[Spice-devel] [vdagent-win PATCH v10 2/6] Initial rewrite of image conversion code
Christophe Fergeau
cfergeau at redhat.com
Mon Jul 24 10:09:08 UTC 2017
Acked-by: Christophe Fergeau <cfergeau at redhat.com>
On Fri, Jul 21, 2017 at 02:51:37PM +0100, Frediano Ziglio wrote:
> Remove CxImage linking.
> Support Windows BMP format.
>
> Signed-off-by: Frediano Ziglio <fziglio at redhat.com>
> ---
> Makefile.am | 4 +-
> configure.ac | 4 +-
> mingw-spice-vdagent.spec.in | 10 +--
> vdagent/image.cpp | 172 +++++++++++++++++++++++++++++++++-----------
> vdagent/image.h | 21 ++++++
> 5 files changed, 158 insertions(+), 53 deletions(-)
>
> diff --git a/Makefile.am b/Makefile.am
> index 868199e..b35dd57 100644
> --- a/Makefile.am
> +++ b/Makefile.am
> @@ -23,8 +23,8 @@ LIBS = -lversion
>
> bin_PROGRAMS = vdagent vdservice
>
> -vdagent_LDADD = -lwtsapi32 $(CXIMAGE_LIBS) vdagent_rc.$(OBJEXT)
> -vdagent_CXXFLAGS = $(AM_CXXFLAGS) $(CXIMAGE_CFLAGS)
> +vdagent_LDADD = -lwtsapi32 -lgdi32 vdagent_rc.$(OBJEXT)
> +vdagent_CXXFLAGS = $(AM_CXXFLAGS)
> vdagent_LDFLAGS = $(AM_LDFLAGS) -Wl,--subsystem,windows
> vdagent_SOURCES = \
> common/vdcommon.cpp \
> diff --git a/configure.ac b/configure.ac
> index ff489cc..4eac4b4 100644
> --- a/configure.ac
> +++ b/configure.ac
> @@ -42,6 +42,7 @@ AC_DEFINE_UNQUOTED([BUILD_YEAR], "$BUILD_YEAR", [Build year])
> # Check for programs
> AC_PROG_CC
> AC_PROG_CXX
> +AX_CXX_COMPILE_STDCXX_11
> AM_PROG_CC_C_O
> AC_PROG_INSTALL
> AC_CHECK_TOOL(WINDRES, [windres])
> @@ -100,9 +101,6 @@ dnl ---------------------------------------------------------------------------
> dnl - Check library dependencies
> dnl ---------------------------------------------------------------------------
>
> -PKG_CHECK_MODULES(CXIMAGE, [cximage])
> -CXIMAGE_LIBS=`$PKG_CONFIG --static --libs cximage`
> -
> dnl ---------------------------------------------------------------------------
> dnl - Makefiles, etc.
> dnl ---------------------------------------------------------------------------
> diff --git a/mingw-spice-vdagent.spec.in b/mingw-spice-vdagent.spec.in
> index 563341d..f874e66 100644
> --- a/mingw-spice-vdagent.spec.in
> +++ b/mingw-spice-vdagent.spec.in
> @@ -13,16 +13,10 @@ Source0: vdagent-win-%{version}%{?_version_suffix}.tar.xz
>
> BuildRequires: mingw32-filesystem >= 23
> BuildRequires: mingw64-filesystem >= 23
> -BuildRequires: mingw32-cximage-static
> -BuildRequires: mingw64-cximage-static
> -BuildRequires: mingw32-jasper-static
> -BuildRequires: mingw64-jasper-static
> -BuildRequires: mingw32-libjpeg-turbo-static
> -BuildRequires: mingw64-libjpeg-turbo-static
> +BuildRequires: mingw32-gcc-c++
> +BuildRequires: mingw64-gcc-c++
> BuildRequires: mingw32-libpng-static
> BuildRequires: mingw64-libpng-static
> -BuildRequires: mingw32-libtiff-static
> -BuildRequires: mingw64-libtiff-static
> BuildRequires: mingw32-zlib-static
> BuildRequires: mingw64-zlib-static
> BuildRequires: mingw32-winpthreads-static
> diff --git a/vdagent/image.cpp b/vdagent/image.cpp
> index 960058d..faec18f 100644
> --- a/vdagent/image.cpp
> +++ b/vdagent/image.cpp
> @@ -16,39 +16,48 @@
> */
>
> #include <spice/macros.h>
> +#include <memory>
> +#include <vector>
>
> #include "vdcommon.h"
> #include "image.h"
>
> -#include "ximage.h"
> +ImageCoder *create_bitmap_coder();
> +ImageCoder *create_png_coder();
>
> -typedef struct ImageType {
> - uint32_t type;
> - DWORD cximage_format;
> -} ImageType;
> -
> -static const ImageType image_types[] = {
> - {VD_AGENT_CLIPBOARD_IMAGE_PNG, CXIMAGE_FORMAT_PNG},
> - {VD_AGENT_CLIPBOARD_IMAGE_BMP, CXIMAGE_FORMAT_BMP},
> -};
> -
> -static DWORD get_cximage_format(uint32_t type)
> +static ImageCoder *get_coder(uint32_t vdagent_type)
> {
> - for (unsigned int i = 0; i < SPICE_N_ELEMENTS(image_types); i++) {
> - if (image_types[i].type == type) {
> - return image_types[i].cximage_format;
> - }
> + switch (vdagent_type) {
> + case VD_AGENT_CLIPBOARD_IMAGE_BMP:
> + return create_bitmap_coder();
> + case VD_AGENT_CLIPBOARD_IMAGE_PNG:
> + return create_png_coder();
> }
> - return 0;
> + return NULL;
> }
>
> -HANDLE get_image_handle(const VDAgentClipboard& clipboard, uint32_t size, UINT&)
> +HANDLE get_image_handle(const VDAgentClipboard& clipboard, uint32_t size, UINT& format)
> {
> - HANDLE clip_data;
> - DWORD cximage_format = get_cximage_format(clipboard.type);
> - ASSERT(cximage_format);
> - CxImage image((BYTE*)clipboard.data, size, cximage_format);
> - clip_data = image.CopyToHandle();
> + std::unique_ptr<ImageCoder> coder(get_coder(clipboard.type));
> + if (!coder) {
> + return NULL;
> + }
> +
> + format = CF_DIB;
> + size_t dib_size = coder->get_dib_size(clipboard.data, size);
> + if (!dib_size) {
> + return NULL;
> + }
> + HANDLE clip_data = GlobalAlloc(GMEM_MOVEABLE, dib_size);
> + if (clip_data) {
> + uint8_t* dst = (uint8_t*)GlobalLock(clip_data);
> + if (!dst) {
> + GlobalFree(clip_data);
> + return NULL;
> + }
> + coder->get_dib_data(dst, clipboard.data, size);
> + GlobalUnlock(clip_data);
> + }
> return clip_data;
> }
>
> @@ -57,32 +66,115 @@ uint8_t* get_raw_clipboard_image(const VDAgentClipboardRequest& clipboard_reques
> {
> new_size = 0;
>
> - CxImage image;
> - uint8_t *new_data = NULL;
> - DWORD cximage_format = get_cximage_format(clipboard_request.type);
> - HPALETTE pal = 0;
> + if (GetObjectType(clip_data) != OBJ_BITMAP) {
> + return NULL;
> + }
> +
> + std::unique_ptr<ImageCoder> coder(get_coder(clipboard_request.type));
> + if (!coder) {
> + return NULL;
> + }
>
> - ASSERT(cximage_format);
> + HPALETTE pal = 0;
> if (IsClipboardFormatAvailable(CF_PALETTE)) {
> pal = (HPALETTE)GetClipboardData(CF_PALETTE);
> }
> - if (!image.CreateFromHBITMAP((HBITMAP)clip_data, pal)) {
> - vd_printf("Image create from handle failed");
> - return NULL;
> +
> + // extract DIB
> + BITMAP bitmap;
> + GetObject(clip_data, sizeof(bitmap), &bitmap);
> +
> + struct {
> + BITMAPINFOHEADER head;
> + RGBQUAD colors[256];
> + } info;
> +
> + BITMAPINFOHEADER& head(info.head);
> + memset(&head, 0, sizeof(head));
> + head.biSize = sizeof(head);
> + head.biWidth = bitmap.bmWidth;
> + head.biHeight = bitmap.bmHeight;
> + head.biPlanes = bitmap.bmPlanes;
> + head.biBitCount = bitmap.bmBitsPixel >= 16 ? 24 : bitmap.bmBitsPixel;
> + head.biCompression = BI_RGB;
> +
> + HDC dc = GetDC(NULL);
> + HPALETTE old_pal = NULL;
> + if (pal) {
> + old_pal = (HPALETTE)SelectObject(dc, pal);
> + RealizePalette(dc);
> + }
> + size_t stride = compute_dib_stride(head.biWidth, head.biBitCount);
> + std::vector<uint8_t> bits(stride * head.biHeight);
> + int res = GetDIBits(dc, (HBITMAP) clip_data, 0, head.biHeight,
> + &bits[0], (LPBITMAPINFO)&info, DIB_RGB_COLORS);
> + if (pal) {
> + SelectObject(dc, old_pal);
> }
> - if (!image.Encode(new_data, new_size, cximage_format)) {
> - vd_printf("Image encode to type %u failed", clipboard_request.type);
> + ReleaseDC(NULL, dc);
> + if (!res) {
> return NULL;
> }
> - vd_printf("Image encoded to %lu bytes", new_size);
> - return new_data;
> +
> + // convert DIB to desired format
> + return coder->from_bitmap(*(LPBITMAPINFO)&info, &bits[0], new_size);
> }
>
> void free_raw_clipboard_image(uint8_t *data)
> {
> - // this is really just a free however is better to make
> - // the free from CxImage code as on Windows the free
> - // can be different between libraries
> - CxImage image;
> - image.FreeMemory(data);
> + free(data);
> +}
> +
> +class BitmapCoder: public ImageCoder
> +{
> +public:
> + BitmapCoder() {};
> + size_t get_dib_size(const uint8_t *data, size_t size);
> + void get_dib_data(uint8_t *dib, const uint8_t *data, size_t size);
> + uint8_t *from_bitmap(const BITMAPINFO& info, const void *bits, long &size);
> +};
> +
> +size_t BitmapCoder::get_dib_size(const uint8_t *data, size_t size)
> +{
> + if (memcmp(data, "BM", 2) == 0)
> + return size > 14 ? size - 14 : 0;
> + return size;
> +}
> +
> +void BitmapCoder::get_dib_data(uint8_t *dib, const uint8_t *data, size_t size)
> +{
> + // just strip the file header if present, images can be either BMP or DIB
> + size_t new_size = get_dib_size(data, size);
> + memcpy(dib, data + (size - new_size), new_size);
> +}
> +
> +uint8_t *BitmapCoder::from_bitmap(const BITMAPINFO& info, const void *bits, long &size)
> +{
> + const BITMAPINFOHEADER& head(info.bmiHeader);
> +
> + const DWORD max_palette_colors = head.biBitCount <= 8 ? 1 << head.biBitCount : 0;
> + size_t palette_size = sizeof(RGBQUAD) * std::min(head.biClrUsed, max_palette_colors);
> +
> + const size_t stride = compute_dib_stride(head.biWidth, head.biBitCount);
> + const size_t image_size = stride * head.biHeight;
> + size = sizeof(head) + palette_size + image_size;
> +
> + uint8_t *data = (uint8_t *) malloc(size);
> + if (!data) {
> + return NULL;
> + }
> + memcpy(data, &info, sizeof(head) + palette_size);
> + memcpy(data + sizeof(head) + palette_size, bits, image_size);
> + return data;
> +}
> +
> +ImageCoder *create_bitmap_coder()
> +{
> + return new BitmapCoder();
> +}
> +
> +// TODO
> +ImageCoder *create_png_coder()
> +{
> + return NULL;
> }
> diff --git a/vdagent/image.h b/vdagent/image.h
> index b70f53a..da549d3 100644
> --- a/vdagent/image.h
> +++ b/vdagent/image.h
> @@ -18,6 +18,27 @@
> #ifndef VDAGENT_IMAGE_H_
> #define VDAGENT_IMAGE_H_
>
> +class ImageCoder
> +{
> +public:
> + ImageCoder() {};
> + virtual ~ImageCoder() {}
> + virtual size_t get_dib_size(const uint8_t *data, size_t size)=0;
> + virtual void get_dib_data(uint8_t *dib, const uint8_t *data, size_t size)=0;
> + virtual uint8_t *from_bitmap(const BITMAPINFO& info, const void *bits, long &size)=0;
> +private:
> + ImageCoder(const ImageCoder& rhs);
> + void operator=(const ImageCoder &rhs);
> +};
> +
> +/**
> + * Compute stride in bytes of a DIB
> + */
> +static inline size_t compute_dib_stride(unsigned int width, unsigned int bit_count)
> +{
> + return ((width * bit_count + 31u) & ~31u) / 8u;
> +}
> +
> /**
> * Returns image to put in the clipboard.
> *
> --
> 2.13.3
>
> _______________________________________________
> Spice-devel mailing list
> Spice-devel at lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/spice-devel
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