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Rotation can now zoom in x and y directions separatly; text can be scaled stretched/compressed horizontally.

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git-svn-id: svn://svn.code.sf.net/p/magicseteditor/code/trunk@520 0fc631ac-6414-0410-93d0-97cfa31319b6
This commit is contained in:
twanvl
2007-07-07 16:19:17 +00:00
parent 1646aebc88
commit 9f567a512e
14 changed files with 137 additions and 85 deletions
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src/gfx/resample_text.cpp
+48 -32
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@@ -20,27 +20,62 @@ const int text_scaling = 4;
// Downsamples the red channel of the input image to the alpha channel of the output image
// img_in must be text_scaling times as large as img_out
void downsample_to_alpha(Image& img_in, Image& img_out) {
assert(img_in.GetWidth() == img_out.GetWidth() * text_scaling);
assert(img_in.GetHeight() == img_out.GetHeight() * text_scaling);
// scale in the x direction, this overwrites parts of the input image
Byte* temp = nullptr;
Byte* in = img_in.GetData();
Byte* out = img_in.GetData();
int count = img_out.GetWidth() * img_in.GetHeight();
for (int i = 0 ; i < count ; ++i) {
int total = 0;
for (int j = 0 ; j < text_scaling ; ++j) {
total += in[3 * (j + text_scaling * i)];
// scale in the x direction, this overwrites parts of the input image
if (img_in.GetWidth() == img_out.GetWidth() * text_scaling) {
// no stretching
int count = img_out.GetWidth() * img_in.GetHeight();
for (int i = 0 ; i < count ; ++i) {
int total = 0;
for (int j = 0 ; j < text_scaling ; ++j) {
total += in[3 * (j + text_scaling * i)];
}
out[i] = total / text_scaling;
}
out[i] = total / text_scaling;
} else {
// resample to buffer
temp = new Byte[img_out.GetWidth() * img_in.GetHeight()];
out = temp;
// custom stretch, see resample_image.cpp
const int shift = 32-12-8; // => max size = 4096, max alpha = 255
int w1 = img_in.GetWidth(), w2 = img_out.GetWidth(), h = img_in.GetHeight();
int out_fact = (w2 << shift) / w1; // how much to output for 256 input = 1 pixel
int out_rest = (w2 << shift) % w1;
for (int y = 0 ; y < h ; ++y) {
int in_rem = out_fact + out_rest;
for (int x = 0 ; x < w2 ; ++x) {
int out_rem = 1 << shift;
int tot = 0;
while (out_rem >= in_rem) {
// eat a whole input pixel
tot += *in * in_rem;
out_rem -= in_rem;
in_rem = out_fact;
in += 3;
}
if (out_rem > 0) {
// eat a partial input pixel
tot += *in * out_rem;
in_rem -= out_rem;
}
// store
*out = tot >> shift;
out += 1;
}
}
in = temp;
}
// now scale in the y direction, and write to the output alpha
img_out.InitAlpha();
out = img_out.GetAlpha();
out = img_out.GetAlpha();
int line_size = img_out.GetWidth();
for (int y = 0 ; y < img_out.GetHeight() ; ++y) {
for (int x = 0 ; x < img_out.GetWidth() ; ++x) {
for (int x = 0 ; x < line_size ; ++x) {
int total = 0;
for (int j = 0 ; j < text_scaling ; ++j) {
total += in[x + line_size * (j + text_scaling * y)];
@@ -49,26 +84,7 @@ void downsample_to_alpha(Image& img_in, Image& img_out) {
}
}
/*
img_out.InitAlpha();
Byte* in = img_in.GetData();
Byte* out = img_out.GetAlpha();
int w = img_out.GetWidth(), h = img_out.GetHeight();
int line_size = 3 * w * text_scaling;
for (int y = 0 ; y < h ; ++y) {
for (int x = 0 ; x < w ; ++x) {
int total = 0;
for (int i = 0 ; i < text_scaling ; ++i) {
for (int j = 0 ; j < text_scaling ; ++j) {
total += in[3*j];
}
in += line_size;
}
*out++ = total / (text_scaling * text_scaling);
in += 3 * text_scaling - line_size * text_scaling;
}
in += line_size * (text_scaling - 1);
}*/
delete[] temp;
}
// simple blur
@@ -97,7 +113,7 @@ void blur_image_alpha(Image& img) {
// optionally rotated by an angle
// (w2,h2) = size of text
// (wc,hc) = the corner where drawing should begin, (0,0) for top-left, (1,1) for bottom-right
void draw_resampled_text(DC& dc, const RealRect& rect, int wc, int hc, int angle, const String& text, int blur_radius, int repeat) {
void draw_resampled_text(DC& dc, const RealRect& rect, double stretch_x, int wc, int hc, int angle, const String& text, int blur_radius, int repeat) {
// enlarge slightly; some fonts are larger then the GetTextExtent tells us (especially italic fonts)
int w = static_cast<int>(rect.width) + 3 + 2 * blur_radius, h = static_cast<int>(rect.height) + 1 + 2 * blur_radius;
// determine sub-pixel position
@@ -116,7 +132,7 @@ void draw_resampled_text(DC& dc, const RealRect& rect, int wc, int hc, int angle
mdc.SelectObject(wxNullBitmap);
Image img_large = buffer.ConvertToImage();
// step 2. sample down
Image img_small(w, h, false);
Image img_small(stretch_x * w, h, false);
fill_image(img_small, dc.GetTextForeground());
downsample_to_alpha(img_large, img_small);
// blur