diff options
Diffstat (limited to 'skia/ext/platform_canvas_linux.h')
| -rw-r--r-- | skia/ext/platform_canvas_linux.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/skia/ext/platform_canvas_linux.h b/skia/ext/platform_canvas_linux.h index 1a5afe7..5782284 100644 --- a/skia/ext/platform_canvas_linux.h +++ b/skia/ext/platform_canvas_linux.h @@ -5,6 +5,8 @@ #ifndef SKIA_EXT_PLATFORM_CANVAS_LINUX_H_ #define SKIA_EXT_PLATFORM_CANVAS_LINUX_H_ +#include <unistd.h> + #include "skia/ext/platform_device_linux.h" namespace skia { @@ -21,6 +23,9 @@ class PlatformCanvasLinux : public SkCanvas { // If you use the version with no arguments, you MUST call initialize() PlatformCanvasLinux(); PlatformCanvasLinux(int width, int height, bool is_opaque); + // Construct a canvas from the given memory region. The memory is not cleared + // first. @data must be, at least, @height * StrideForWidth(@width) bytes. + PlatformCanvasLinux(int width, int height, bool is_opaque, uint8_t* data); virtual ~PlatformCanvasLinux(); // For two-part init, call if you use the no-argument constructor above @@ -31,6 +36,11 @@ class PlatformCanvasLinux : public SkCanvas { // a Linux version is added for compatibility. PlatformDeviceLinux& getTopPlatformDevice() const; + // Return the stride (length of a line in bytes) for the given width. Because + // we use 32-bits per pixel, this will be roughly 4*width. However, for + // alignment reasons we may wish to increase that. + static size_t StrideForWidth(unsigned width); + protected: // Creates a device store for use by the canvas. We override this so that // the device is always our own so we know that we can use GDI operations |