mirror of https://github.com/OpenTTD/OpenTTD.git
(svn r10206) -Codechange: more moving things to blitter-layer: ScrollBuffer
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49220cc6f1
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26e9b5ca5f
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@ -121,6 +121,58 @@ void Blitter_32bppBase::MoveBuffer(void *video_dst, const void *video_src, int w
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}
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}
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void Blitter_32bppBase::ScrollBuffer(void *video, int &left, int &top, int &width, int &height, int scroll_x, int scroll_y)
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{
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const uint32 *src;
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uint32 *dst;
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if (scroll_y > 0) {
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/*Calculate pointers */
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dst = (uint32 *)video + left + (top + height - 1) * _screen.pitch;
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src = dst - scroll_y * _screen.pitch;
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/* Decrease height and increase top */
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top += scroll_y;
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height -= scroll_y;
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assert(height > 0);
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/* Adjust left & width */
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if (scroll_x >= 0) {
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dst += scroll_x;
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left += scroll_x;
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width -= scroll_x;
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} else {
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src -= scroll_x;
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width += scroll_x;
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}
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/* Negative height as we want to copy from bottom to top */
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this->CopyFromBuffer(dst, src, width, -height, _screen.pitch);
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} else {
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/* Calculate pointers */
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dst = (uint32 *)video + left + top * _screen.pitch;
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src = dst - scroll_y * _screen.pitch;
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/* Decrese height. (scroll_y is <=0). */
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height += scroll_y;
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assert(height > 0);
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/* Adjust left & width */
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if (scroll_x >= 0) {
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dst += scroll_x;
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left += scroll_x;
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width -= scroll_x;
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} else {
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src -= scroll_x;
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width += scroll_x;
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}
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/* the y-displacement may be 0 therefore we have to use memmove,
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* because source and destination may overlap */
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this->MoveBuffer(dst, src, width, height);
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}
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}
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int Blitter_32bppBase::BufferSize(int width, int height)
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{
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return width * height * sizeof(uint32);
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@ -21,6 +21,7 @@ public:
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/* virtual */ void CopyFromBuffer(void *video, const void *src, int width, int height, int src_pitch);
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/* virtual */ void CopyToBuffer(const void *video, void *dst, int width, int height, int dst_pitch);
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/* virtual */ void MoveBuffer(void *video_dst, const void *video_src, int width, int height);
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/* virtual */ void ScrollBuffer(void *video, int &left, int &top, int &width, int &height, int scroll_x, int scroll_y);
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/* virtual */ int BufferSize(int width, int height);
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static inline uint32 LookupColourInPalette(uint8 index) {
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@ -126,6 +126,58 @@ void Blitter_8bppBase::MoveBuffer(void *video_dst, const void *video_src, int wi
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}
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}
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void Blitter_8bppBase::ScrollBuffer(void *video, int &left, int &top, int &width, int &height, int scroll_x, int scroll_y)
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{
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const uint8 *src;
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uint8 *dst;
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if (scroll_y > 0) {
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/*Calculate pointers */
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dst = (uint8 *)video + left + (top + height - 1) * _screen.pitch;
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src = dst - scroll_y * _screen.pitch;
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/* Decrease height and increase top */
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top += scroll_y;
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height -= scroll_y;
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assert(height > 0);
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/* Adjust left & width */
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if (scroll_x >= 0) {
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dst += scroll_x;
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left += scroll_x;
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width -= scroll_x;
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} else {
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src -= scroll_x;
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width += scroll_x;
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}
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/* Negative height as we want to copy from bottom to top */
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this->CopyFromBuffer(dst, src, width, -height, _screen.pitch);
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} else {
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/* Calculate pointers */
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dst = (uint8 *)video + left + top * _screen.pitch;
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src = dst - scroll_y * _screen.pitch;
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/* Decrese height. (scroll_y is <=0). */
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height += scroll_y;
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assert(height > 0);
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/* Adjust left & width */
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if (scroll_x >= 0) {
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dst += scroll_x;
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left += scroll_x;
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width -= scroll_x;
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} else {
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src -= scroll_x;
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width += scroll_x;
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}
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/* the y-displacement may be 0 therefore we have to use memmove,
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* because source and destination may overlap */
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this->MoveBuffer(dst, src, width, height);
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}
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}
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int Blitter_8bppBase::BufferSize(int width, int height)
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{
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return width * height;
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@ -21,6 +21,7 @@ public:
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/* virtual */ void CopyFromBuffer(void *video, const void *src, int width, int height, int src_pitch);
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/* virtual */ void CopyToBuffer(const void *video, void *dst, int width, int height, int dst_pitch);
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/* virtual */ void MoveBuffer(void *video_dst, const void *video_src, int width, int height);
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/* virtual */ void ScrollBuffer(void *video, int &left, int &top, int &width, int &height, int scroll_x, int scroll_y);
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/* virtual */ int BufferSize(int width, int height);
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};
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@ -138,6 +138,18 @@ public:
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*/
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virtual void MoveBuffer(void *video_dst, const void *video_src, int width, int height) = 0;
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/**
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* Scroll the videobuffer some 'x' and 'y' value.
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* @param video The buffer to scroll into.
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* @param left The left value of the screen to scroll.
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* @param top The top value of the screen to scroll.
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* @param width The width of the screen to scroll.
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* @param height The height of the screen to scroll.
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* @param scroll_x How much to scroll in X.
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* @param scroll_y How much to scroll in Y.
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*/
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virtual void ScrollBuffer(void *video, int &left, int &top, int &width, int &height, int scroll_x, int scroll_y) = 0;
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/**
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* Calculate how much memory there is needed for an image of this size in the video-buffer.
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* @param width The width of the buffer-to-be.
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@ -22,6 +22,7 @@ public:
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/* virtual */ void CopyFromBuffer(void *video, const void *src, int width, int height, int src_pitch) {};
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/* virtual */ void CopyToBuffer(const void *video, void *dst, int width, int height, int dst_pitch) {};
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/* virtual */ void MoveBuffer(void *video_dst, const void *video_src, int width, int height) {};
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/* virtual */ void ScrollBuffer(void *video, int &left, int &top, int &width, int &height, int scroll_x, int scroll_y) {};
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/* virtual */ int BufferSize(int width, int height) { return 0; };
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};
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48
src/gfx.cpp
48
src/gfx.cpp
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@ -61,59 +61,13 @@ static byte _dirty_blocks[DIRTY_BYTES_PER_LINE * MAX_SCREEN_HEIGHT / 8];
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void GfxScroll(int left, int top, int width, int height, int xo, int yo)
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{
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Blitter *blitter = BlitterFactoryBase::GetCurrentBlitter();
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const void *src;
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void *dst;
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if (xo == 0 && yo == 0) return;
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if (_cursor.visible) UndrawMouseCursor();
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UndrawTextMessage();
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if (yo > 0) {
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/*Calculate pointers */
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dst = blitter->MoveTo(_screen.dst_ptr, left, top + height - 1);
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src = blitter->MoveTo(dst, 0, -yo);
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/* Decrease height and increase top */
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top += yo;
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height -= yo;
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assert(height > 0);
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/* Adjust left & width */
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if (xo >= 0) {
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dst = blitter->MoveTo(dst, xo, 0);
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left += xo;
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width -= xo;
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} else {
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src = blitter->MoveTo(src, -xo, 0);
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width += xo;
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}
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/* Negative height as we want to copy from bottom to top */
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blitter->CopyFromBuffer(dst, src, width, -height, _screen.pitch);
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} else {
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/* Calculate pointers */
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dst = blitter->MoveTo(_screen.dst_ptr, left, top);
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src = blitter->MoveTo(dst, 0, -yo);
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/* Decrese height. (yo is <=0). */
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height += yo;
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assert(height > 0);
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/* Adjust left & width */
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if (xo >= 0) {
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dst = blitter->MoveTo(dst, xo, 0);
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left += xo;
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width -= xo;
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} else {
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src = blitter->MoveTo(src, -xo, 0);
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width += xo;
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}
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/* the y-displacement may be 0 therefore we have to use memmove,
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* because source and destination may overlap */
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blitter->MoveBuffer(dst, src, width, height);
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}
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blitter->ScrollBuffer(_screen.dst_ptr, left, top, width, height, xo, yo);
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/* This part of the screen is now dirty. */
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_video_driver->make_dirty(left, top, width, height);
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}
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