aboutsummaryrefslogtreecommitdiff
path: root/engines/sludge
diff options
context:
space:
mode:
authorSimei Yin2017-07-15 16:20:16 +0200
committerSimei Yin2017-07-15 17:51:57 +0200
commitcd384d10b2d48bce7e40674b287e77612bec7e34 (patch)
tree2d71806c9ceb9fcfc9d7c8ad29615021822ebcd2 /engines/sludge
parent3672d99d4e8b892473723e867b7ad1cfcf095363 (diff)
downloadscummvm-rg350-cd384d10b2d48bce7e40674b287e77612bec7e34.tar.gz
scummvm-rg350-cd384d10b2d48bce7e40674b287e77612bec7e34.tar.bz2
scummvm-rg350-cd384d10b2d48bce7e40674b287e77612bec7e34.zip
SLUDGE: Add credit scrolling
Diffstat (limited to 'engines/sludge')
-rw-r--r--engines/sludge/backdrop.cpp67
1 files changed, 17 insertions, 50 deletions
diff --git a/engines/sludge/backdrop.cpp b/engines/sludge/backdrop.cpp
index c23cd6aaa2..ac818893e0 100644
--- a/engines/sludge/backdrop.cpp
+++ b/engines/sludge/backdrop.cpp
@@ -62,6 +62,7 @@ bool backdropExists = false;
extern int zBufferToSet;
Graphics::Surface lightMap;
+Graphics::Surface OrigBackdropSurface;
Graphics::Surface backdropSurface;
Graphics::Surface snapshotSurface;
@@ -310,63 +311,28 @@ void blankScreen(int x1, int y1, int x2, int y2) {
#endif
}
+// This function is very useful for scrolling credits, but very little else
void hardScroll(int distance) {
- if (ABS(distance) >= (int)sceneHeight) {
- blankScreen(0, 0, sceneWidth, sceneHeight);
- return;
- }
-
+ // scroll 0 distance, return
if (!distance)
return;
-#if 0
- const GLfloat backdropTexCoords[] = {
- 0.0f, 0.0f,
- backdropTexW, 0.0f,
- 0.0f, backdropTexH,
- backdropTexW, backdropTexH
- };
-
- setPixelCoords(true);
-
- uint xoffset = 0;
- while (xoffset < sceneWidth) {
- int w = (sceneWidth - xoffset < viewportWidth) ? sceneWidth - xoffset : viewportWidth;
- uint yoffset = 0;
- while (yoffset < sceneHeight) {
- int h = (sceneHeight - yoffset < viewportHeight) ? sceneHeight - yoffset : viewportHeight;
-
- glClear(GL_COLOR_BUFFER_BIT); // Clear The Screen
-
- // Render the backdrop
- glBindTexture(GL_TEXTURE_2D, backdropTextureName);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
-
- const GLfloat vertices[] = {
- (GLfloat) - xoffset, (GLfloat) - distance - yoffset, 0.,
- (GLfloat)sceneWidth - xoffset, (GLfloat) - distance - yoffset, 0.,
- (GLfloat) - xoffset, (GLfloat)sceneHeight - distance - yoffset, 0.,
- (GLfloat)sceneWidth - xoffset, (GLfloat)sceneHeight - distance - yoffset, 0.
- };
+ // blank screen
+ blankScreen(0, 0, sceneWidth, sceneHeight);
- glUseProgram(shader.texture);
-
- setPMVMatrix(shader.texture);
-
- drawQuad(shader.texture, vertices, 1, backdropTexCoords);
-
- glUseProgram(0);
-
- // Copy Our ViewPort To The Texture
- copyTexSubImage2D(GL_TEXTURE_2D, 0, xoffset, yoffset, viewportOffsetX, viewportOffsetY, w, h, backdropTextureName);
+ // scroll more than backdrop height, screen stay blank
+ if (ABS(distance) >= (int)sceneHeight) {
+ return;
+ }
- yoffset += viewportHeight;
- }
- xoffset += viewportWidth;
+ // copy part of the backdrop to it
+ if (distance > 0) {
+ backdropSurface.copyRectToSurface(OrigBackdropSurface, 0, 0,
+ Common::Rect(0, distance, backdropSurface.w, backdropSurface.h));
+ } else {
+ backdropSurface.copyRectToSurface(OrigBackdropSurface, 0, -distance,
+ Common::Rect(0, 0, backdropSurface.w, backdropSurface.h + distance));
}
- setPixelCoords(false);
-#endif
}
void drawVerticalLine(uint x, uint y1, uint y2) {
@@ -741,6 +707,7 @@ bool loadHSI(Common::SeekableReadStream *stream, int x, int y, bool reserve) {
deleteTextures(1, &tmpTex);
#endif
+ OrigBackdropSurface.copyFrom(backdropSurface);
backdropExists = true;
return true;