[Gfxprim] [repo.or.cz] gfxprim.git branch generate updated: 108607fa657f1e25d17ee497bfc1b840f5e9ac0c

2 Oct 2011

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http://repo.or.cz/w/gfxprim.git/commit/108607fa657f1e25d17ee497bfc1b840f5e9a...
commit 108607fa657f1e25d17ee497bfc1b840f5e9ac0c
Author: Cyril Hrubis metan@ucw.cz
Date:   Sun Oct 2 17:08:41 2011 +0200
Way more work on the progress callback.

diff --git a/demos/grinder/grinder.c b/demos/grinder/grinder.c
index 4ea0543..8da1833 100644
--- a/demos/grinder/grinder.c
+++ b/demos/grinder/grinder.c
@@ -29,6 +29,16 @@
#include "params.h"
+static GP_ProgressCallback *progress_callback = NULL;
+
+static const char *progress_prefix = NULL;
+
+static void show_progress(GP_ProgressCallback *self)
+{
+	fprintf(stderr, "rFilter %s %3.2f%%",
+	        progress_prefix, self->percentage);
+}
+
 static int param_err(const struct param *self, const char *val, void *priv)
 {
    /* invalid parameter name */
@@ -107,7 +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, NULL, alg, w, h);
+	res = GP_FilterResize(*c, progress_callback, alg, w, h);
    
    if (res == NULL)
    	return GP_EINVAL;
@@ -161,7 +171,7 @@ static GP_RetCode scale(GP_Context **c, const char *params)
GP_Context *res = NULL;
-	res = GP_FilterResize(*c, NULL, alg, w, h);
+	res = GP_FilterResize(*c, progress_callback, alg, w, h);
if (res == NULL)
    	return GP_EINVAL;
@@ -296,7 +306,7 @@ static GP_RetCode blur(GP_Context **c, const char *params)
    
    GP_Context *res = NULL;
-	res = GP_FilterGaussianBlur(*c, sigma);
+	res = GP_FilterGaussianBlur(*c, progress_callback, sigma, sigma);
if (res == NULL)
    	return GP_EINVAL;
@@ -393,11 +403,18 @@ static void apply_filters(GP_Context **src)
    unsigned int i;
    GP_RetCode ret;
-	for (i = 0; i < filter_cnt; i++)
+	for (i = 0; i < filter_cnt; i++) {
+		
+		progress_prefix = filters[i]->name;
+
    	if ((ret = filters[i]->apply(src, filter_params[i]))) {
    		fprintf(stderr, "Error: %sn", GP_RetCodeName(ret));
    		exit(1);
    	}
+		
+		if (progress_callback != NULL)
+			fprintf(stderr, " donen");
+	}
 }
static const char *app_help = {
@@ -416,6 +433,7 @@ static const char *app_help = {
    "                 ===============                      n"
    "                                                      n"
    "-h        - prints this help                          n"
+	"-p        - show filter progress                      n"
    "-v int    - sets gfxprim verbosity level              n"
    "-f params - apply filter, multiple filters may be usedn"
    "                                                      n"
@@ -445,7 +463,11 @@ int main(int argc, char *argv[])
    GP_RetCode ret;
    int opt, i;
-	while ((opt = getopt(argc, argv, "f:hv:")) != -1) {
+	GP_ProgressCallback callback = {
+		.callback = show_progress,
+	};
+
+	while ((opt = getopt(argc, argv, "f:hpv:")) != -1) {
    	switch (opt) {
    	case 'h':
    		print_help();
@@ -457,6 +479,9 @@ int main(int argc, char *argv[])
    	case 'f':
    		add_filter(optarg);
    	break;
+		case 'p':
+			progress_callback = &callback;
+		break;
    	default:
    		print_help();
    		return 1;
diff --git a/include/filters/GP_Linear.h b/include/filters/GP_Filter.h
similarity index 71%
copy from include/filters/GP_Linear.h
copy to include/filters/GP_Filter.h
index 98e53f0..cc9918d 100644
--- a/include/filters/GP_Linear.h
+++ b/include/filters/GP_Filter.h
@@ -22,15 +22,37 @@
/*
-   Linear filters.
+  Common filters typedefs and includes.
*/
-#ifndef GP_LINEAR_H
-#define GP_LINEAR_H
+#ifndef GP_FILTER_H
+#define GP_FILTER_H
-#include <GP_Context.h>
+#include "core/GP_Context.h"
-GP_Context *GP_FilterGaussianBlur(GP_Context *src, float sigma);
+/*
+ * Progress callback
+ */
+typedef struct GP_ProgressCallback {
+	float percentage;
+	void (*callback)(struct GP_ProgressCallback *self);
+	void *priv;
+} GP_ProgressCallback;
+
+static inline void GP_ProgressCallbackReport(GP_ProgressCallback *callback,
+                                             float percentage)
+{
+	if (callback == NULL)
+		return;
+
+	callback->percentage = percentage;
+	callback->callback(callback);
+}
+
+static inline void GP_ProgressCallbackDone(GP_ProgressCallback *callback)
+{
+	GP_ProgressCallbackReport(callback, 100);
+}
-#endif /* GP_LINEAR_H */
+#endif /* GP_FILTER_H */
diff --git a/include/filters/GP_Linear.h b/include/filters/GP_Linear.h
index 98e53f0..ae0debd 100644
--- a/include/filters/GP_Linear.h
+++ b/include/filters/GP_Linear.h
@@ -29,8 +29,24 @@
 #ifndef GP_LINEAR_H
 #define GP_LINEAR_H
-#include <GP_Context.h>
+#include "GP_Filter.h"
-GP_Context *GP_FilterGaussianBlur(GP_Context *src, float sigma);
+/*
+ * Gaussian blur
+ *
+ * The sigma parameters defines the blur radii in horizontal and vertical
+ * direction.
+ * 
+ * This variant could work in-place so it's perectly okay to call
+ *
+ * GP_FilterGaussianBlur_Raw(context, context, ...);
+ */
+void GP_FilterGaussianBlur_Raw(GP_Context *src, GP_Context *res,
+                               GP_ProgressCallback *callback,
+			       float sigma_x, float sigma_y);
+
+GP_Context *GP_FilterGaussianBlur(GP_Context *src,
+                                  GP_ProgressCallback *callback,
+                                  float sigma_x, float sigma_y);
#endif /* GP_LINEAR_H */
diff --git a/include/filters/GP_Resize.h b/include/filters/GP_Resize.h
index 884a8f7..54acaed 100644
--- a/include/filters/GP_Resize.h
+++ b/include/filters/GP_Resize.h
@@ -52,10 +52,10 @@ typedef enum GP_InterpolationType {
 } GP_InterpolationType;
void GP_FilterResize_Raw(GP_Context *src, GP_Context *res,
-                         GP_ProgressCallback callback,
+                         GP_ProgressCallback *callback,
    	         GP_InterpolationType type);
-GP_Context *GP_FilterResize(GP_Context *src, GP_ProgressCallback callback,
+GP_Context *GP_FilterResize(GP_Context *src, GP_ProgressCallback *callback,
                             GP_InterpolationType type, GP_Size w, GP_Size h);
#endif /* GP_RESIZE_H */
diff --git a/libs/filters/GP_Linear.c b/libs/filters/GP_Linear.c
index 764d6b6..1538ee2 100644
--- a/libs/filters/GP_Linear.c
+++ b/libs/filters/GP_Linear.c
@@ -29,46 +29,102 @@
#include <GP_Linear.h>
-static void GP_FilterLinearConvolution(const GP_Context *src, GP_Context *dst,
+static void GP_FilterLinearConvolution(const GP_Context *src, GP_Context *res,
+                                       GP_ProgressCallback *callback,
                                        float kernel[], uint32_t kw, uint32_t kh);
-GP_Context *GP_FilterGaussianBlur(GP_Context *src, float sigma)
+static inline unsigned int gaussian_kernel_size(float sigma)
 {
-	GP_Context *dst;
-	
-	if (src->pixel_type != GP_PIXEL_RGB888)
-		return NULL;
-
-	dst = GP_ContextCopy(src, 0);
-
-	if (dst == NULL)
-		return NULL;
+	int center = 3 * sigma;
+	return 2 * center + 1;
+}
-	/* compute kernel */
+static inline void gaussian_kernel_init(float sigma, float *kernel)
+{
    int i, center = 3 * sigma;
    int N = 2 * center + 1;
-	float kernel[N];
-
+	
    double sigma2 = sigma * sigma;
-
+	
    for (i = 0; i < N; i++) {
    	double r = center - i;
-	
    	kernel[i] = exp(-0.5 * (r * r) / sigma2);
    }
+}
-	GP_DEBUG(1, "Gaussian blur sigma=%2.3f kernel %ix%i image %ux%u",
-	            sigma, N, N, src->w, src->h);
+static void gaussian_callback_1(GP_ProgressCallback *self)
+{
+	GP_ProgressCallbackReport(self->priv, self->percentage/2);
+}
-	/* apply in both directions */
-	GP_FilterLinearConvolution(src, dst, kernel, N, 1);
-	GP_FilterLinearConvolution(dst, dst, kernel, 1, N);
+static void gaussian_callback_2(GP_ProgressCallback *self)
+{
+	GP_ProgressCallbackReport(self->priv, self->percentage/2 + 50);
+}
+
+void GP_FilterGaussianBlur_Raw(GP_Context *src, GP_Context *res,
+                               GP_ProgressCallback *callback,
+                               float sigma_x, float sigma_y)
+{
+	unsigned int size_x = gaussian_kernel_size(sigma_x);
+	unsigned int size_y = gaussian_kernel_size(sigma_y);
+	
+	GP_DEBUG(1, "Gaussian blur sigma_x=%2.3f sigma_y=%2.3f kernel %ix%i image %ux%u",
+	            sigma_x, sigma_y, size_x, size_y, src->w, src->h);
+	
+	GP_ProgressCallback *new_callback = NULL;
-	return dst;
+	GP_ProgressCallback gaussian_callback = {
+		.callback = gaussian_callback_1,
+		.priv = callback
+	};
+
+	if (callback != NULL)
+		new_callback = &gaussian_callback;
+
+	/* compute kernel and apply on horizontal direction */
+	float kernel_x[size_x];
+	gaussian_kernel_init(sigma_x, kernel_x);
+	GP_FilterLinearConvolution(src, res, new_callback, kernel_x, size_x, 1);
+
+	if (new_callback != NULL)
+		new_callback->callback = gaussian_callback_2;
+
+	/* compute kernel and apply on vertical direction */
+	float kernel_y[size_y];
+	gaussian_kernel_init(sigma_y, kernel_y);
+	GP_FilterLinearConvolution(res, res, new_callback, kernel_y, 1, size_y);
+	
+	if (callback != NULL) {
+		callback->percentage = 100;
+		callback->callback(callback);
+	}
 }
-static void GP_FilterLinearConvolution(const GP_Context *src, GP_Context *dst,
+GP_Context *GP_FilterGaussianBlur(GP_Context *src,
+                                  GP_ProgressCallback *callback,
+                                  float sigma_x, float sigma_y)
+{
+	GP_Context *res;
+	
+	if (src->pixel_type != GP_PIXEL_RGB888)
+		return NULL;
+
+	res = GP_ContextCopy(src, 0);
+
+	if (res == NULL) {
+		GP_DEBUG(1, "Malloc failed :(");
+		return NULL;
+	}
+
+	GP_FilterGaussianBlur_Raw(src, res, callback, sigma_x, sigma_y);
+
+	return res;
+}
+
+static void GP_FilterLinearConvolution(const GP_Context *src, GP_Context *res,
+                                       GP_ProgressCallback *callback,
                                        float kernel[], uint32_t kw, uint32_t kh)
 {
    float kernel_sum = 0;
@@ -83,7 +139,7 @@ static void GP_FilterLinearConvolution(const GP_Context *src, GP_Context *dst,
    	kernel_sum += kernel[i];
/* do linear convolution */	
-	for (y = 0; y < (GP_Coord)dst->h; y++) {
+	for (y = 0; y < (GP_Coord)res->h; y++) {
    	GP_Pixel pix;
    	uint32_t R[kw][kh], G[kw][kh], B[kw][kh];
@@ -112,7 +168,7 @@ static void GP_FilterLinearConvolution(const GP_Context *src, GP_Context *dst,
int idx = kw - 1;
-		for (x = 0; x < (GP_Coord)dst->w; x++) {
+		for (x = 0; x < (GP_Coord)res->w; x++) {
    		float r = 0, g = 0, b = 0;
for (j = 0; j < kh; j++) {
@@ -166,13 +222,17 @@ static void GP_FilterLinearConvolution(const GP_Context *src, GP_Context *dst,
pix = GP_Pixel_CREATE_RGB888((uint32_t)r, (uint32_t)g, (uint32_t)b);
-			GP_PutPixel_Raw_24BPP(dst, x, y, pix);
+			GP_PutPixel_Raw_24BPP(res, x, y, pix);
    	
    		idx++;
if (idx >= (int)kw)
    			idx = 0;
    	}
+		
+		if (callback != NULL && y % 100 == 0)
+			GP_ProgressCallbackReport(callback, 100.00 * y/res->h);
    }
-}
+	GP_ProgressCallbackDone(callback);
+}
diff --git a/libs/filters/GP_Resize.c b/libs/filters/GP_Resize.c
index 50041c2..6f944a6 100644
--- a/libs/filters/GP_Resize.c
+++ b/libs/filters/GP_Resize.c
@@ -28,7 +28,7 @@
 #include <GP_Resize.h>
void GP_FilterInterpolate_NN(GP_Context *src, GP_Context *res,
-                             GP_ProgressCallback callback)
+                             GP_ProgressCallback *callback)
 {
    GP_Coord x, y;
    
@@ -45,7 +45,12 @@ void GP_FilterInterpolate_NN(GP_Context *src, GP_Context *res,
GP_PutPixel_Raw_24BPP(res, x, y, pix);
    	}
+	
+		if (callback != NULL && y % 100 == 0)
+			GP_ProgressCallbackReport(callback, 100.00 * y/res->h);
    }
+
+	GP_ProgressCallbackDone(callback);
 }
#define A 0.5
@@ -75,7 +80,7 @@ typedef union v4f {
 #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,
-                                GP_ProgressCallback callback)
+                                GP_ProgressCallback *callback)
 {
    float col_r[src->h], col_g[src->h], col_b[src->h];
    uint32_t i, j;
@@ -196,11 +201,16 @@ void GP_FilterInterpolate_Cubic(GP_Context *src, GP_Context *res,
    		GP_Pixel pix = GP_Pixel_CREATE_RGB888((uint8_t)r, (uint8_t)g, (uint8_t)b);
    		GP_PutPixel_Raw_24BPP(res, i, j, pix);
    	}
+		
+		if (callback != NULL && i % 100 == 0)
+			GP_ProgressCallbackReport(callback, 100.00 * i/res->w);
    }
+
+	GP_ProgressCallbackDone(callback);
 }
void GP_FilterResize_Raw(GP_Context *src, GP_Context *res,
-                         GP_ProgressCallback callback,
+                         GP_ProgressCallback *callback,
                          GP_InterpolationType type)
 {
    switch (type) {
@@ -213,7 +223,7 @@ void GP_FilterResize_Raw(GP_Context *src, GP_Context *res,
    }
 }
-GP_Context *GP_FilterResize(GP_Context *src, GP_ProgressCallback callback,
+GP_Context *GP_FilterResize(GP_Context *src, GP_ProgressCallback *callback,
                             GP_InterpolationType type, GP_Size w, GP_Size h)
 {
    GP_Context *res;
http://repo.or.cz/w/gfxprim.git/commit/27108512e85e27b4f46c4be703126f2b2ee9f...
commit 27108512e85e27b4f46c4be703126f2b2ee9fd68
Author: Cyril Hrubis metan@ucw.cz
Date:   Sun Oct 2 15:09:51 2011 +0200
The GP.h header shouldn't be used in library itself.
diff --git a/libs/core/GP_Blit.gen.c.t b/libs/core/GP_Blit.gen.c.t
index 2491b0b..2bc3f69 100644
--- a/libs/core/GP_Blit.gen.c.t
+++ b/libs/core/GP_Blit.gen.c.t
@@ -6,7 +6,7 @@
 #include <stdio.h>
 #include <string.h>
 #include "GP_Pixel.h"
-#include "GP.h"
+#include "GP_GetPutPixel.h"
 #include "GP_Context.h"
 #include "GP_Blit.h"
http://repo.or.cz/w/gfxprim.git/commit/af00d9dd985a5b6a6ef304281a94ddd245e05...
commit af00d9dd985a5b6a6ef304281a94ddd245e05cc4
Author: Cyril Hrubis metan@ucw.cz
Date:   Sun Oct 2 12:33:02 2011 +0200
Cleaned up resize filters api, prepared for progress callback.
diff --git a/demos/grinder/grinder.c b/demos/grinder/grinder.c
index 82e7228..4ea0543 100644
--- a/demos/grinder/grinder.c
+++ b/demos/grinder/grinder.c
@@ -107,15 +107,8 @@ static GP_RetCode resize(GP_Context **c, const char *params)
    GP_Size h = ratio * (*c)->h;
    GP_Context *res = NULL;
-	switch (alg) {
-	case 0:
-		res = GP_Scale_NN(*c, w, h);
-	break;
-	case 1:
-		res = GP_Scale_BiCubic(*c, w, h);
-	break;
-	}
-
+	res = GP_FilterResize(*c, NULL, alg, w, h);
+	
    if (res == NULL)
    	return GP_EINVAL;
@@ -168,14 +161,7 @@ static GP_RetCode scale(GP_Context **c, const char *params)
GP_Context *res = NULL;
-	switch (alg) {
-	case 0:
-		res = GP_Scale_NN(*c, w, h);
-	break;
-	case 1:
-		res = GP_Scale_BiCubic(*c, w, h);
-	break;
-	}
+	res = GP_FilterResize(*c, NULL, alg, w, h);
if (res == NULL)
    	return GP_EINVAL;
diff --git a/include/filters/GP_Filters.h b/include/filters/GP_Filters.h
index fc498b0..90f63b3 100644
--- a/include/filters/GP_Filters.h
+++ b/include/filters/GP_Filters.h
@@ -35,10 +35,13 @@
 /* Image rotations (90 180 270 grads) and mirroring */
 #include "filters/GP_Rotate.h"
+/* Point filters, brightness, contrast ... */
 #include "filters/GP_Point.h"
+
+/* Linear convolution base filters (mostly blurs) */
 #include "filters/GP_Linear.h"
-/* Image down and up scaling */
-#include "filters/GP_Scale.h"
+/* Image scaling */
+#include "filters/GP_Resize.h"
#endif /* GP_FILTERS_H */
diff --git a/include/filters/GP_Scale.h b/include/filters/GP_Resize.h
similarity index 63%
rename from include/filters/GP_Scale.h
rename to include/filters/GP_Resize.h
index 06414c2..884a8f7 100644
--- a/include/filters/GP_Scale.h
+++ b/include/filters/GP_Resize.h
@@ -22,31 +22,40 @@
/*
-  GP_Context resize.
+  GP_Context interpolations.
- */
+  Nearest Neighbour
+  ~~~~~~~~~~~~~~~~~
-#ifndef GP_SCALE_H
-#define GP_SCALE_H
+  Fast, but produces pixelated images. Works however well for images with sharp
+  edges mostly consisting of big one color regions (eg doesn't blur the
+  result on upscaling).
-#include "core/GP_Context.h"
-/*
- * Nearest neighbour
- * 
- * Faster than others, but produces pixelated images. Works however well for
- * images with sharp edges mostly consisting of big once color parts (eg
- * doesn't blurr the result on upscaling).
- */
-GP_Context *GP_Scale_NN(GP_Context *src, GP_Size w, GP_Size h);
+  Bicubic
+  ~~~~~~~
+  
+  Works well for upscaling as is. To get decent result on downscaling,
+  low-pass filter (for example gaussian blur) must be used on original image
+  before scaling is done.
-/*
- * Bicubic Scaling
- *
- * Works well for upscaling. Not so good for downscaling big images to small
- * ones (looses too much information).
  */
-GP_Context *GP_Scale_BiCubic(GP_Context *src, GP_Size w, GP_Size h);
+#ifndef GP_RESIZE_H
+#define GP_RESIZE_H
+
+#include "GP_Filter.h"
+
+typedef enum GP_InterpolationType {
+	GP_INTER_NN,    /* Nearest Neighbour */
+	GP_INTER_CUBIC, /* Bicubic           */
+} GP_InterpolationType;
+
+void GP_FilterResize_Raw(GP_Context *src, GP_Context *res,
+                         GP_ProgressCallback callback,
+		         GP_InterpolationType type);
+
+GP_Context *GP_FilterResize(GP_Context *src, GP_ProgressCallback callback,
+                            GP_InterpolationType type, GP_Size w, GP_Size h);
-#endif /* GP_SCALE_H */
+#endif /* GP_RESIZE_H */
diff --git a/libs/filters/GP_Scale.c b/libs/filters/GP_Resize.c
similarity index 75%
rename from libs/filters/GP_Scale.c
rename to libs/filters/GP_Resize.c
index 88c14a9..50041c2 100644
--- a/libs/filters/GP_Scale.c
+++ b/libs/filters/GP_Resize.c
@@ -25,38 +25,27 @@
#include <GP_Debug.h>
-#include <GP_Scale.h>
+#include <GP_Resize.h>
-
-GP_Context *GP_Scale_NN(GP_Context *src, GP_Size w, GP_Size h)
+void GP_FilterInterpolate_NN(GP_Context *src, GP_Context *res,
+                             GP_ProgressCallback callback)
 {
-	GP_Context *dst;
-
-	if (src->pixel_type != GP_PIXEL_RGB888)
-		return NULL;
-
-	dst = GP_ContextAlloc(w, h, GP_PIXEL_RGB888);
-
-	if (dst == NULL)
-		return NULL;
-
-	GP_DEBUG(1, "Scaling image %ux%u -> %ux%u %2.2f %2.2f",
-	            src->w, src->h, w, h,
-		    1.00 * w / src->w, 1.00 * h / src->h);
-
    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);
-	for (y = 0; y < (int)h; y++)
-		for (x = 0; x < (int)w; x++) {
-			GP_Coord xi = (1.00 * x / w) * src->w;
-			GP_Coord yi = (1.00 * y / 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;
    		
    		GP_Pixel pix = GP_GetPixel_Raw_24BPP(src, xi, yi);
-			GP_PutPixel_Raw_24BPP(dst, x, y, pix);
+			GP_PutPixel_Raw_24BPP(res, x, y, pix);
    	}
-
-	return dst;
+	}
 }
#define A 0.5
@@ -85,26 +74,18 @@ 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])
-GP_Context *GP_Scale_BiCubic(GP_Context *src, GP_Size w, GP_Size h)
+void GP_FilterInterpolate_Cubic(GP_Context *src, GP_Context *res,
+                                GP_ProgressCallback callback)
 {
-	GP_Context *dst;
    float col_r[src->h], col_g[src->h], col_b[src->h];
    uint32_t i, j;
-	if (src->pixel_type != GP_PIXEL_RGB888)
-		return NULL;
-	
-	dst = GP_ContextAlloc(w, h, GP_PIXEL_RGB888);
-	
-	if (dst == NULL)
-		return NULL;
-
    GP_DEBUG(1, "Scaling image %ux%u -> %ux%u %2.2f %2.2f",
-	            src->w, src->h, w, h,
-		    1.00 * w / src->w, 1.00 * h / src->h);
+	            src->w, src->h, res->w, res->h,
+		    1.00 * res->w / src->w, 1.00 * res->h / src->h);
-	for (i = 0; i < w; i++) {
-		float x = (1.00 * i / w) * (src->w - 4.5) + 2.5;
+	for (i = 0; i < res->w; i++) {
+		float x = (1.00 * i / res->w) * (src->w - 4.5) + 2.5;
    	v4f cvx;
    	int xi = x - 1;
@@ -154,8 +135,8 @@ GP_Context *GP_Scale_BiCubic(GP_Context *src, GP_Size w, GP_Size h)
    	}
/* now interpolate column for new image */
-		for (j = 0; j < h; j++) {
-			float y = (1.00 * j / h) * (src->h - 4.5) + 2.5;
+		for (j = 0; j < res->h; j++) {
+			float y = (1.00 * j / res->h) * (src->h - 4.5) + 2.5;
    		v4f cvy, rv, gv, bv;
    		float r, g, b;
    		int yi = y - 1;
@@ -213,9 +194,41 @@ GP_Context *GP_Scale_BiCubic(GP_Context *src, GP_Size w, GP_Size h)
    			b = 0;
    		
    		GP_Pixel pix = GP_Pixel_CREATE_RGB888((uint8_t)r, (uint8_t)g, (uint8_t)b);
-			GP_PutPixel_Raw_24BPP(dst, i, j, pix);
+			GP_PutPixel_Raw_24BPP(res, i, j, pix);
    	}
    }
+}
+
+void GP_FilterResize_Raw(GP_Context *src, GP_Context *res,
+                         GP_ProgressCallback callback,
+                         GP_InterpolationType type)
+{
+	switch (type) {
+	case GP_INTER_NN:
+		GP_FilterInterpolate_NN(src, res, callback);
+	break;
+	case GP_INTER_CUBIC:
+		GP_FilterInterpolate_Cubic(src, res, callback);
+	break;
+	}
+}
+
+GP_Context *GP_FilterResize(GP_Context *src, GP_ProgressCallback callback,
+                            GP_InterpolationType type, GP_Size w, GP_Size h)
+{
+	GP_Context *res;
+	
+	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;
+	}
+
+	GP_FilterResize_Raw(src, res, callback, type);
-	return dst;
+	return res;
 }
http://repo.or.cz/w/gfxprim.git/commit/def6da387aaeaaef3071c0015ec053561da26...
commit def6da387aaeaaef3071c0015ec053561da26780
Author: Cyril Hrubis metan@ucw.cz
Date:   Sun Oct 2 12:27:44 2011 +0200
Remove scale test as demos/grinder serves better.
diff --git a/tests/SDL/Makefile b/tests/SDL/Makefile
index 6d93313..8c02ba1 100644
--- a/tests/SDL/Makefile
+++ b/tests/SDL/Makefile
@@ -6,8 +6,7 @@ INCLUDE=core gfx SDL backends
 LDLIBS+=-lGP -L$(TOPDIR)/build/ -lGP_SDL -lSDL -lpng
APPS=pixeltest fileview fonttest linetest randomshapetest shapetest sierpinsky-     symbolstest textaligntest trianglefps input blittest subcontext scale_test-     showimage
+     symbolstest textaligntest trianglefps input blittest subcontext showimage
include $(TOPDIR)/include.mk
 include $(TOPDIR)/app.mk
diff --git a/tests/SDL/scale_test.c b/tests/SDL/scale_test.c
deleted file mode 100644
index aa026b9..0000000
--- a/tests/SDL/scale_test.c
+++ /dev/null
@@ -1,56 +0,0 @@
-/*****************************************************************************
- * This file is part of gfxprim library.                                     *
- *                                                                           *
- * Gfxprim is free software; you can redistribute it and/or                  *
- * modify it under the terms of the GNU Lesser General Public                *
- * License as published by the Free Software Foundation; either              *
- * version 2.1 of the License, or (at your option) any later version.        *
- *                                                                           *
- * Gfxprim is distributed in the hope that it will be useful,                *
- * but WITHOUT ANY WARRANTY; without even the implied warranty of            *
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU         *
- * Lesser General Public License for more details.                           *
- *                                                                           *
- * You should have received a copy of the GNU Lesser General Public          *
- * License along with gfxprim; if not, write to the Free Software            *
- * Foundation, Inc., 51 Franklin Street, Fifth Floor,                        *
- * Boston, MA  02110-1301  USA                                               *
- *                                                                           *
- * Copyright (C) 2009-2011 Cyril Hrubis metan@ucw.cz                       *
- *                                                                           *
- *****************************************************************************/
-
-#include <stdio.h>
-#include <stdlib.h>
-
-#include "GP.h"
-
-int main(int argc, char *argv[])
-{
-	GP_Context *bitmap;
-	GP_SetDebugLevel(10);
-	GP_RetCode ret;
-	GP_Size w, h;
-
-	if (argc < 4) {
-		fprintf(stderr, "Usage: image w hn");
-		return 1;
-	}
-
-	if ((ret = GP_LoadImage(argv[1], &bitmap))) {
-		fprintf(stderr, "Failed to load bitmap: %sn", GP_RetCodeName(ret));
-		return 1;
-	}
-
-	w = atoi(argv[2]);
-	h = atoi(argv[3]);
-
-	bitmap = GP_Scale_BiCubic(bitmap, w, h);
-
-	if ((ret = GP_SavePPM("out.ppm", bitmap, "b"))) {
-		fprintf(stderr, "Failed to load bitmap: %sn", GP_RetCodeName(ret));
-		return 1;
-	}
-
-	return 0;
-}
-----------------------------------------------------------------------
Summary of changes:
 demos/grinder/grinder.c                     |   51 +++++++-----
 include/filters/{GP_Scale.h => GP_Filter.h} |   46 ++++++-----
 include/filters/GP_Filters.h                |    7 +-
 include/filters/GP_Linear.h                 |   20 ++++-
 include/filters/{GP_Point.h => GP_Resize.h} |   48 ++++++-----
 libs/core/GP_Blit.gen.c.t                   |    2 +-
 libs/filters/GP_Linear.c                    |  114 ++++++++++++++++++++------
 libs/filters/{GP_Scale.c => GP_Resize.c}    |  105 +++++++++++++++----------
 tests/SDL/Makefile                          |    3 +-
 tests/SDL/scale_test.c                      |   56 -------------
 10 files changed, 259 insertions(+), 193 deletions(-)
 rename include/filters/{GP_Scale.h => GP_Filter.h} (72%)
 copy include/filters/{GP_Point.h => GP_Resize.h} (63%)
 rename libs/filters/{GP_Scale.c => GP_Resize.c} (72%)
 delete mode 100644 tests/SDL/scale_test.c
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[Gfxprim] [repo.or.cz] gfxprim.git branch generate updated: 108607fa657f1e25d17ee497bfc1b840f5e9ac0c