[repo.or.cz] gfxprim.git branch master updated: a52536952b40f8337b4415fe265217c5976f2f77 - Gfxprim

3 Jan 2012

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http://repo.or.cz/w/gfxprim.git/commit/a52536952b40f8337b4415fe265217c5976f2...
commit a52536952b40f8337b4415fe265217c5976f2f77
Author: Cyril Hrubis metan@ucw.cz
Date:   Tue Jan 3 21:09:12 2012 +0100
gfx: Fix Anti Aliased Rectangle rotations
Silly me I should use _Raw variants.

diff --git a/include/core/GP_GetPutPixel.h b/include/core/GP_GetPutPixel.h
index 0cd7661..671a16e 100644
--- a/include/core/GP_GetPutPixel.h
+++ b/include/core/GP_GetPutPixel.h
@@ -17,7 +17,7 @@
  * Boston, MA  02110-1301  USA                                               *
  *                                                                           *
  * Copyright (C) 2011      Tomas Gavenciak gavento@ucw.cz                  *
- * Copyright (C) 2011      Cyril Hrubis metan@ucw.cz                       *
+ * Copyright (C) 2011-2012 Cyril Hrubis metan@ucw.cz                       *
  *                                                                           *
  *****************************************************************************/
@@ -38,12 +38,13 @@
  * GetPixel with context transformations and clipping.
  * Returns 0 for clipped pixels or pixels outside bitmap.
  */
-GP_Pixel GP_GetPixel(const GP_Context *context, int x, int y);
+GP_Pixel GP_GetPixel(const GP_Context *context, GP_Coord x, GP_Coord y);
/*
  * Version of GetPixel without transformations nor border checking.
  */
-static inline GP_Pixel GP_GetPixel_Raw(const GP_Context *context, int x, int y)
+static inline GP_Pixel GP_GetPixel_Raw(const GP_Context *context,
+                                       GP_Coord x, GP_Coord y)
 {
    GP_FN_RET_PER_BPP(GP_GetPixel_Raw, context->bpp, context->bit_endian, 
    	context, x, y);
@@ -52,22 +53,44 @@ static inline GP_Pixel GP_GetPixel_Raw(const GP_Context *context, int x, int y)
 }
/*
+ * Version of GetPixel without transformations and with border checking.
+ */
+static inline GP_Pixel GP_GetPixel_Raw_Clipped(const GP_Context *context,
+                                               GP_Coord x, GP_Coord y)
+{
+	if (GP_PIXEL_IS_CLIPPED(context, x, y))
+		return 0;
+
+	return GP_GetPixel_Raw(context, x, y);
+}
+
+/*
  * PutPixel with context transformations and clipping.
  * NOP for clipped pixels or pixels outside bitmap.
  */
-void GP_PutPixel(GP_Context *context, int x, int y, GP_Pixel p);
+void GP_PutPixel(GP_Context *context, GP_Coord x, GP_Coord y, GP_Pixel p);
/*
  * Version of PutPixel without transformations nor border checking.
  */
-static inline void GP_PutPixel_Raw(GP_Context *context, int x, int y,
-                                   GP_Pixel p)
+static inline void GP_PutPixel_Raw(GP_Context *context,
+                                   GP_Coord x, GP_Coord y, GP_Pixel p)
 {
    GP_FN_PER_BPP(GP_PutPixel_Raw, context->bpp, context->bit_endian, 
    	context, x, y, p);
 }
/*
+ * Version of PutPixel without transformation and with border checking.
+ */
+static inline void GP_PutPixel_Raw_Clipped(GP_Context *context,
+                                           GP_Coord x, GP_Coord y, GP_Pixel p)
+{
+	GP_FN_PER_BPP(GP_PutPixel_Raw_Clipped, context->bpp, context->bit_endian,
+	              context, x, y, p);
+}
+
+/*
  * Returns pixel offset.
  */
 uint8_t GP_PixelAddrOffset(GP_Coord x, GP_PixelType pixel_type);
diff --git a/include/core/GP_Transform.h b/include/core/GP_Transform.h
index cc6e8b4..e903d69 100644
--- a/include/core/GP_Transform.h
+++ b/include/core/GP_Transform.h
@@ -28,6 +28,7 @@
 #ifndef CORE_GP_TRANSFORM_H
 #define CORE_GP_TRANSFORM_H
+#include "GP_Common.h"
 #include "GP_FixedPoint.h"
/* 
diff --git a/libs/core/GP_GetPutPixel.c b/libs/core/GP_GetPutPixel.c
index 6550275..83e4ff2 100644
--- a/libs/core/GP_GetPutPixel.c
+++ b/libs/core/GP_GetPutPixel.c
@@ -17,13 +17,14 @@
  * Boston, MA  02110-1301  USA                                               *
  *                                                                           *
  * Copyright (C) 2011      Tomas Gavenciak gavento@ucw.cz                  *
+ * Copyright (C) 2012      Cyril Hrubis metan@ucw.cz                       *
  *                                                                           *
  *****************************************************************************/
#include "GP_GetPutPixel.h"
 #include "GP_Transform.h"
-GP_Pixel GP_GetPixel(const GP_Context *context, int x, int y)
+GP_Pixel GP_GetPixel(const GP_Context *context, GP_Coord x, GP_Coord y)
 {
    GP_TRANSFORM_POINT(context, x, y);
    if (GP_PIXEL_IS_CLIPPED(context, x, y)) 
@@ -31,7 +32,7 @@ GP_Pixel GP_GetPixel(const GP_Context *context, int x, int y)
    return GP_GetPixel_Raw(context, x, y);
 }
-void GP_PutPixel(GP_Context *context, int x, int y, GP_Pixel p)
+void GP_PutPixel(GP_Context *context, GP_Coord x, GP_Coord y, GP_Pixel p)
 {
    GP_TRANSFORM_POINT(context, x, y);
    if (!GP_PIXEL_IS_CLIPPED(context, x, y)) 
diff --git a/libs/gfx/GP_RectAA.c b/libs/gfx/GP_RectAA.c
index 4225fd0..66e24b6 100644
--- a/libs/gfx/GP_RectAA.c
+++ b/libs/gfx/GP_RectAA.c
@@ -53,7 +53,7 @@ void GP_FillRectXYXY_AA_Raw(GP_Context *context, GP_Coord x0, GP_Coord y0,
    GP_Coord yi1 = GP_FP_FLOOR(y1);
if (xi1 >= xi0 && yi1 >= yi0)
-		GP_FillRect(context, xi0, yi0, xi1, yi1, pixel);
+		GP_FillRect_Raw(context, xi0, yi0, xi1, yi1, pixel);
    
    printf("%i %i %i %in", xi0, yi0, yi1, yi1);
@@ -67,54 +67,52 @@ void GP_FillRectXYXY_AA_Raw(GP_Context *context, GP_Coord x0, GP_Coord y0,
    d_perc = GP_GammaToLinear(GP_FP_FRAC(y1));
for (i = GP_FP_CEIL(x0); i <= GP_FP_FLOOR(x1); i++) {
-		GP_Pixel u = GP_GetPixel(context, i, GP_FP_FLOOR(y0));
-		GP_Pixel d = GP_GetPixel(context, i, GP_FP_CEIL(y1));
+		GP_Pixel u = GP_GetPixel_Raw_Clipped(context, i, GP_FP_FLOOR(y0));
+		GP_Pixel d = GP_GetPixel_Raw_Clipped(context, i, GP_FP_CEIL(y1));
    	
    	u = GP_MixPixels(pixel, u, u_perc, context->pixel_type);
    	d = GP_MixPixels(pixel, d, d_perc, context->pixel_type);
    	
-		GP_PutPixel(context, i, GP_FP_FLOOR(y0), u);
-		GP_PutPixel(context, i, GP_FP_CEIL(y1), d);
+		GP_PutPixel_Raw_Clipped(context, i, GP_FP_FLOOR(y0), u);
+		GP_PutPixel_Raw_Clipped(context, i, GP_FP_CEIL(y1), d);
    }
u_perc = GP_GammaToLinear(GP_FP_1 - GP_FP_FRAC(x0));
    d_perc = GP_GammaToLinear(GP_FP_FRAC(x1));
    
    for (i = GP_FP_CEIL(y0); i <= GP_FP_FLOOR(y1); i++) {
-		GP_Pixel u = GP_GetPixel(context, GP_FP_FLOOR(x0), i);
-		GP_Pixel d = GP_GetPixel(context, GP_FP_CEIL(x1), i);
+		GP_Pixel u = GP_GetPixel_Raw_Clipped(context, GP_FP_FLOOR(x0), i);
+		GP_Pixel d = GP_GetPixel_Raw_Clipped(context, GP_FP_CEIL(x1), i);
    	
    	u = GP_MixPixels(pixel, u, u_perc, context->pixel_type);
    	d = GP_MixPixels(pixel, d, d_perc, context->pixel_type);
    	
-		GP_PutPixel(context, GP_FP_FLOOR(x0), i, u);
-		GP_PutPixel(context, GP_FP_CEIL(x1), i, d);
+		GP_PutPixel_Raw_Clipped(context, GP_FP_FLOOR(x0), i, u);
+		GP_PutPixel_Raw_Clipped(context, GP_FP_CEIL(x1), i, d);
    }
-	return;
-
    uint8_t perc;
    GP_Pixel p;
-	perc = GP_GammaToLinear((GP_FP_FRAC(x0) + GP_FP_FRAC(y0) + 1)/2);
-	p = GP_GetPixel(context, GP_FP_FLOOR(x0), GP_FP_FLOOR(y0));
+	perc = GP_GammaToLinear(GP_FP_1 - (GP_FP_FRAC(x0) + GP_FP_1 - GP_FP_FRAC(y0) + 2)/4);
+	p = GP_GetPixel_Raw_Clipped(context, GP_FP_FLOOR(x0), GP_FP_FLOOR(y0));
    p = GP_MixPixels(pixel, p, perc, context->pixel_type);
-	GP_PutPixel(context, GP_FP_FLOOR(x0), GP_FP_FLOOR(y0), p);
+	GP_PutPixel_Raw_Clipped(context, GP_FP_FLOOR(x0), GP_FP_FLOOR(y0), p);
-	perc = GP_GammaToLinear((GP_FP_FRAC(x1) + GP_FP_FRAC(y0) + 1)/2);
-	p = GP_GetPixel(context, (x1>>8) + 1, (y0>>8) - 1);
+	perc = GP_GammaToLinear((GP_FP_FRAC(x1) + GP_FP_1 - GP_FP_FRAC(y0) + 2)/4);
+	p = GP_GetPixel_Raw_Clipped(context, GP_FP_CEIL(x1), GP_FP_FLOOR(y0));
    p = GP_MixPixels(pixel, p, perc, context->pixel_type);
-	GP_PutPixel(context, (x1>>8) + 1, (y0>>8) - 1, p);
+	GP_PutPixel_Raw_Clipped(context, GP_FP_CEIL(x1), GP_FP_FLOOR(y0), p);
-	perc = GP_GammaToLinear((GP_FP_FRAC(x0) + GP_FP_FRAC(y1) + 1)/2);
-	p = GP_GetPixel(context, (x0>>8) - 1, (y1>>8) + 1);
+	perc = GP_GammaToLinear((GP_FP_1 - GP_FP_FRAC(x0) + GP_FP_FRAC(y1) + 2)/4);
+	p = GP_GetPixel_Raw_Clipped(context, GP_FP_FLOOR(x0), GP_FP_CEIL(y1));
    p = GP_MixPixels(pixel, p, perc, context->pixel_type);
-	GP_PutPixel(context, (x0>>8) - 1, (y1>>8) + 1, p);
+	GP_PutPixel_Raw_Clipped(context, GP_FP_FLOOR(x0), GP_FP_CEIL(y1), p);
    
-	perc = GP_GammaToLinear((GP_FP_FRAC(x1) + GP_FP_FRAC(y1) + 1)/2);
-	p = GP_GetPixel(context, (x1>>8) + 1, (y1>>8) + 1);
+	perc = GP_GammaToLinear((GP_FP_FRAC(x1) + GP_FP_FRAC(y1) + 2)/4);
+	p = GP_GetPixel_Raw_Clipped(context, GP_FP_CEIL(x1), GP_FP_CEIL(y1));
    p = GP_MixPixels(pixel, p, perc, context->pixel_type);
-	GP_PutPixel(context, (x1>>8) + 1, (y1>>8) + 1, p);
+	GP_PutPixel_Raw_Clipped(context, GP_FP_CEIL(x1), GP_FP_CEIL(y1), p);
 }
void GP_FillRectXYWH_AA_Raw(GP_Context *context, GP_Coord x, GP_Coord y,
@@ -135,7 +133,7 @@ void GP_FillRectXYXY_AA(GP_Context *context, GP_Coord x0, GP_Coord y0,
    GP_TRANSFORM_POINT_FP(context, x0, y0);
    GP_TRANSFORM_POINT_FP(context, x1, y1);
-	GP_FillRect_AA_Raw(context, x0, y0, x1, y1, pixel);
+	GP_FillRectXYXY_AA_Raw(context, x0, y0, x1, y1, pixel);
 }
void GP_FillRectXYWH_AA(GP_Context *context, GP_Coord x, GP_Coord y,
-----------------------------------------------------------------------
Summary of changes:
 include/core/GP_GetPutPixel.h |   35 +++++++++++++++++++++++++-----
 include/core/GP_Transform.h   |    1 +
 libs/core/GP_GetPutPixel.c    |    5 ++-
 libs/gfx/GP_RectAA.c          |   46 +++++++++++++++++++---------------------
 4 files changed, 55 insertions(+), 32 deletions(-)
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