this will hadle type conversion
* from float to the type of dst if necessary)
*/
luminance_format = _mesa_format_from_format_and_type(format, GL_FLOAT);
_mesa_format_convert(dst, dst_format, dst_stride,
luminance, luminance_format, luminance_stride,
width, height, NULL);
} else {
_mesa_pack_luminance_from_rgba_integer(width * height, src, !src_is_uint,
dst, format, type);
}
if (rgba)
free(rgba);
done_swap:
/* Handle byte swapping if required */
if (packing->SwapBytes) {
int components = _mesa_components_in_format(format);
GLint swapSize = _mesa_sizeof_packed_type(type);
if (swapSize == 2)
_mesa_swap2((GLushort *) dst, width * height * components);
else if (swapSize == 4)
_mesa_swap4((GLuint *) dst, width * height * components);
}
done_unmap:
ctx->Driver.UnmapRenderbuffer(ctx, rb);
}
static struct gl_texture_image *
create_texture_for_pbo(struct gl_context *ctx, bool create_pbo,
GLenum pbo_target, int width, int height,
GLenum format, GLenum type, const void *pixels,
const struct gl_pixelstore_attrib *packing,
GLuint *tmp_pbo, GLuint *tmp_tex)
{
uint32_t pbo_format;
GLenum internal_format;
unsigned row_stride;
struct gl_buffer_object *buffer_obj;
struct gl_texture_object *tex_obj;
struct gl_texture_image *tex_image;
bool read_only;
if (packing->SwapBytes ||
packing->LsbFirst ||
packing->Invert)
return NULL;
pbo_format = _mesa_format_from_format_and_type(format, type);
if (_mesa_format_is_mesa_array_format(pbo_format))
pbo_format = _mesa_format_from_array_format(pbo_format);
if (!pbo_format || !ctx->TextureFormatSupported[pbo_format])
return NULL;
/* Account for SKIP_PIXELS, SKIP_ROWS, ALIGNMENT, and SKIP_IMAGES */
pixels = _mesa_image_address3d(packing, pixels,
width, height, format, type, 0, 0, 0);
row_stride = _mesa_image_row_stride(packing, width, format, type);
if (_mesa_is_bufferobj(packing->BufferObj)) {
*tmp_pbo = 0;
buffer_obj = packing->BufferObj;
} else {
bool is_pixel_pack = pbo_target == GL_PIXEL_PACK_BUFFER;
assert(create_pbo);
_mesa_GenBuffers(1, tmp_pbo);
/* We are not doing this inside meta_begin/end. However, we know the
* client doesn't have the given target bound, so we can go ahead and
* squash it. We'll set it back when we're done.
*/
_mesa_BindBuffer(pbo_target, *tmp_pbo);
/* In case of GL_PIXEL_PACK_BUFFER, pass null pointer for the pixel
* data to avoid unnecessary data copying in _mesa_BufferData().
*/
if (is_pixel_pack)
_mesa_BufferData(pbo_target, row_stride * height, NULL,
GL_STREAM_READ);
else
_mesa_BufferData(pbo_target, row_stride * height, pixels,
GL_STREAM_DRAW);
buffer_obj = packing->BufferObj;
pixels = NULL;
_mesa_BindBuffer(pbo_target, 0);
}
_mesa_GenTextures(1, tmp_tex);
tex_obj = _mesa_lookup_texture(ctx, *tmp_tex);
_mesa_initialize_texture_object(ctx, tex_obj, *tmp_tex, GL_TEXTURE_2D);
/* This must be set after _mesa_initialize_texture_object, not before. */
tex_obj->Immutable = GL_TRUE;
/* This is required for interactions with ARB_texture_view. */
tex_obj->NumLayers = 1;
internal_format = _mesa_get_format_base_format(pbo_format);
tex_image = _mesa_get_tex_image(ctx, tex_obj, tex_obj->Target, 0);
_mesa_init_teximage_fields(ctx, tex_image, width, height, 1,
0, internal_format, pbo_format);
read_only = pbo_target == GL_PIXEL_UNPACK_BUFFER;
if (!ctx->Driver.SetTextureStorageForBufferObject(ctx, tex_obj,
buffer_obj,
(intptr_t)pixels,
row_stride,
read_only)) {
_mesa_DeleteTextures(1, tmp_tex);
_mesa_DeleteBuffers(1, tmp_pbo);
return NULL;
}
return tex_image;
}
/**
* Get an uncompressed color texture image.
*/
static void
get_tex_rgba_uncompressed(struct gl_context *ctx, GLuint dimensions,
GLenum format, GLenum type, GLvoid *pixels,
struct gl_texture_image *texImage,
GLbitfield transferOps)
{
/* don't want to apply sRGB -> RGB conversion here so override the format */
const mesa_format texFormat =
_mesa_get_srgb_format_linear(texImage->TexFormat);
const GLuint width = texImage->Width;
GLuint height = texImage->Height;
GLuint depth = texImage->Depth;
GLuint img;
GLboolean dst_is_integer;
uint32_t dst_format;
int dst_stride;
uint8_t rebaseSwizzle[4];
bool needsRebase;
void *rgba = NULL;
if (texImage->TexObject->Target == GL_TEXTURE_1D_ARRAY) {
depth = height;
height = 1;
}
/* Depending on the base format involved we may need to apply a rebase
* transform (for example: if we download to a Luminance format we want
* G=0 and B=0).
*/
if (texImage->_BaseFormat == GL_LUMINANCE ||
texImage->_BaseFormat == GL_INTENSITY) {
needsRebase = true;
rebaseSwizzle[0] = MESA_FORMAT_SWIZZLE_X;
rebaseSwizzle[1] = MESA_FORMAT_SWIZZLE_ZERO;
rebaseSwizzle[2] = MESA_FORMAT_SWIZZLE_ZERO;
rebaseSwizzle[3] = MESA_FORMAT_SWIZZLE_ONE;
} else if (texImage->_BaseFormat == GL_LUMINANCE_ALPHA) {
needsRebase = true;
rebaseSwizzle[0] = MESA_FORMAT_SWIZZLE_X;
rebaseSwizzle[1] = MESA_FORMAT_SWIZZLE_ZERO;
rebaseSwizzle[2] = MESA_FORMAT_SWIZZLE_ZERO;
rebaseSwizzle[3] = MESA_FORMAT_SWIZZLE_W;
// } else if (texImage->_BaseFormat != _mesa_get_format_base_format(texFormat)) {
// needsRebase =
// _mesa_compute_rgba2base2rgba_component_mapping(texImage->_BaseFormat,
// rebaseSwizzle);
} else {
needsRebase = false;
}
/* Describe the dst format */
dst_is_integer = _mesa_is_enum_format_integer(format);
dst_format = _mesa_format_from_format_and_type(format, type);
dst_stride = _mesa_image_row_stride(&ctx->Pack, width, format, type);
/* Since _mesa_format_convert does not handle transferOps we need to handle
* them before we call the function. This requires to convert to RGBA float
* first so we can call _mesa_apply_rgba_transfer_ops. If the dst format is
* integer then transferOps do not apply.
*/
assert(!transferOps || (transferOps && !dst_is_integer));
(void) dst_is_integer; /* silence unused var warning */
for (img = 0; img < depth; img++) {
GLubyte *srcMap;
GLint rowstride;
GLubyte *img_src;
void *dest;
void *src;
int src_stride;
uint32_t src_format;
/* map src texture buffer */
ctx->Driver.MapTextureImage(ctx, texImage, img,
0, 0, width, height, GL_MAP_READ_BIT,
&srcMap, &rowstride);
if (!srcMap) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage");
goto done;
}
img_src = srcMap;
dest = _mesa_image_address(dimensions, &ctx->Pack, pixels,
width, height, format, type,
img, 0, 0);
if (transferOps) {
uint32_t rgba_format;
int rgba_stride;
bool need_convert = false;
/* We will convert to RGBA float */
// rgba_format = RGBA32_FLOAT;
rgba_stride = width * 4 * sizeof(GLfloat);
/* If we are lucky and the dst format matches the RGBA format we need
* to convert to, then we can convert directly into the dst buffer
* and avoid the final conversion/copy from the rgba buffer to the dst
* buffer.
*/
if (format == rgba_format) {
rgba = dest;
} else if (rgba == NULL) { /* Allocate the RGBA buffer only once */
need_convert = true;
rgba = malloc(height * rgba_stride);
if (!rgba) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage()");
ctx->Driver.UnmapTextureImage(ctx, texImage, img);
return;
}
}
// _mesa_format_convert(rgba, rgba_format, rgba_stride,
// img_src, texFormat, rowstride,
// width, height,
// needsRebase ? rebaseSwizzle : NULL);
/* Handle transfer ops now */
_mesa_apply_rgba_transfer_ops(ctx, transferOps, width * height, rgba);
/* If we had to rebase, we have already handled that */
needsRebase = false;
/* If we were lucky and our RGBA conversion matches the dst format, then
* we are done.
*/
if (!need_convert)
goto do_swap;
/* Otherwise, we need to convert from RGBA to dst next */
src = rgba;
src_format = rgba_format;
src_stride = rgba_stride;
} else {
/* No RGBA conversion needed, convert directly to dst */
src = img_src;
src_format = texFormat;
src_stride = rowstride;
}
/* Do the conversion to destination format */
// _mesa_format_convert(dest, dst_format, dst_stride,
// src, src_format, src_stride,
// width, height,
// needsRebase ? rebaseSwizzle : NULL);
do_swap:
/* Handle byte swapping if required */
if (ctx->Pack.SwapBytes) {
GLint swapSize = _mesa_sizeof_packed_type(type);
if (swapSize == 2 || swapSize == 4) {
int swapsPerPixel = _mesa_bytes_per_pixel(format, type) / swapSize;
assert(_mesa_bytes_per_pixel(format, type) % swapSize == 0);
if (swapSize == 2)
_mesa_swap2((GLushort *) dest, width * height * swapsPerPixel);
else if (swapSize == 4)
_mesa_swap4((GLuint *) dest, width * height * swapsPerPixel);
}
}
/* Unmap the src texture buffer */
ctx->Driver.UnmapTextureImage(ctx, texImage, img);
}
done:
if (rgba)
free(rgba);
}
/**
* Get a color texture image with decompression.
*/
static void
get_tex_rgba_compressed(struct gl_context *ctx, GLuint dimensions,
GLenum format, GLenum type, GLvoid *pixels,
struct gl_texture_image *texImage,
GLbitfield transferOps)
{
/* don't want to apply sRGB -> RGB conversion here so override the format */
const mesa_format texFormat =
_mesa_get_srgb_format_linear(texImage->TexFormat);
const GLenum baseFormat = _mesa_get_format_base_format(texFormat);
const GLuint width = texImage->Width;
const GLuint height = texImage->Height;
const GLuint depth = texImage->Depth;
GLfloat *tempImage, *tempSlice;
GLuint slice;
int srcStride, dstStride;
uint32_t dstFormat;
bool needsRebase;
uint8_t rebaseSwizzle[4];
/* Decompress into temp float buffer, then pack into user buffer */
tempImage = malloc(width * height * depth
* 4 * sizeof(GLfloat));
if (!tempImage) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage()");
return;
}
/* Decompress the texture image slices - results in 'tempImage' */
for (slice = 0; slice < depth; slice++) {
GLubyte *srcMap;
GLint srcRowStride;
tempSlice = tempImage + slice * 4 * width * height;
ctx->Driver.MapTextureImage(ctx, texImage, slice,
0, 0, width, height,
GL_MAP_READ_BIT,
&srcMap, &srcRowStride);
if (srcMap) {
_mesa_decompress_image(texFormat, width, height,
srcMap, srcRowStride, tempSlice);
ctx->Driver.UnmapTextureImage(ctx, texImage, slice);
}
else {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage");
free(tempImage);
return;
}
}
/* Depending on the base format involved we may need to apply a rebase
* transform (for example: if we download to a Luminance format we want
* G=0 and B=0).
*/
if (baseFormat == GL_LUMINANCE ||
baseFormat == GL_INTENSITY) {
needsRebase = true;
rebaseSwizzle[0] = MESA_FORMAT_SWIZZLE_X;
rebaseSwizzle[1] = MESA_FORMAT_SWIZZLE_ZERO;
rebaseSwizzle[2] = MESA_FORMAT_SWIZZLE_ZERO;
rebaseSwizzle[3] = MESA_FORMAT_SWIZZLE_ONE;
} else if (baseFormat == GL_LUMINANCE_ALPHA) {
needsRebase = true;
rebaseSwizzle[0] = MESA_FORMAT_SWIZZLE_X;
rebaseSwizzle[1] = MESA_FORMAT_SWIZZLE_ZERO;
rebaseSwizzle[2] = MESA_FORMAT_SWIZZLE_ZERO;
rebaseSwizzle[3] = MESA_FORMAT_SWIZZLE_W;
} else {
needsRebase = false;
}
srcStride = 4 * width * sizeof(GLfloat);
dstStride = _mesa_image_row_stride(&ctx->Pack, width, format, type);
dstFormat = _mesa_format_from_format_and_type(format, type);
tempSlice = tempImage;
for (slice = 0; slice < depth; slice++) {
void *dest = _mesa_image_address(dimensions, &ctx->Pack, pixels,
width, height, format, type,
slice, 0, 0);
// _mesa_format_convert(dest, dstFormat, dstStride,
// tempSlice, RGBA32_FLOAT, srcStride,
// width, height,
// needsRebase ? rebaseSwizzle : NULL);
tempSlice += 4 * width * height;
}
free(tempImage);
}
static struct gl_texture_image *
create_texture_for_pbo(struct gl_context *ctx,
bool create_pbo, GLenum pbo_target,
int dims, int width, int height, int depth,
GLenum format, GLenum type, const void *pixels,
const struct gl_pixelstore_attrib *packing,
struct gl_buffer_object **tmp_pbo, GLuint *tmp_tex)
{
uint32_t pbo_format;
GLenum internal_format;
unsigned row_stride;
struct gl_buffer_object *buffer_obj;
struct gl_texture_object *tex_obj;
struct gl_texture_image *tex_image;
bool read_only;
if (packing->SwapBytes ||
packing->LsbFirst ||
packing->Invert)
return NULL;
pbo_format = _mesa_format_from_format_and_type(format, type);
if (_mesa_format_is_mesa_array_format(pbo_format))
pbo_format = _mesa_format_from_array_format(pbo_format);
if (!pbo_format || !ctx->TextureFormatSupported[pbo_format])
return NULL;
/* Account for SKIP_PIXELS, SKIP_ROWS, ALIGNMENT, and SKIP_IMAGES */
uint32_t first_pixel = _mesa_image_offset(dims, packing, width, height,
format, type,
0, 0, 0);
uint32_t last_pixel = _mesa_image_offset(dims, packing, width, height,
format, type,
depth-1, height-1, width);
row_stride = _mesa_image_row_stride(packing, width, format, type);
if (_mesa_is_bufferobj(packing->BufferObj)) {
*tmp_pbo = NULL;
buffer_obj = packing->BufferObj;
first_pixel += (intptr_t)pixels;
} else {
bool is_pixel_pack = pbo_target == GL_PIXEL_PACK_BUFFER;
assert(create_pbo);
*tmp_pbo = ctx->Driver.NewBufferObject(ctx, 0xDEADBEEF);
if (*tmp_pbo == NULL)
return NULL;
/* In case of GL_PIXEL_PACK_BUFFER, pass null pointer for the pixel
* data to avoid unnecessary data copying in _mesa_buffer_data.
*/
if (is_pixel_pack)
_mesa_buffer_data(ctx, *tmp_pbo, GL_NONE,
last_pixel - first_pixel,
NULL,
GL_STREAM_READ,
__func__);
else
_mesa_buffer_data(ctx, *tmp_pbo, GL_NONE,
last_pixel - first_pixel,
(char *)pixels + first_pixel,
GL_STREAM_DRAW,
__func__);
buffer_obj = *tmp_pbo;
first_pixel = 0;
}
_mesa_GenTextures(1, tmp_tex);
tex_obj = _mesa_lookup_texture(ctx, *tmp_tex);
_mesa_initialize_texture_object(ctx, tex_obj, *tmp_tex, GL_TEXTURE_2D);
/* This must be set after _mesa_initialize_texture_object, not before. */
tex_obj->Immutable = GL_TRUE;
/* This is required for interactions with ARB_texture_view. */
tex_obj->NumLayers = 1;
internal_format = _mesa_get_format_base_format(pbo_format);
/* The texture is addressed as a single very-tall image, so we
* need to pack the multiple image depths together taking the
* inter-image padding into account.
*/
int image_height = packing->ImageHeight == 0 ? height : packing->ImageHeight;
int full_height = image_height * (depth - 1) + height;
tex_image = _mesa_get_tex_image(ctx, tex_obj, tex_obj->Target, 0);
_mesa_init_teximage_fields(ctx, tex_image, width, full_height, 1,
0, internal_format, pbo_format);
read_only = pbo_target == GL_PIXEL_UNPACK_BUFFER;
if (!ctx->Driver.SetTextureStorageForBufferObject(ctx, tex_obj,
buffer_obj,
first_pixel,
row_stride,
read_only)) {
_mesa_DeleteTextures(1, tmp_tex);
_mesa_reference_buffer_object(ctx, tmp_pbo, NULL);
return NULL;
}
return tex_image;
}
static GLboolean
texstore_rgba(TEXSTORE_PARAMS)
{
void *tempImage = NULL, *tempRGBA = NULL;
int srcRowStride, img;
GLubyte *src, *dst;
uint32_t srcMesaFormat;
uint8_t rebaseSwizzle[4];
bool needRebase;
bool transferOpsDone = false;
/* We have to handle MESA_FORMAT_YCBCR manually because it is a special case
* and _mesa_format_convert does not support it. In this case the we only
* allow conversions between YCBCR formats and it is mostly a memcpy.
*/
if (dstFormat == MESA_FORMAT_YCBCR || dstFormat == MESA_FORMAT_YCBCR_REV) {
return _mesa_texstore_ycbcr(ctx, dims, baseInternalFormat,
dstFormat, dstRowStride, dstSlices,
srcWidth, srcHeight, srcDepth,
srcFormat, srcType, srcAddr,
srcPacking);
}
/* We have to deal with GL_COLOR_INDEX manually because
* _mesa_format_convert does not handle this format. So what we do here is
* convert it to RGBA ubyte first and then convert from that to dst as usual.
*/
if (srcFormat == GL_COLOR_INDEX) {
/* Notice that this will already handle byte swapping if necessary */
tempImage =
_mesa_unpack_color_index_to_rgba_ubyte(ctx, dims,
srcAddr, srcFormat, srcType,
srcWidth, srcHeight, srcDepth,
srcPacking,
ctx->_ImageTransferState);
if (!tempImage)
return GL_FALSE;
/* _mesa_unpack_color_index_to_rgba_ubyte has handled transferops
* if needed.
*/
transferOpsDone = true;
/* Now we only have to adjust our src info for a conversion from
* the RGBA ubyte and then we continue as usual.
*/
srcAddr = tempImage;
srcFormat = GL_RGBA;
srcType = GL_UNSIGNED_BYTE;
} else if (srcPacking->SwapBytes) {
/* We have to handle byte-swapping scenarios before calling
* _mesa_format_convert
*/
GLint swapSize = _mesa_sizeof_packed_type(srcType);
if (swapSize == 2 || swapSize == 4) {
int bytesPerPixel = _mesa_bytes_per_pixel(srcFormat, srcType);
int swapsPerPixel = bytesPerPixel / swapSize;
int elementCount = srcWidth * srcHeight * srcDepth;
assert(bytesPerPixel % swapSize == 0);
tempImage = malloc(elementCount * bytesPerPixel);
if (!tempImage)
return GL_FALSE;
if (swapSize == 2)
_mesa_swap2_copy(tempImage, (GLushort *) srcAddr,
elementCount * swapsPerPixel);
else
_mesa_swap4_copy(tempImage, (GLuint *) srcAddr,
elementCount * swapsPerPixel);
srcAddr = tempImage;
}
}
srcRowStride =
_mesa_image_row_stride(srcPacking, srcWidth, srcFormat, srcType);
srcMesaFormat = _mesa_format_from_format_and_type(srcFormat, srcType);
dstFormat = _mesa_get_srgb_format_linear(dstFormat);
/* If we have transferOps then we need to convert to RGBA float first,
then apply transferOps, then do the conversion to dst
*/
if (!transferOpsDone &&
_mesa_texstore_needs_transfer_ops(ctx, baseInternalFormat, dstFormat)) {
/* Allocate RGBA float image */
int elementCount = srcWidth * srcHeight * srcDepth;
tempRGBA = malloc(4 * elementCount * sizeof(float));
if (!tempRGBA) {
free(tempImage);
free(tempRGBA);
return GL_FALSE;
}
/* Convert from src to RGBA float */
src = (GLubyte *) srcAddr;
dst = (GLubyte *) tempRGBA;
for (img = 0; img < srcDepth; img++) {
_mesa_format_convert(dst, RGBA32_FLOAT, 4 * srcWidth * sizeof(float),
src, srcMesaFormat, srcRowStride,
srcWidth, srcHeight, NULL);
src += srcHeight * srcRowStride;
dst += srcHeight * 4 * srcWidth * sizeof(float);
}
/* Apply transferOps */
_mesa_apply_rgba_transfer_ops(ctx, ctx->_ImageTransferState, elementCount,
(float(*)[4]) tempRGBA);
/* Now we have to adjust our src info for a conversion from
* the RGBA float image and then we continue as usual.
*/
srcAddr = tempRGBA;
srcFormat = GL_RGBA;
srcType = GL_FLOAT;
srcRowStride = srcWidth * 4 * sizeof(float);
srcMesaFormat = RGBA32_FLOAT;
}
src = (GLubyte *)
_mesa_image_address(dims, srcPacking, srcAddr, srcWidth, srcHeight,
srcFormat, srcType, 0, 0, 0);
if (_mesa_get_format_base_format(dstFormat) != baseInternalFormat) {
needRebase =
_mesa_compute_rgba2base2rgba_component_mapping(baseInternalFormat,
rebaseSwizzle);
} else {
needRebase = false;
}
for (img = 0; img < srcDepth; img++) {
_mesa_format_convert(dstSlices[img], dstFormat, dstRowStride,
src, srcMesaFormat, srcRowStride,
srcWidth, srcHeight,
needRebase ? rebaseSwizzle : NULL);
src += srcHeight * srcRowStride;
}
free(tempImage);
free(tempRGBA);
return GL_TRUE;
}
