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gl: Remove the old unused radial/linear gradients shaders.

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They're dynamically generated now for source/mask.
This commit is contained in:
Eric Anholt 2010-02-17 10:58:16 -08:00
parent 8da843e996
commit f813a0243b
2 changed files with 0 additions and 123 deletions
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6
src/cairo-gl-private.h
View file

@ -313,12 +313,6 @@ create_shader_program (cairo_gl_shader_program_t *program,
const char *vertex_text,
const char *fragment_text);
cairo_status_t
create_linear_gradient_shader_program (cairo_gl_shader_program_t *program);
cairo_status_t
create_radial_gradient_shader_program (cairo_gl_shader_program_t *program);
cairo_status_t
bind_float_to_shader (GLuint program, const char *name,
float value);

117
src/cairo-gl-shaders.c
View file

@ -45,12 +45,6 @@ typedef struct _shader_impl {
void
(*destroy_shader_program) (cairo_gl_shader_program_t *program);
cairo_status_t
(*create_linear_gradient_shader_program) (cairo_gl_shader_program_t *program);
cairo_status_t
(*create_radial_gradient_shader_program) (cairo_gl_shader_program_t *program);
cairo_status_t
(*bind_float_to_shader) (GLuint program, const char *name,
float value);
@ -82,69 +76,6 @@ typedef struct _shader_impl {
static const shader_impl_t*
get_impl (void);
static const char * const minimal_vert_text_110 =
"#version 110\n"
"\n"
"void main ()\n"
"{ gl_Position = ftransform(); }\n";
/* This fragment shader was adapted from Argiris Kirtzidis' cairo-gral
* library, found at git://github.com/akyrtzi/cairo-gral.git. Argiris' shader
* was adapted from the original algorithm in pixman.
*/
static const char * const radial_gradient_frag_text_110 =
"#version 110\n"
"\n"
"uniform sampler1D tex;\n"
"uniform mat4 matrix;\n"
"uniform vec2 circle_1;\n"
"uniform float radius_0;\n"
"uniform float radius_1;\n"
"uniform float first_offset;\n"
"uniform float last_offset;\n"
"\n"
"void main ()\n"
"{\n"
" vec2 pos = (matrix * vec4 (gl_FragCoord.xy, 0.0, 1.0)).xy;\n"
" \n"
" float dr = radius_1 - radius_0;\n"
" float dot_circle_1 = dot (circle_1, circle_1);\n"
" float dot_pos_circle_1 = dot (pos, circle_1);\n"
" \n"
" float A = dot_circle_1 - dr * dr;\n"
" float B = -2.0 * (dot_pos_circle_1 + radius_0 * dr);\n"
" float C = dot (pos, pos) - radius_0 * radius_0;\n"
" float det = B * B - 4.0 * A * C;\n"
" det = max (det, 0.0);\n"
" \n"
" float sqrt_det = sqrt (det);\n"
" /* This complicated bit of logic acts as\n"
" * \"if (A < 0.0) sqrt_det = -sqrt_det\", without the branch.\n"
" */\n"
" sqrt_det *= 1.0 + 2.0 * sign (min (A, 0.0));\n"
" \n"
" float t = (-B + sqrt_det) / (2.0 * A);\n"
" t = (t - first_offset) / (last_offset - first_offset);\n"
" gl_FragColor = texture1D (tex, t);\n"
"}\n";
static const char * const linear_gradient_frag_text_110 =
"#version 110\n"
"\n"
"uniform sampler1D tex;\n"
"uniform mat4 matrix;\n"
"uniform vec2 segment;\n"
"uniform float first_offset;\n"
"uniform float last_offset;\n"
"\n"
"void main ()\n"
"{\n"
" vec2 pos = (matrix * vec4 (gl_FragCoord.xy, 0.0, 1.0)).xy;\n"
" float t = dot (pos, segment) / dot (segment, segment);\n"
" t = (t - first_offset) / (last_offset - first_offset);\n"
" gl_FragColor = texture1D (tex, t);\n"
"}\n";
/* ARB_shader_objects / ARB_vertex_shader / ARB_fragment_shader extensions
API. */
static cairo_status_t
@ -226,22 +157,6 @@ destroy_shader_program_arb (cairo_gl_shader_program_t *program)
glDeleteObjectARB (program->program);
}
static cairo_status_t
create_linear_gradient_shader_program_arb (cairo_gl_shader_program_t *program)
{
return create_shader_program (program,
minimal_vert_text_110,
linear_gradient_frag_text_110);
}
static cairo_status_t
create_radial_gradient_shader_program_arb (cairo_gl_shader_program_t *program)
{
return create_shader_program (program,
minimal_vert_text_110,
radial_gradient_frag_text_110);
}
static cairo_status_t
bind_float_to_shader_arb (GLuint program, const char *name,
float value)
@ -400,22 +315,6 @@ destroy_shader_program_core_2_0 (cairo_gl_shader_program_t *program)
glDeleteProgram (program->program);
}
static cairo_status_t
create_linear_gradient_shader_program_core_2_0 (cairo_gl_shader_program_t *program)
{
return create_shader_program (program,
minimal_vert_text_110,
linear_gradient_frag_text_110);
}
static cairo_status_t
create_radial_gradient_shader_program_core_2_0 (cairo_gl_shader_program_t *program)
{
return create_shader_program (program,
minimal_vert_text_110,
radial_gradient_frag_text_110);
}
static cairo_status_t
bind_float_to_shader_core_2_0 (GLuint program, const char *name,
float value)
@ -501,8 +400,6 @@ static const shader_impl_t shader_impl_core_2_0 = {
compile_shader_core_2_0,
link_shader_core_2_0,
destroy_shader_program_core_2_0,
create_linear_gradient_shader_program_core_2_0,
create_radial_gradient_shader_program_core_2_0,
bind_float_to_shader_core_2_0,
bind_vec2_to_shader_core_2_0,
bind_vec3_to_shader_core_2_0,
@ -516,8 +413,6 @@ static const shader_impl_t shader_impl_arb = {
compile_shader_arb,
link_shader_arb,
destroy_shader_program_arb,
create_linear_gradient_shader_program_arb,
create_radial_gradient_shader_program_arb,
bind_float_to_shader_arb,
bind_vec2_to_shader_arb,
bind_vec3_to_shader_arb,
@ -600,18 +495,6 @@ create_shader_program (cairo_gl_shader_program_t *program,
return CAIRO_INT_STATUS_UNSUPPORTED;
}
cairo_status_t
create_linear_gradient_shader_program (cairo_gl_shader_program_t *program)
{
return get_impl()->create_linear_gradient_shader_program(program);
}
cairo_status_t
create_radial_gradient_shader_program (cairo_gl_shader_program_t *program)
{
return get_impl()->create_radial_gradient_shader_program(program);
}
cairo_status_t
bind_float_to_shader (GLuint program, const char *name,
float value)