X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fpixelstore.cpp;fp=source%2Fpixelstore.cpp;h=c32cf60964a30b43cf7946782fa2c5943231e710;hb=055f553b1a75f44e72f3c2b5a1c98c1e1e8f3f30;hp=0000000000000000000000000000000000000000;hpb=a533f857e7d319c6eff2b788bbad3a238468c4b2;p=libs%2Fgl.git

diff --git a/source/pixelstore.cpp b/source/pixelstore.cpp
new file mode 100644
index 00000000..c32cf609
--- /dev/null
+++ b/source/pixelstore.cpp
@@ -0,0 +1,62 @@
+#include <algorithm>
+#include "gl.h"
+#include "pixelformat.h"
+#include "pixelstore.h"
+
+using namespace std;
+
+namespace Msp {
+namespace GL {
+
+PixelStore::PixelStore():
+	row_length(0),
+	image_height(0),
+	skip_pixels(0),
+	skip_rows(0),
+	skip_images(0),
+	alignment(4)
+{ }
+
+PixelStore PixelStore::from_image(const Graphics::Image &img)
+{
+	PixelStore pstore;
+	unsigned stride = img.get_stride();
+	unsigned ncomp = get_component_count(pixelformat_from_graphics(img.get_format()));
+	pstore.set_canvas_size(img.get_stride()/ncomp, 0);
+	pstore.set_alignment(min(stride&~(stride-1), 8U));
+	return pstore;
+}
+
+void PixelStore::set_canvas_size(unsigned w, unsigned h)
+{
+	row_length = w;
+	image_height = h;
+}
+
+void PixelStore::set_origin(unsigned x, unsigned y, unsigned z)
+{
+	skip_pixels = x;
+	skip_rows = y;
+	skip_images = z;
+}
+
+void PixelStore::set_alignment(unsigned a)
+{
+	alignment = a;
+}
+
+void PixelStore::bind() const
+{
+	if(set_current(this))
+	{
+		glPixelStorei(GL_UNPACK_ROW_LENGTH, row_length);
+		glPixelStorei(GL_UNPACK_IMAGE_HEIGHT, image_height);
+		glPixelStorei(GL_UNPACK_SKIP_PIXELS, skip_pixels);
+		glPixelStorei(GL_UNPACK_SKIP_ROWS, skip_rows);
+		glPixelStorei(GL_UNPACK_SKIP_IMAGES, skip_images);
+		glPixelStorei(GL_UNPACK_ALIGNMENT, alignment);
+	}
+}
+
+} // namespace GL
+} // namespace Msp