# HG changeset patch
# User MJP
# Date 1390490230 -3600
#      Thu Jan 23 16:17:10 2014 +0100
# Node ID 976ddba7d5810dad0de6272dbaf66426698bd111
# Parent  356c943c705a8d1f9a94e076d6dc92bcdf526442
Add blitter methods to backup/restore the animation buffer

diff -r 356c943c705a -r 976ddba7d581 src/blitter/32bpp_anim.cpp
--- a/src/blitter/32bpp_anim.cpp	Sun Jan 19 09:27:44 2014 +0000
+++ b/src/blitter/32bpp_anim.cpp	Thu Jan 23 16:17:10 2014 +0100
@@ -457,3 +457,22 @@
 		this->anim_buf_height = _screen.height;
 	}
 }
+
+bool Blitter_32bppAnim::BackupAnimationBuffer()
+{
+	assert(this->anim_bkp == NULL);
+	/* C/MallocT halt on error. Not something interesting for a screenshot. */
+	uint16 *buffer = (uint16*) malloc(_screen.width * _screen.height * sizeof(uint16));
+	if (!buffer) return false;
+	this->anim_bkp = this->anim_buf;
+	this->anim_buf = buffer;
+	return true;
+}
+
+void Blitter_32bppAnim::RestoreAnimationBuffer()
+{
+	assert(this->anim_bkp != NULL);
+	free(this->anim_buf);
+	this->anim_buf = this->anim_bkp;
+	this->anim_bkp = NULL;
+}
diff -r 356c943c705a -r 976ddba7d581 src/blitter/32bpp_anim.hpp
--- a/src/blitter/32bpp_anim.hpp	Sun Jan 19 09:27:44 2014 +0000
+++ b/src/blitter/32bpp_anim.hpp	Thu Jan 23 16:17:10 2014 +0100
@@ -18,6 +18,7 @@
 class Blitter_32bppAnim : public Blitter_32bppOptimized {
 protected:
 	uint16 *anim_buf;    ///< In this buffer we keep track of the 8bpp indexes so we can do palette animation
+	uint16 *anim_bkp;    ///< Backup of anim_buf (used during giant screenshot).
 	int anim_buf_width;  ///< The width of the animation buffer.
 	int anim_buf_height; ///< The height of the animation buffer.
 	Palette palette;     ///< The current palette.
@@ -25,6 +26,7 @@
 public:
 	Blitter_32bppAnim() :
 		anim_buf(NULL),
+		anim_bkp(NULL),
 		anim_buf_width(0),
 		anim_buf_height(0)
 	{}
@@ -43,6 +45,8 @@
 	/* virtual */ const char *GetName() { return "32bpp-anim"; }
 	/* virtual */ int GetBytesPerPixel() { return 6; }
 	/* virtual */ void PostResize();
+	/* virtual */ bool BackupAnimationBuffer();
+	/* virtual */ void RestoreAnimationBuffer();
 
 	/**
 	 * Look up the colour in the current palette.
diff -r 356c943c705a -r 976ddba7d581 src/blitter/base.hpp
--- a/src/blitter/base.hpp	Sun Jan 19 09:27:44 2014 +0000
+++ b/src/blitter/base.hpp	Thu Jan 23 16:17:10 2014 +0100
@@ -186,6 +186,17 @@
 	virtual Blitter::PaletteAnimation UsePaletteAnimation() = 0;
 
 	/**
+	 * Backup the animation buffer (important for 32bpp-anim blitter before giant screenshot).
+	 * @return True on success.
+	 */
+	virtual bool BackupAnimationBuffer() { return true; };
+
+	/**
+	 * Restore the animation buffer (important for 32bpp-anim blitter after giant screenshot).
+	 */
+	virtual void RestoreAnimationBuffer() { };
+
+	/**
 	 * Get the name of the blitter, the same as the Factory-instance returns.
 	 */
 	virtual const char *GetName() = 0;