diff options
Diffstat (limited to 'source/blender/gpu/shaders/gpu_shader_basic_frag.glsl')
| -rw-r--r-- | source/blender/gpu/shaders/gpu_shader_basic_frag.glsl | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/source/blender/gpu/shaders/gpu_shader_basic_frag.glsl b/source/blender/gpu/shaders/gpu_shader_basic_frag.glsl index 94c73d9e248..7b4df51c12d 100644 --- a/source/blender/gpu/shaders/gpu_shader_basic_frag.glsl +++ b/source/blender/gpu/shaders/gpu_shader_basic_frag.glsl @@ -12,6 +12,20 @@ #define NUM_SOLID_LIGHTS 3 #define NUM_SCENE_LIGHTS 8 +/* 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 defined(USE_SOLID_LIGHTING) || defined(USE_SCENE_LIGHTING) varying vec3 varying_normal; @@ -29,8 +43,90 @@ varying vec2 varying_texture_coord; uniform sampler2D texture_map; #endif +#ifdef USE_STIPPLE +uniform int stipple_id; +#endif + void main() { +#if defined(USE_STIPPLE) + /* 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_id == STIPPLE_HALFTONE || + stipple_id == STIPPLE_S3D_INTERLACE_CHECKERBOARD || + stipple_id == STIPPLE_S3D_INTERLACE_CHECKERBOARD_SWAP) + { + int result = int(mod(gl_FragCoord.x + gl_FragCoord.y, 2)); + bool dis = result == 0; + if (stipple_id == STIPPLE_S3D_INTERLACE_CHECKERBOARD_SWAP) + dis = !dis; + if (dis) + discard; + } + else if (stipple_id == 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_id == 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_id == 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_id == 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_id == STIPPLE_S3D_INTERLACE_ROW || stipple_id == STIPPLE_S3D_INTERLACE_ROW_SWAP) { + int result = int(mod(gl_FragCoord.y, 2)); + bool dis = result == 0; + if (stipple_id == STIPPLE_S3D_INTERLACE_ROW_SWAP) + dis = !dis; + if (dis) + discard; + } + else if (stipple_id == STIPPLE_S3D_INTERLACE_COLUMN || stipple_id == STIPPLE_S3D_INTERLACE_COLUMN_SWAP) { + int result = int(mod(gl_FragCoord.x, 2)); + bool dis = result != 0; + if (stipple_id == STIPPLE_S3D_INTERLACE_COLUMN_SWAP) + dis = !dis; + if (dis) + discard; + } + else if (stipple_id == 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; + } + } + + +#endif + #if defined(USE_SOLID_LIGHTING) || defined(USE_SCENE_LIGHTING) /* compute normal */ vec3 N = normalize(varying_normal); |