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Added support for disabling shader passes, see #97

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This commit is contained in:
Jarcode
2019-02-04 22:07:26 -08:00
parent bc2db4a415
commit 7c30c4a78a
3 changed files with 72 additions and 49 deletions
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78
render.c
View File

@@ -91,7 +91,7 @@ struct gl_bind {
struct gl_sfbo {
GLuint fbo, tex, shader;
bool valid, nativeonly;
bool indirect, nativeonly;
const char* name;
struct gl_bind* binds;
size_t binds_sz;
@@ -139,6 +139,7 @@ static GLuint shaderload(const char* rpath,
struct request_handler* handlers,
int shader_version,
bool raw,
bool* skipped,
struct gl_data* gl) {
size_t s_len = strlen(shader);
@@ -218,14 +219,33 @@ static GLuint shaderload(const char* rpath,
if (ret == GL_FALSE) {
glGetShaderiv(s, GL_INFO_LOG_LENGTH, &ilen);
if (ilen) {
GLchar ebuf[ilen];
GLchar* ebuf = malloc(sizeof(GLchar) * ilen);
glGetShaderInfoLog(s, ilen, NULL, ebuf);
/* check for `#error __disablestage` and flag `*skipped` accordingly */
if (skipped != NULL) {
bool last = false;
static const char* skip_keyword = "__disablestage";
size_t sksz = sizeof(skip_keyword);
for(size_t t = 0; t < (size_t) ilen; ++t) {
if (ebuf[t] == '_') {
if (last && !strncmp(ebuf + t - 1, skip_keyword, sksz)) {
*skipped = true;
goto free_ebuf;
} else last = true;
} else last = false;
}
}
fprintf(stderr, "Shader compilation failed for '%s':\n", path);
fwrite(ebuf, sizeof(GLchar), ilen - 1, stderr);
#ifdef GLAVA_DEBUG
fprintf(stderr, "Processed shader source for '%s':\n", path);
fwrite(buf, sizeof(GLchar), sl, stderr);
#endif
free_ebuf:
free(ebuf);
return 0;
} else {
fprintf(stderr, "Shader compilation failed for '%s', but no info was available\n", path);
@@ -282,14 +302,16 @@ static GLuint shaderlink_f(GLuint* arr) {
}
/* load shaders */
#define shaderbuild(gl, shader_path, c, d, r, v, ...) \
shaderbuild_f(gl, shader_path, c, d, r, v, (const char*[]) {__VA_ARGS__, 0})
#define shaderbuild(gl, shader_path, c, d, r, v, s, ...) \
shaderbuild_f(gl, shader_path, c, d, r, v, s, (const char*[]) {__VA_ARGS__, 0})
static GLuint shaderbuild_f(struct gl_data* gl,
const char* shader_path,
const char* config, const char* defaults,
struct request_handler* handlers,
int shader_version,
bool* skipped,
const char** arr) {
if (skipped) *skipped = false;
const char* str;
int i = 0, sz = 0, t;
while ((str = arr[i++]) != NULL) ++sz;
@@ -303,7 +325,7 @@ static GLuint shaderbuild_f(struct gl_data* gl,
if (!strcmp(path + t + 1, "frag") || !strcmp(path + t + 1, "glsl")) {
if (!(shaders[i] = shaderload(path, GL_FRAGMENT_SHADER,
shader_path, config, defaults, handlers,
shader_version, false, gl))) {
shader_version, false, skipped, gl))) {
return 0;
}
} else if (!strcmp(path + t + 1, "vert")) {
@@ -323,7 +345,7 @@ static GLuint shaderbuild_f(struct gl_data* gl,
}
}
/* load builtin vertex shader */
shaders[sz] = shaderload(NULL, GL_VERTEX_SHADER, VERTEX_SHADER_SRC, NULL, NULL, handlers, shader_version, true, gl);
shaders[sz] = shaderload(NULL, GL_VERTEX_SHADER, VERTEX_SHADER_SRC, NULL, NULL, handlers, shader_version, true, NULL, gl);
fflush(stdout);
return shaderlink_f(shaders);
}
@@ -358,9 +380,9 @@ static void update_1d_tex(GLuint tex, size_t w, float* data) {
/* setup screen framebuffer object and its texture */
static void setup_sfbo(struct gl_sfbo* s, int w, int h) {
GLuint tex = s->valid ? s->tex : ({ glGenTextures(1, &s->tex); s->tex; });
GLuint fbo = s->valid ? s->fbo : ({ glGenFramebuffers(1, &s->fbo); s->fbo; });
s->valid = true;
GLuint tex = s->indirect ? s->tex : ({ glGenTextures(1, &s->tex); s->tex; });
GLuint fbo = s->indirect ? s->fbo : ({ glGenFramebuffers(1, &s->fbo); s->fbo; });
s->indirect = true;
/* bind texture and setup space */
glBindTexture(GL_TEXTURE_2D, tex);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
@@ -1264,20 +1286,22 @@ struct renderer* rd_new(const char** paths, const char* entry,
*s = (struct gl_sfbo) {
.name = strdup(d->d_name),
.shader = 0,
.valid = false,
.indirect = false,
.nativeonly = false,
.binds = malloc(1),
.binds_sz = 0
};
current = s;
GLuint id = shaderbuild(gl, shaders, data, dd, handlers, shader_version, d->d_name);
if (!id) {
bool skip;
GLuint id = shaderbuild(gl, shaders, data, dd, handlers, shader_version, &skip, d->d_name);
if (skip && verbose) printf("disabled: '%s'\n", d->d_name);
if (!id && !skip)
abort();
}
s->shader = id;
if (id) {
/* Only setup a framebuffer and texture if this isn't the final step,
as it can rendered directly */
if (idx != count) {
@@ -1295,6 +1319,7 @@ struct renderer* rd_new(const char** paths, const char* entry,
}
glBindFragDataLocation(id, 1, "fragment");
glUseProgram(0);
}
found = true;
}
@@ -1311,16 +1336,13 @@ struct renderer* rd_new(const char** paths, const char* entry,
{
struct gl_sfbo* final = NULL;
if (!gl->premultiply_alpha) {
for (size_t t = 0; t < gl->stages_sz; ++t) {
if (!gl->stages[t].nativeonly) {
if (gl->stages[t].shader && (gl->premultiply_alpha || !gl->stages[t].nativeonly)) {
final = &gl->stages[t];
}
}
}
/* Invalidate framebuffer and use direct rendering if it was instantiated
due to a following `nativeonly` shader pass. */
if (final) final->valid = false;
/* Use dirct rendering on final pass */
if (final) final->indirect = false;
}
/* Compile smooth pass shader */
@@ -1332,7 +1354,7 @@ struct renderer* rd_new(const char** paths, const char* entry,
char util[usz]; /* module pack path to use */
snprintf(util, usz, "%s/%s", data, util_folder);
loading_smooth_pass = true;
if (!(gl->sm_prog = shaderbuild(gl, util, data, dd, handlers, shader_version, "smooth_pass.frag")))
if (!(gl->sm_prog = shaderbuild(gl, util, data, dd, handlers, shader_version, NULL, "smooth_pass.frag")))
abort();
loading_smooth_pass = false;
}
@@ -1454,7 +1476,7 @@ bool rd_update(struct renderer* r, float* lb, float* rb, size_t bsz, bool modifi
/* Resize screen textures if needed */
if (ww != gl->lww || wh != gl->lwh) {
for (t = 0; t < gl->stages_sz; ++t) {
if (gl->stages[t].valid) {
if (gl->stages[t].indirect) {
setup_sfbo(&gl->stages[t], ww, wh);
}
}
@@ -1483,16 +1505,16 @@ bool rd_update(struct renderer* r, float* lb, float* rb, size_t bsz, bool modifi
/* Current shader program */
struct gl_sfbo* current = &gl->stages[t];
if (current->nativeonly && !gl->premultiply_alpha)
if (!current->shader || (current->nativeonly && !gl->premultiply_alpha))
continue;
/* Bind framebuffer if this is not the final pass */
if (current->valid)
if (current->indirect)
glBindFramebuffer(GL_FRAMEBUFFER, current->fbo);
glClear(GL_COLOR_BUFFER_BIT);
if (!current->valid && gl->copy_desktop) {
if (!current->indirect && gl->copy_desktop) {
/* Self-contained code for drawing background image */
static GLuint bg_prog, bg_utex, bg_screen;
static bool setup = false;
@@ -1509,9 +1531,9 @@ bool rd_update(struct renderer* r, float* lb, float* rb, size_t bsz, bool modifi
"}" "\n";
if (!setup) {
bg_prog = shaderlink(shaderload(NULL, GL_VERTEX_SHADER, VERTEX_SHADER_SRC,
NULL, NULL, NULL, 330, true, gl),
NULL, NULL, NULL, 330, true, NULL, gl),
shaderload(NULL, GL_FRAGMENT_SHADER, frag_shader,
NULL, NULL, NULL, 330, true, gl));
NULL, NULL, NULL, 330, true, NULL, gl));
bg_utex = glGetUniformLocation(bg_prog, "tex");
bg_screen = glGetUniformLocation(bg_prog, "screen");
glBindFragDataLocation(bg_prog, 1, "fragment");
@@ -1629,7 +1651,7 @@ bool rd_update(struct renderer* r, float* lb, float* rb, size_t bsz, bool modifi
/* Return state */
glUseProgram(current->shader);
if (current->valid)
if (current->indirect)
glBindFramebuffer(GL_FRAMEBUFFER, current->fbo);
else
glBindFramebuffer(GL_FRAMEBUFFER, 0);
@@ -1668,7 +1690,7 @@ bool rd_update(struct renderer* r, float* lb, float* rb, size_t bsz, bool modifi
drawoverlay(&gl->overlay); /* Fullscreen quad (actually just two triangles) */
/* Reset some state */
if (current->valid)
if (current->indirect)
glBindFramebuffer(GL_FRAMEBUFFER, 0);
glUseProgram(0);

7
shaders/graph.glsl
View File

@@ -14,11 +14,8 @@
/* 1 to draw edge highlight, 0 to disable */
#define DRAW_HIGHLIGHT 1
/* Whether to anti-alias the border of the graph, creating a smoother curve.
This may have a small impact on performance. Note that this only anti-aliases
the border, so that the seams between the graph and the outline and/or the
highlight (if present) will not be aliased.
Note: This requires `xroot` transparency to be enabled since it
relies on alpha blending with the background. */
This may have a small impact on performance.
Note: requires `xroot` or `none` opacity to be set */
#define ANTI_ALIAS 0
/* outline color */
#define OUTLINE #262626

4
shaders/graph/3.frag
View File

@@ -12,6 +12,10 @@ out vec4 fragment; /* output */
#include "@graph.glsl"
#include ":graph.glsl"
#if ANTI_ALIAS == 0
#error __disablestage
#endif
/* Moves toward the border of the graph, gives the
y coordinate of the last colored pixel */
float get_col_height_up(float x, float oy) {