This patch adds 'pixman_texture_conversion' function which will
be used by following patches for converting textures between
different pixel formats.
Signed-off-by: Juha-Pekka Heikkila <juhapekka.heikk...@gmail.com>
---
src/mesa/main/texstore.c | 65 ++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 65 insertions(+)
diff --git a/src/mesa/main/texstore.c b/src/mesa/main/texstore.c
index cb81f3f..a32b406 100644
--- a/src/mesa/main/texstore.c
+++ b/src/mesa/main/texstore.c
@@ -75,6 +75,10 @@
#include "../../gallium/auxiliary/util/u_format_r11g11b10f.h"
+#ifdef HAVE_PIXMAN
+# include <pixman.h>
+#endif
+
enum {
ZERO = 4,
ONE = 5
@@ -966,6 +970,67 @@ memcpy_texture(struct gl_context *ctx,
}
}
+#ifdef HAVE_PIXMAN
+/**
+ * Use Pixman library to copy and convert src image to dst image.
+ * \param srcFormat pixman_format_code_t of the source image.
+ * \param srcBits pointer to source bits.
+ * \param srcStride the length of source stride.
+ * \param width of the source and destination images.
+ * \param height of the source and destination images.
+ * \param dstFormat pixman_format_code_t of the destination image.
+ * \param dstBits pointer to destination bits.
+ * \param dstStride the length of destination stride.
+ * \return GLboolean GL_TRUE if everything ok.
+ */
+static GLboolean
+pixman_texture_conversion(
+ const pixman_format_code_t srcFormat,
+ uint32_t *srcBits, const uint32_t srcStride,
+ const uint16_t width, const uint16_t height,
+ const pixman_format_code_t dstFormat,
+ uint32_t *dstBits, const uint32_t dstStride)
+{
+ pixman_image_t *pixmanImage[2];
+
+ if ((pixmanImage[0] = pixman_image_create_bits_no_clear(srcFormat,
+ width,
+ height,
+ srcBits,
+ srcStride))
+ == NULL)
+ return GL_FALSE;
+
+ /* Assumption source and destination images are same size here.
+ */
+ if ((pixmanImage[1] = pixman_image_create_bits_no_clear(dstFormat,
+ width,
+ height,
+ dstBits,
+ dstStride))
+ == NULL) {
+ pixman_image_unref(pixmanImage[0]);
+ return GL_FALSE;
+ }
+
+ pixman_image_composite(PIXMAN_OP_SRC,
+ pixmanImage[0],
+ (pixman_image_t*) NULL,
+ pixmanImage[1],
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ width,
+ height);
+
+ pixman_image_unref(pixmanImage[0]);
+ pixman_image_unref(pixmanImage[1]);
+ return GL_TRUE;
+}
+#endif /* HAVE_PIXMAN */
/**
* General-case function for storing a color texture images with
--
1.8.1.2
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