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Differential D2440 Diff 8054 source/blender/gpu/shaders/gpu_shader_image_stipple_frag.glsl

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source/blender/gpu/shaders/gpu_shader_image_stipple_frag.glsl

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/* Keep these in sync with GPU_basic_shader.h */
#define STIPPLE_HALFTONE 0
#define STIPPLE_QUARTTONE 1
#define STIPPLE_CHECKER_8PX 2
#define STIPPLE_HEXAGON 3
#define STIPPLE_DIAG_STRIPES 4
#define STIPPLE_DIAG_STRIPES_SWAP 5
#define STIPPLE_S3D_INTERLACE_ROW 6
#define STIPPLE_S3D_INTERLACE_ROW_SWAP 7
#define STIPPLE_S3D_INTERLACE_COLUMN 8
#define STIPPLE_S3D_INTERLACE_COLUMN_SWAP 9
#define STIPPLE_S3D_INTERLACE_CHECKERBOARD 10
#define STIPPLE_S3D_INTERLACE_CHECKERBOARD_SWAP 11
#if __VERSION__ == 120
varying vec2 texCoord_interp;
#define fragColor gl_FragColor
#else
in vec2 texCoord_interp;
out vec4 fragColor;
#define texture2D texture
#endif
uniform sampler2D image;
uniform int stipple_id;
void stipple(in int stipple_mode)
{
/* We have to use mod function and integer casting.
* This can be optimized further with the bitwise operations
* when GLSL 1.3 is supported. */
if (stipple_mode == STIPPLE_HALFTONE ||
stipple_mode == STIPPLE_S3D_INTERLACE_CHECKERBOARD ||
stipple_mode == STIPPLE_S3D_INTERLACE_CHECKERBOARD_SWAP)
{
int result = int(mod(gl_FragCoord.x + gl_FragCoord.y, 2));
bool dis = result == 0;
if (stipple_mode == STIPPLE_S3D_INTERLACE_CHECKERBOARD_SWAP)
dis = !dis;
if (dis)
discard;
}
else if (stipple_mode == STIPPLE_QUARTTONE) {
int mody = int(mod(gl_FragCoord.y, 4));
int modx = int(mod(gl_FragCoord.x, 4));
if (mody == 0) {
if (modx != 2)
discard;
}
else if (mody == 2) {
if (modx != 0)
discard;
}
else
discard;
}
else if (stipple_mode == STIPPLE_CHECKER_8PX) {
int result = int(mod(int(gl_FragCoord.x) / 8 + int(gl_FragCoord.y) / 8, 2));
if (result != 0)
discard;
}
else if (stipple_mode == STIPPLE_DIAG_STRIPES) {
int mody = int(mod(gl_FragCoord.y, 16));
int modx = int(mod(gl_FragCoord.x, 16));
if ((16 - modx > mody && mody > 8 - modx) || mody > 24 - modx)
discard;
}
else if (stipple_mode == STIPPLE_DIAG_STRIPES_SWAP) {
int mody = int(mod(gl_FragCoord.y, 16));
int modx = int(mod(gl_FragCoord.x, 16));
if (!((16 - modx > mody && mody > 8 - modx) || mody > 24 - modx))
discard;
}
else if (stipple_mode == STIPPLE_S3D_INTERLACE_ROW || stipple_mode == STIPPLE_S3D_INTERLACE_ROW_SWAP) {
int result = int(mod(gl_FragCoord.y, 2));
bool dis = result == 0;
if (stipple_mode == STIPPLE_S3D_INTERLACE_ROW_SWAP)
dis = !dis;
if (dis)
discard;
}
else if (stipple_mode == STIPPLE_S3D_INTERLACE_COLUMN || stipple_mode == STIPPLE_S3D_INTERLACE_COLUMN_SWAP) {
int result = int(mod(gl_FragCoord.x, 2));
bool dis = result != 0;
if (stipple_mode == STIPPLE_S3D_INTERLACE_COLUMN_SWAP)
dis = !dis;
if (dis)
discard;
}
else if (stipple_mode == STIPPLE_HEXAGON) {
int mody = int(mod(gl_FragCoord.y, 2));
int modx = int(mod(gl_FragCoord.x, 4));
if (mody != 0) {
if (modx != 1)
discard;
}
else {
if (modx != 3)
discard;
}
}
}
void main()
{
stipple(stipple_id);
fragColor = texture2D(image, texCoord_interp);
fragColor.r = 0.0f;
}