(svn r10132) -Codechange: split out the last direct video-buffer read access to the blitter-layer

-Add: added a new renderer and blitter to make room for some optimized bpp
-Fix: fill the alpha channel in the grf-spriteloader

11 files changed, 240 insertions, 0 deletions

diff --git a/src/blitter/32bpp_simple.cpp b/src/blitter/32bpp_simple.cpp
new file mode 100644
index 000000000..15a5e926c
--- /dev/null
+++ b/src/blitter/32bpp_simple.cpp
@@ -0,0 +1,155 @@
+#include "../stdafx.h"
+#include "../zoom.hpp"
+#include "../gfx.h"
+#include "../debug.h"
+#include "../table/sprites.h"
+#include "../renderer/32bpp.hpp"
+#include "32bpp_simple.hpp"
+
+static FBlitter_32bppSimple iFBlitter_32bppSimple;
+
+/**
+ * Compose a color based on RGB values.
+ */
+static inline uint ComposeColor(uint r, uint g, uint b)
+{
+	return (r & 0xFF) << 16 | (g & 0xFF) << 8 | (b & 0xFF) << 0;
+}
+
+/**
+ * Make a pixel looks like it is transparent.
+ * @param color the color already on the screen.
+ * @param amount the amount of transparency, times 100.
+ * @return the new color for the screen.
+ */
+static inline uint MakeTransparent(uint color, uint amount)
+{
+	uint r, g, b;
+	r = GB(color, 16, 8);
+	g = GB(color, 8,  8);
+	b = GB(color, 0,  8);
+
+	return ComposeColor(r * amount / 100, g * amount / 100, b * amount / 100);
+}
+
+/**
+ * Make a color grey-based.
+ * @param color the color to make grey.
+ * @return the new color, now grey.
+ */
+static inline uint MakeGrey(uint color)
+{
+	uint r, g, b;
+	r = GB(color, 16, 8);
+	g = GB(color, 8,  8);
+	b = GB(color, 0,  8);
+
+	/* To avoid doubles and stuff, multiple it with a total of 65536 (16bits), then
+	 *  divide by it to normalize the value to a byte again. See heightmap.cpp for
+	 *  information about the formula. */
+	color = ((r * 19595) + (g * 38470) + (b * 7471)) / 65536;
+
+	return ComposeColor(color, color, color);
+}
+
+void Blitter_32bppSimple::Draw(Blitter::BlitterParams *bp, BlitterMode mode, ZoomLevel zoom)
+{
+	const SpriteLoader::CommonPixel *src, *src_line;
+	uint32 *dst, *dst_line;
+
+	/* Find where to start reading in the source sprite */
+	src_line = (const SpriteLoader::CommonPixel *)bp->sprite + (bp->skip_top * bp->sprite_width + bp->skip_left) * ScaleByZoom(1, zoom);
+	dst_line = (uint32 *)bp->dst + bp->top * bp->pitch + bp->left;
+
+	for (int y = 0; y < bp->height; y++) {
+		dst = dst_line;
+		dst_line += bp->pitch;
+
+		src = src_line;
+		src_line += bp->sprite_width * ScaleByZoom(1, zoom);
+
+		for (int x = 0; x < bp->width; x++) {
+
+			switch (mode) {
+				case BM_COLOUR_REMAP:
+					/* In case the m-channel is zero, do not remap this pixel in any way */
+					if (src->m == 0) {
+						if (src->a != 0) *dst = ComposeColor(src->r, src->g, src->b);
+					} else {
+						if (bp->remap[src->m] != 0) *dst = Renderer_32bpp::LookupColourInPalette(bp->remap[src->m]);
+					}
+					break;
+
+				case BM_TRANSPARENT:
+					/* TODO -- We make an assumption here that the remap in fact is transparency, not some color.
+					 *  This is never a problem with the code we produce, but newgrfs can make it fail... or at least:
+					 *  we produce a result the newgrf maker didn't expect ;) */
+
+					/* Make the current color a bit more black, so it looks like this image is transparent */
+					if (src->a != 0) *dst = MakeTransparent(*dst, 75);
+					break;
+
+				default:
+					if (src->a != 0) *dst = ComposeColor(src->r, src->g, src->b);
+					break;
+			}
+			dst++;
+			src += ScaleByZoom(1, zoom);
+		}
+	}
+}
+
+void Blitter_32bppSimple::DrawColorMappingRect(void *dst, int width, int height, int pal)
+{
+	uint32 *udst = (uint32 *)dst;
+
+	if (pal == PALETTE_TO_TRANSPARENT) {
+		do {
+			for (int i = 0; i != width; i++) {
+				*udst = MakeTransparent(*udst, 60);
+				udst++;
+			}
+			udst = udst - width + _screen.pitch;
+		} while (height--);
+		return;
+	}
+	if (pal == PALETTE_TO_STRUCT_GREY) {
+		do {
+			for (int i = 0; i != width; i++) {
+				*udst = MakeGrey(*udst);
+				udst++;
+			}
+			udst = udst - width + _screen.pitch;
+		} while (height--);
+		return;
+	}
+
+	DEBUG(misc, 0, "32bpp blitter doesn't know how to draw this color table ('%d')", pal);
+}
+
+Sprite *Blitter_32bppSimple::Encode(SpriteLoader::Sprite *sprite, Blitter::AllocatorProc *allocator)
+{
+	Sprite *dest_sprite;
+	SpriteLoader::CommonPixel *dst;
+	dest_sprite = (Sprite *)allocator(sizeof(*dest_sprite) + sprite->height * sprite->width * sizeof(SpriteLoader::CommonPixel));
+
+	dest_sprite->height = sprite->height;
+	dest_sprite->width  = sprite->width;
+	dest_sprite->x_offs = sprite->x_offs;
+	dest_sprite->y_offs = sprite->y_offs;
+
+	dst = (SpriteLoader::CommonPixel *)dest_sprite->data;
+
+	memcpy(dst, sprite->data, sprite->height * sprite->width * sizeof(SpriteLoader::CommonPixel));
+	for (int i = 0; i < sprite->height * sprite->width; i++) {
+		if (dst[i].m != 0) {
+			/* Pre-convert the mapping channel to a RGB value */
+			uint color = Renderer_32bpp::LookupColourInPalette(dst[i].m);
+			dst[i].r = GB(color, 16, 8);
+			dst[i].g = GB(color, 8,  8);
+			dst[i].b = GB(color, 0,  8);
+		}
+	}
+
+	return dest_sprite;
+}
diff --git a/src/blitter/32bpp_simple.hpp b/src/blitter/32bpp_simple.hpp
new file mode 100644
index 000000000..cafaaab00
--- /dev/null
+++ b/src/blitter/32bpp_simple.hpp
@@ -0,0 +1,32 @@
+/* $Id$ */
+
+/** @file 32bpp_simple.hpp */
+
+#ifndef BLITTER_32BPP_SIMPLE_HPP
+#define BLITTER_32BPP_SIMPLE_HPP
+
+#include "blitter.hpp"
+
+class Blitter_32bppSimple : public Blitter {
+public:
+	/* virtual */ uint8 GetScreenDepth() { return 32; }
+
+	/* virtual */ void Draw(Blitter::BlitterParams *bp, BlitterMode mode, ZoomLevel zoom);
+
+	/* virtual */ void DrawColorMappingRect(void *dst, int width, int height, int pal);
+
+	/* virtual */ Sprite *Encode(SpriteLoader::Sprite *sprite, Blitter::AllocatorProc *allocator);
+
+	/* virtual */ const char *GetRenderer() { return "32bpp"; }
+};
+
+class FBlitter_32bppSimple: public BlitterFactory<FBlitter_32bppSimple> {
+public:
+	/* virtual */ const char *GetName() { return "32bpp-simple"; }
+
+	/* virtual */ const char *GetDescription() { return "32bpp Simple Blitter (no palette animation)"; }
+
+	/* virtual */ Blitter *CreateInstance() { return new Blitter_32bppSimple(); }
+};
+
+#endif /* BLITTER_32BPP_SIMPLE_HPP */
diff --git a/src/blitter/8bpp_debug.cpp b/src/blitter/8bpp_debug.cpp
index 3a9b52d2a..e1ad988d3 100644
--- a/src/blitter/8bpp_debug.cpp
+++ b/src/blitter/8bpp_debug.cpp
@@ -35,6 +35,16 @@ void Blitter_8bppDebug::Draw(Blitter::BlitterParams *bp, BlitterMode mode, ZoomL
 	}
 }
 
+void Blitter_8bppDebug::DrawColorMappingRect(void *dst, int width, int height, int pal)
+{
+	const uint8 *ctab = GetNonSprite(pal) + 1;
+
+	do {
+		for (int i = 0; i != width; i++) _screen.renderer->SetPixel(dst, i, 0, ctab[((uint8 *)dst)[i]]);
+		dst = _screen.renderer->MoveTo(dst, 0, 1);
+	} while (height--);
+}
+
 Sprite *Blitter_8bppDebug::Encode(SpriteLoader::Sprite *sprite, Blitter::AllocatorProc *allocator)
 {
 	Sprite *dest_sprite;
diff --git a/src/blitter/8bpp_debug.hpp b/src/blitter/8bpp_debug.hpp
index 7b8484f70..d3b52988b 100644
--- a/src/blitter/8bpp_debug.hpp
+++ b/src/blitter/8bpp_debug.hpp
@@ -13,6 +13,8 @@ public:
 
 	/* virtual */ void Draw(Blitter::BlitterParams *bp, BlitterMode mode, ZoomLevel zoom);
 
+	/* virtual */ void DrawColorMappingRect(void *dst, int width, int height, int pal);
+
 	/* virtual */ Sprite *Encode(SpriteLoader::Sprite *sprite, Blitter::AllocatorProc *allocator);
 
 	/* virtual */ const char *GetRenderer() { return "8bpp"; }
diff --git a/src/blitter/8bpp_optimized.cpp b/src/blitter/8bpp_optimized.cpp
index 9af922e30..09c5886f0 100644
--- a/src/blitter/8bpp_optimized.cpp
+++ b/src/blitter/8bpp_optimized.cpp
@@ -102,6 +102,16 @@ void Blitter_8bppOptimized::Draw(Blitter::BlitterParams *bp, BlitterMode mode, Z
 	}
 }
 
+void Blitter_8bppOptimized::DrawColorMappingRect(void *dst, int width, int height, int pal)
+{
+	const uint8 *ctab = GetNonSprite(pal) + 1;
+
+	do {
+		for (int i = 0; i != width; i++) _screen.renderer->SetPixel(dst, i, 0, ctab[((uint8 *)dst)[i]]);
+		dst = _screen.renderer->MoveTo(dst, 0, 1);
+	} while (height--);
+}
+
 Sprite *Blitter_8bppOptimized::Encode(SpriteLoader::Sprite *sprite, Blitter::AllocatorProc *allocator)
 {
 	Sprite *dest_sprite;
diff --git a/src/blitter/8bpp_optimized.hpp b/src/blitter/8bpp_optimized.hpp
index 540e9d1c6..0c9cb2dee 100644
--- a/src/blitter/8bpp_optimized.hpp
+++ b/src/blitter/8bpp_optimized.hpp
@@ -13,6 +13,8 @@ public:
 
 	/* virtual */ void Draw(Blitter::BlitterParams *bp, BlitterMode mode, ZoomLevel zoom);
 
+	/* virtual */ void DrawColorMappingRect(void *dst, int width, int height, int pal);
+
 	/* virtual */ Sprite *Encode(SpriteLoader::Sprite *sprite, Blitter::AllocatorProc *allocator);
 
 	/* virtual */ const char *GetRenderer() { return "8bpp"; }
diff --git a/src/blitter/8bpp_simple.cpp b/src/blitter/8bpp_simple.cpp
index 010066f8a..47ebe8fc4 100644
--- a/src/blitter/8bpp_simple.cpp
+++ b/src/blitter/8bpp_simple.cpp
@@ -48,6 +48,16 @@ void Blitter_8bppSimple::Draw(Blitter::BlitterParams *bp, BlitterMode mode, Zoom
 	}
 }
 
+void Blitter_8bppSimple::DrawColorMappingRect(void *dst, int width, int height, int pal)
+{
+	const uint8 *ctab = GetNonSprite(pal) + 1;
+
+	do {
+		for (int i = 0; i != width; i++) _screen.renderer->SetPixel(dst, i, 0, ctab[((uint8 *)dst)[i]]);
+		dst = _screen.renderer->MoveTo(dst, 0, 1);
+	} while (height--);
+}
+
 Sprite *Blitter_8bppSimple::Encode(SpriteLoader::Sprite *sprite, Blitter::AllocatorProc *allocator)
 {
 	Sprite *dest_sprite;
diff --git a/src/blitter/8bpp_simple.hpp b/src/blitter/8bpp_simple.hpp
index 1188e509d..2c848d7c1 100644
--- a/src/blitter/8bpp_simple.hpp
+++ b/src/blitter/8bpp_simple.hpp
@@ -13,6 +13,8 @@ public:
 
 	/* virtual */ void Draw(Blitter::BlitterParams *bp, BlitterMode mode, ZoomLevel zoom);
 
+	/* virtual */ void DrawColorMappingRect(void *dst, int width, int height, int pal);
+
 	/* virtual */ Sprite *Encode(SpriteLoader::Sprite *sprite, Blitter::AllocatorProc *allocator);
 
 	/* virtual */ const char *GetRenderer() { return "8bpp"; }
diff --git a/src/blitter/blitter.hpp b/src/blitter/blitter.hpp
index b2e0edfe3..175533df6 100644
--- a/src/blitter/blitter.hpp
+++ b/src/blitter/blitter.hpp
@@ -49,6 +49,17 @@ public:
 	virtual void Draw(Blitter::BlitterParams *bp, BlitterMode mode, ZoomLevel zoom) = 0;
 
 	/**
+	 * Draw a colortable to the screen. This is: the color of the screen is read
+	 *  and is looked-up in the palette to match a new color, which then is put
+	 *  on the screen again.
+	 * @param dst the destination pointer (video-buffer).
+	 * @param width the width of the buffer.
+	 * @param height the height of the buffer.
+	 * @param pal the palette to use.
+	 */
+	virtual void DrawColorMappingRect(void *dst, int width, int height, int pal) = 0;
+
+	/**
 	 * Convert a sprite from the loader to our own format.
 	 */
 	virtual Sprite *Encode(SpriteLoader::Sprite *sprite, Blitter::AllocatorProc *allocator) = 0;
diff --git a/src/blitter/null.cpp b/src/blitter/null.cpp
index 1aad792a1..ae1133b20 100644
--- a/src/blitter/null.cpp
+++ b/src/blitter/null.cpp
@@ -10,6 +10,10 @@ void Blitter_Null::Draw(Blitter::BlitterParams *bp, BlitterMode mode, ZoomLevel
 {
 }
 
+void Blitter_Null::DrawColorMappingRect(void *dst, int width, int height, int pal)
+{
+}
+
 Sprite *Blitter_Null::Encode(SpriteLoader::Sprite *sprite, Blitter::AllocatorProc *allocator)
 {
 	Sprite *dest_sprite;
diff --git a/src/blitter/null.hpp b/src/blitter/null.hpp
index 5278bd474..5db182cb6 100644
--- a/src/blitter/null.hpp
+++ b/src/blitter/null.hpp
@@ -13,6 +13,8 @@ public:
 
 	/* virtual */ void Draw(Blitter::BlitterParams *bp, BlitterMode mode, ZoomLevel zoom);
 
+	/* virtual */ void DrawColorMappingRect(void *dst, int width, int height, int pal);
+
 	/* virtual */ Sprite *Encode(SpriteLoader::Sprite *sprite, Blitter::AllocatorProc *allocator);
 
 	/* virtual */ const char *GetRenderer() { return "null"; }