[repo.or.cz] gfxprim.git branch generate updated: aa8f80b7334e88d72171f325bb37cfc4b2245d0e - Gfxprim

31 Oct 2011

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http://repo.or.cz/w/gfxprim.git/commit/aa8f80b7334e88d72171f325bb37cfc4b2245...
commit aa8f80b7334e88d72171f325bb37cfc4b2245d0e
Author: Cyril Hrubis metan@ucw.cz
Date:   Mon Oct 31 14:22:24 2011 +0100
Fixed the interpolation filters api.

diff --git a/demos/fbshow/fbshow.c b/demos/fbshow/fbshow.c
index 76dcb99..ffa2c6a 100644
--- a/demos/fbshow/fbshow.c
+++ b/demos/fbshow/fbshow.c
@@ -48,7 +48,7 @@ static GP_Context *image_to_display(GP_Context *img, uint32_t w, uint32_t h)
 {
    float rat = calc_img_size(img->w, img->h, w, h);
-	return GP_FilterResize(img, NULL, GP_INTERP_CUBIC, img->w * rat, img->h * rat);
+	return GP_FilterResize(img, NULL, GP_INTERP_CUBIC, img->w * rat, img->h * rat, NULL);
 }
static int show_image(GP_Framebuffer *fb, const char *img_path, int clear)
diff --git a/demos/grinder/grinder.c b/demos/grinder/grinder.c
index 27d8ded..3582c38 100644
--- a/demos/grinder/grinder.c
+++ b/demos/grinder/grinder.c
@@ -117,7 +117,7 @@ static GP_RetCode resize(GP_Context **c, const char *params)
    GP_Size h = ratio * (*c)->h;
    GP_Context *res = NULL;
-	res = GP_FilterResize(*c, progress_callback, alg, w, h);
+	res = GP_FilterResize(*c, NULL, alg, w, h, progress_callback);
    
    if (res == NULL)
    	return GP_EINVAL;
@@ -177,7 +177,7 @@ static GP_RetCode scale(GP_Context **c, const char *params)
GP_Context *res = NULL;
-	res = GP_FilterResize(*c, progress_callback, alg, w, h);
+	res = GP_FilterResize(*c, NULL, alg, w, h, progress_callback);
if (res == NULL)
    	return GP_EINVAL;
diff --git a/include/filters/GP_Filters.h b/include/filters/GP_Filters.h
index 90f63b3..8e2d84d 100644
--- a/include/filters/GP_Filters.h
+++ b/include/filters/GP_Filters.h
@@ -38,10 +38,10 @@
 /* Point filters, brightness, contrast ... */
 #include "filters/GP_Point.h"
-/* Linear convolution base filters (mostly blurs) */
+/* Linear convolution based filters (mostly blurs) */
 #include "filters/GP_Linear.h"
-/* Image scaling */
+/* Image scaling (resampling) */
 #include "filters/GP_Resize.h"
#endif /* GP_FILTERS_H */
diff --git a/include/filters/GP_Linear.h b/include/filters/GP_Linear.h
index ae028fc..3c0d1e9 100644
--- a/include/filters/GP_Linear.h
+++ b/include/filters/GP_Linear.h
@@ -63,7 +63,8 @@ GP_Context *GP_FilterGaussianBlur(const GP_Context *src, GP_Context *dst,
 /*
  * Linear convolution.
  *
- * The kernel is array of kw * kh floats and is indexed as two directional array.
+ * The kernel is array of kw * kh floats and is indexed as two directional
+ * array.
  *
  * To define 3x3 average filter
  *
diff --git a/include/filters/GP_Resize.h b/include/filters/GP_Resize.h
index 05f80c7..63a6143 100644
--- a/include/filters/GP_Resize.h
+++ b/include/filters/GP_Resize.h
@@ -41,8 +41,8 @@
*/
-#ifndef GP_RESIZE_H
-#define GP_RESIZE_H
+#ifndef FILTERS_GP_RESIZE_H
+#define FILTERS_GP_RESIZE_H
#include "GP_Filter.h"
@@ -51,11 +51,26 @@ typedef enum GP_InterpolationType {
    GP_INTERP_CUBIC, /* Bicubic           */
 } GP_InterpolationType;
-void GP_FilterResize_Raw(GP_Context *src, GP_Context *res,
-                         GP_ProgressCallback *callback,
-		         GP_InterpolationType type);
+/*
+ * Just interpolate the source context into destination context.
+ */
+void GP_FilterResize_Raw(const GP_Context *src, GP_Context *dst,
+                         GP_InterpolationType type,
+                         GP_ProgressCallback *callback);
-GP_Context *GP_FilterResize(GP_Context *src, GP_ProgressCallback *callback,
-                            GP_InterpolationType type, GP_Size w, GP_Size h);
+/*
+ * If destination is non NULL, the w and h are used to create subcontext from
+ * destination which is then used to interpolate the image to.
+ * 
+ * Otherwise if destination is NULL, the context of size w and h is allocated
+ * and returned.
+ *
+ * In both cases the pointer to destination or NULL in case of failure is
+ * returned.
+ */
+GP_Context *GP_FilterResize(const GP_Context *src, GP_Context *dst,
+                            GP_InterpolationType type,
+                            GP_Size w, GP_Size h,
+                            GP_ProgressCallback *callback);
-#endif /* GP_RESIZE_H */
+#endif /* FILTERS_GP_RESIZE_H */
diff --git a/libs/filters/GP_Resize.c b/libs/filters/GP_Resize.c
index 192d5f5..eb42478 100644
--- a/libs/filters/GP_Resize.c
+++ b/libs/filters/GP_Resize.c
@@ -27,27 +27,27 @@
#include <GP_Resize.h>
-void GP_FilterInterpolate_NN(GP_Context *src, GP_Context *res,
+void GP_FilterInterpolate_NN(const GP_Context *src, GP_Context *dst,
                              GP_ProgressCallback *callback)
 {
    GP_Coord x, y;
    
    GP_DEBUG(1, "Scaling image %ux%u -> %ux%u %2.2f %2.2f",
-	            src->w, src->h, res->w, res->h,
-		    1.00 * res->w / src->w, 1.00 * res->h / src->h);
+	            src->w, src->h, dst->w, dst->h,
+		    1.00 * dst->w / src->w, 1.00 * dst->h / src->h);
-	for (y = 0; y < (GP_Coord)res->h; y++) {
-		for (x = 0; x < (GP_Coord)res->w; x++) {
-			GP_Coord xi = (1.00 * x / res->w) * src->w;
-			GP_Coord yi = (1.00 * y / res->h) * src->h;
+	for (y = 0; y < (GP_Coord)dst->h; y++) {
+		for (x = 0; x < (GP_Coord)dst->w; x++) {
+			GP_Coord xi = (1.00 * x / dst->w) * src->w;
+			GP_Coord yi = (1.00 * y / dst->h) * src->h;
    		
    		GP_Pixel pix = GP_GetPixel_Raw_24BPP(src, xi, yi);
-			GP_PutPixel_Raw_24BPP(res, x, y, pix);
+			GP_PutPixel_Raw_24BPP(dst, x, y, pix);
    	}
    
    	if (callback != NULL && y % 100 == 0)
-			GP_ProgressCallbackReport(callback, 100.00 * y/res->h);
+			GP_ProgressCallbackReport(callback, 100.00 * y/dst->h);
    }
GP_ProgressCallbackDone(callback);
@@ -79,18 +79,18 @@ typedef union v4f {
 #define MUL_V4SF(a, b) ((union v4f)((a).v * (b).v))
 #define SUM_V4SF(a)    ((a).f[0] + (a).f[1] + (a).f[2] + (a).f[3])
-void GP_FilterInterpolate_Cubic(GP_Context *src, GP_Context *res,
+void GP_FilterInterpolate_Cubic(const GP_Context *src, GP_Context *dst,
                                 GP_ProgressCallback *callback)
 {
    float col_r[src->h], col_g[src->h], col_b[src->h];
    uint32_t i, j;
GP_DEBUG(1, "Scaling image %ux%u -> %ux%u %2.2f %2.2f",
-	            src->w, src->h, res->w, res->h,
-		    1.00 * res->w / src->w, 1.00 * res->h / src->h);
+	            src->w, src->h, dst->w, dst->h,
+		    1.00 * dst->w / src->w, 1.00 * dst->h / src->h);
-	for (i = 0; i < res->w; i++) {
-		float x = (1.00 * i / res->w) * (src->w - 4.5) + 2.5;
+	for (i = 0; i < dst->w; i++) {
+		float x = (1.00 * i / dst->w) * (src->w - 4.5) + 2.5;
    	v4f cvx;
    	int xi = x - 1;
@@ -140,8 +140,8 @@ void GP_FilterInterpolate_Cubic(GP_Context *src, GP_Context *res,
    	}
/* now interpolate column for new image */
-		for (j = 0; j < res->h; j++) {
-			float y = (1.00 * j / res->h) * (src->h - 4.5) + 2.5;
+		for (j = 0; j < dst->h; j++) {
+			float y = (1.00 * j / dst->h) * (src->h - 4.5) + 2.5;
    		v4f cvy, rv, gv, bv;
    		float r, g, b;
    		int yi = y - 1;
@@ -199,46 +199,58 @@ void GP_FilterInterpolate_Cubic(GP_Context *src, GP_Context *res,
    			b = 0;
    		
    		GP_Pixel pix = GP_Pixel_CREATE_RGB888((uint8_t)r, (uint8_t)g, (uint8_t)b);
-			GP_PutPixel_Raw_24BPP(res, i, j, pix);
+			GP_PutPixel_Raw_24BPP(dst, i, j, pix);
    	}
    	
    	if (callback != NULL && i % 100 == 0)
-			GP_ProgressCallbackReport(callback, 100.00 * i/res->w);
+			GP_ProgressCallbackReport(callback, 100.00 * i/dst->w);
    }
GP_ProgressCallbackDone(callback);
 }
-void GP_FilterResize_Raw(GP_Context *src, GP_Context *res,
-                         GP_ProgressCallback *callback,
-                         GP_InterpolationType type)
+void GP_FilterResize_Raw(const GP_Context *src, GP_Context *dst,
+                         GP_InterpolationType type,
+                         GP_ProgressCallback *callback)
 {
    switch (type) {
    case GP_INTERP_NN:
-		GP_FilterInterpolate_NN(src, res, callback);
+		GP_FilterInterpolate_NN(src, dst, callback);
    break;
    case GP_INTERP_CUBIC:
-		GP_FilterInterpolate_Cubic(src, res, callback);
+		GP_FilterInterpolate_Cubic(src, dst, callback);
    break;
    }
 }
-GP_Context *GP_FilterResize(GP_Context *src, GP_ProgressCallback *callback,
-                            GP_InterpolationType type, GP_Size w, GP_Size h)
+GP_Context *GP_FilterResize(const GP_Context *src, GP_Context *dst,
+                            GP_InterpolationType type,
+                            GP_Size w, GP_Size h,
+                            GP_ProgressCallback *callback)
 {
-	GP_Context *res;
-	
+	GP_Context sub, *res;
+
+	/* TODO: Templatize */
    if (src->pixel_type != GP_PIXEL_RGB888)
    	return NULL;
-	
-	res = GP_ContextAlloc(w, h, GP_PIXEL_RGB888);
-	
-	if (res == NULL) {
-		GP_DEBUG(1, "Malloc failed :(");
-		return NULL;
+
+	if (dst == NULL) {
+		dst = GP_ContextAlloc(w, h, src->pixel_type);
+
+		if (dst == NULL)
+			return NULL;
+
+		res = dst;
+	} else {
+		GP_ASSERT(src->pixel_type == dst->pixel_type,
+		          "The src and dst pixel types must match");
+		/*
+		 * The size of w and h is asserted in subcontext initalization
+		 */	
+		res = GP_ContextSubContext(dst, &sub, 0, 0, w, h);
    }
-	GP_FilterResize_Raw(src, res, callback, type);
+	GP_FilterResize_Raw(src, res, type, callback);
-	return res;
+	return dst;
 }
http://repo.or.cz/w/gfxprim.git/commit/473d31d4feafd632b9cd7c668fb7548a6855c...
commit 473d31d4feafd632b9cd7c668fb7548a6855ce03
Author: Cyril Hrubis metan@ucw.cz
Date:   Mon Oct 31 14:05:32 2011 +0100
Remove the redundant linker flags.
diff --git a/demos/fbshow/Makefile b/demos/fbshow/Makefile
index 2ca7439..0a8147c 100644
--- a/demos/fbshow/Makefile
+++ b/demos/fbshow/Makefile
@@ -3,7 +3,7 @@ TOPDIR=../..
 CSOURCES=$(shell echo *.c)
INCLUDE=
-LDLIBS+=-lGP -L$(TOPDIR)/build/ -lpng
+LDLIBS+=-lGP -L$(TOPDIR)/build/
APPS=fbshow
diff --git a/demos/grinder/Makefile b/demos/grinder/Makefile
index 7cf1e72..a984bd9 100644
--- a/demos/grinder/Makefile
+++ b/demos/grinder/Makefile
@@ -3,7 +3,7 @@ TOPDIR=../..
 CSOURCES=$(shell echo *.c)
INCLUDE=core gfx SDL backends
-LDLIBS+=-lGP -L$(TOPDIR)/build/ -lpng
+LDLIBS+=-lGP -L$(TOPDIR)/build/
APPS=grinder
diff --git a/tests/SDL/Makefile b/tests/SDL/Makefile
index 8c02ba1..123889b 100644
--- a/tests/SDL/Makefile
+++ b/tests/SDL/Makefile
@@ -3,7 +3,7 @@ TOPDIR=../..
 CSOURCES=$(shell echo *.c)
INCLUDE=core gfx SDL backends
-LDLIBS+=-lGP -L$(TOPDIR)/build/ -lGP_SDL -lSDL -lpng
+LDLIBS+=-lGP -L$(TOPDIR)/build/ -lGP_SDL -lSDL
APPS=pixeltest fileview fonttest linetest randomshapetest shapetest sierpinsky      symbolstest textaligntest trianglefps input blittest subcontext showimage
http://repo.or.cz/w/gfxprim.git/commit/8c0a1d4f59d6c69dfbffa2817236b6b18d7f2...
commit 8c0a1d4f59d6c69dfbffa2817236b6b18d7f261b
Author: Cyril Hrubis metan@ucw.cz
Date:   Mon Oct 31 13:57:09 2011 +0100
Allow GP_ContextSubContext() to inialized given buffer.
diff --git a/include/core/GP_Context.h b/include/core/GP_Context.h
index 80794d9..ef2940e 100644
--- a/include/core/GP_Context.h
+++ b/include/core/GP_Context.h
@@ -104,9 +104,15 @@ GP_Context *GP_ContextCopy(const GP_Context *src, int flag);
/*
  * Create subcontext.
+ *
+ * If pointer to subcontext is NULL, new context is allocated
+ * otherwise context pointed by subcontext pointer is initalized.
+ * 
+ * The free_pixels flag is set to 0 upon subcontext initalization so the
+ * GP_ContextFree() would not call free() upon the subcontext->pixels pointer.
  */
-GP_Context *GP_ContextSubContext(GP_Context *context, GP_Coord x, GP_Coord y,
-                                 GP_Size w, GP_Size h);
+GP_Context *GP_ContextSubContext(GP_Context *context, GP_Context *subcontext,
+                                 GP_Coord x, GP_Coord y, GP_Size w, GP_Size h);
/*
  * Converts context to different pixel type.
diff --git a/libs/core/GP_Context.c b/libs/core/GP_Context.c
index 83c9f73..67aca4f 100644
--- a/libs/core/GP_Context.c
+++ b/libs/core/GP_Context.c
@@ -127,17 +127,21 @@ void GP_ContextFree(GP_Context *context)
    free(context);
 }
-GP_Context *GP_ContextSubContext(GP_Context *context, GP_Coord x, GP_Coord y,
-                                 GP_Size w, GP_Size h)
+GP_Context *GP_ContextSubContext(GP_Context *context, GP_Context *subcontext,
+                                 GP_Coord x, GP_Coord y, GP_Size w, GP_Size h)
 {
    GP_CHECK(context, "NULL context");
    GP_CHECK(context->w >= x + w, "Subcontext w out of original context.");
    GP_CHECK(context->h >= y + h, "Subcontext h out of original context.");
+	
+	GP_Context *ret = subcontext;
-	GP_Context *ret = malloc(sizeof(GP_Context));
+	if (ret == NULL) {
+		GP_Context *ret = malloc(sizeof(GP_Context));
-	if (ret == NULL)
-		return NULL;
+		if (ret == NULL)
+			return NULL;
+	}
ret->bpp           = context->bpp;
    ret->bytes_per_row = context->bytes_per_row;
diff --git a/tests/SDL/subcontext.c b/tests/SDL/subcontext.c
index bbdfeae..25db7fb 100644
--- a/tests/SDL/subcontext.c
+++ b/tests/SDL/subcontext.c
@@ -260,7 +260,7 @@ int main(int argc, char *argv[])
    white = GP_ColorToContextPixel(GP_COL_WHITE, &context);
    gray  = GP_ColorToContextPixel(GP_COL_GRAY_DARK, &context);
-	sub_context = GP_ContextSubContext(&context, 100, 100, 440, 280);
+	sub_context = GP_ContextSubContext(&context, NULL, 100, 100, 440, 280);
    GP_Fill(sub_context, gray);
timer = SDL_AddTimer(60, timer_callback, NULL);
-----------------------------------------------------------------------
Summary of changes:
 demos/fbshow/Makefile        |    2 +-
 demos/fbshow/fbshow.c        |    2 +-
 demos/grinder/Makefile       |    2 +-
 demos/grinder/grinder.c      |    4 +-
 include/core/GP_Context.h    |   10 ++++-
 include/filters/GP_Filters.h |    4 +-
 include/filters/GP_Linear.h  |    3 +-
 include/filters/GP_Resize.h  |   31 ++++++++++++----
 libs/core/GP_Context.c       |   14 +++++---
 libs/filters/GP_Resize.c     |   82 ++++++++++++++++++++++++------------------
 tests/SDL/Makefile           |    2 +-
 tests/SDL/subcontext.c       |    2 +-
 12 files changed, 98 insertions(+), 60 deletions(-)
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