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Check_block_constraints() to check block constraints

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Thomas Bernard 2018-11-28 13:47:56 +01:00
parent 811ae20534
commit 216f18607d
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GPG Key ID: 0FF11B67A5C0863C
1 changed files with 79 additions and 1 deletions
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80
src/buttons_effects.c
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@ -167,6 +167,68 @@ void Menu_tag_colors(char * window_title, byte * table, byte * mode, byte can_ca
}
/// Block Constraint check
///
/// This function count the number of colors in a block and reports errors
/// by marking the pixel in color 17 in layer 2.
/// @param block_width block width
/// @param block_height block height
/// @param max_colors numbers of colors allowed in a block
/// @return the number of constraint errors detected
static int Check_block_constraints(int block_width, int block_height, int max_colors)
{
int x, y, x2, y2;
int error_count = 0;
for (y = 0; y <= Main.image_height - block_height; y += block_height)
{
for (x = 0; x <= Main.image_width - block_width; x += block_width)
{
int count = 0;
byte c[16]; // colors already used in block
for (y2 = 0; y2 < block_height; y2++)
{
for (x2 = 0; x2 < block_width; x2++)
{
int i;
byte col = Main.backups->Pages->Image[0].Pixels[x+x2 + (y+y2)*Main.image_width];
if (col > 15) // forbidden color !
{
if (Main.backups->Pages->Nb_layers < 2)
Button_Layer_add(-1);
Main.backups->Pages->Image[1].Pixels[x+x2 + (y+y2)*Main.image_width] = 17;
error_count++;
continue;
}
// search color in already used ones
for (i = 0; i < count; i++)
{
if (col == c[i])
break;
}
if (i >= count) // not found
{
if (count >= max_colors)
{
// constraint error : add color 17 pixel in layer 2
GFX2_Log(GFX2_INFO, "Check_block_constraints() constraint error at (%d,%d)\n", x+x2, y+y2);
if (Main.backups->Pages->Nb_layers < 2)
Button_Layer_add(-1);
Main.backups->Pages->Image[1].Pixels[x+x2 + (y+y2)*Main.image_width] = 17;
error_count++;
}
else
c[count++] = col;
}
}
}
}
}
return error_count;
}
/// Constaint enforcer/checker
///
/// A call toggles between constraint mode and Layered mode.
@ -190,8 +252,11 @@ void Button_Constraint_mode(void)
return;
}
if (Selected_Constraint_Mode == IMAGE_MODE_MODE5 || Selected_Constraint_Mode == IMAGE_MODE_RASTER)
// now check the constraints on existing pixels
switch (Selected_Constraint_Mode)
{
case IMAGE_MODE_MODE5:
case IMAGE_MODE_RASTER:
// switch to layer mode if needed
if (Main.backups->Pages->Image_mode != IMAGE_MODE_LAYERED)
Switch_layer_mode(IMAGE_MODE_LAYERED);
@ -207,6 +272,19 @@ void Button_Constraint_mode(void)
return;
}
}
break;
case IMAGE_MODE_THOMSON:
Check_block_constraints(8, 1, 2);
break;
case IMAGE_MODE_ZX: /// @todo check color intensities for ZX spectrum
case IMAGE_MODE_C64HIRES:
Check_block_constraints(8, 8, 2);
break;
case IMAGE_MODE_C64MULTI: /// @todo check common background color for C64 Multicolor
Check_block_constraints(4, 8, 4);
break;
default: // nothing to do.
break;
}
/// Setting the palette is done in @ref Button_Constraint_menu (8-bit constraint window)