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Use constant VBO for quad, add matrix stuff

This commit is contained in:
Drew DeVault 2017-06-07 21:35:07 -04:00
parent cda12a3eda
commit fc1dc1b5b0
8 changed files with 156 additions and 28 deletions
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1
CMakeLists.txt
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@ -63,5 +63,6 @@ add_subdirectory(backend)
add_subdirectory(common)
add_subdirectory(types)
add_subdirectory(session)
add_subdirectory(render)
add_subdirectory(example)

1
example/CMakeLists.txt
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@ -20,4 +20,5 @@ add_executable(rotation
target_link_libraries(rotation
wlr-backend
wlr-session
wlr-render
)

72
example/rotation.c
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@ -8,6 +8,7 @@
#include <wayland-server.h>
#include <wayland-server-protocol.h>
#include <GLES3/gl3.h>
#include <wlr/render/matrix.h>
#include <wlr/backend.h>
#include <wlr/session.h>
#include <wlr/types.h>
@ -15,29 +16,24 @@
#include "cat.h"
static const GLchar vert_src[] =
"#version 310 es\n"
"precision mediump float;\n"
"layout(location = 0) uniform mat4 transform;\n"
"layout(location = 0) in vec2 pos;\n"
"layout(location = 1) in vec2 texcoord;\n"
"out vec2 v_texcoord;\n"
"uniform mat4 proj;\n"
"attribute vec2 pos;\n"
"attribute vec2 texcoord;\n"
"varying vec2 v_texcoord;\n"
"void main() {\n"
" gl_Position = proj * vec4(pos, 0.0, 1.0);\n"
" v_texcoord = texcoord;\n"
" gl_Position = transform * vec4(pos, 0.0, 1.0);\n"
"}\n";
static const GLchar frag_src[] =
"#version 310 es\n"
"precision mediump float;\n"
"in vec2 v_texcoord;\n"
"out vec4 color;\n"
"uniform sampler2D texture0;\n"
"varying vec2 v_texcoord;\n"
"uniform sampler2D tex;\n"
"void main() {\n"
" color = texture(texture0, v_texcoord);\n"
" gl_FragColor = texture2D(tex, v_texcoord);\n"
"}\n";
struct state {
struct timespec last_frame;
struct wl_listener output_add;
struct wl_listener output_remove;
struct wl_list outputs;
@ -53,10 +49,13 @@ struct state {
};
struct output_state {
struct timespec last_frame;
struct wl_list link;
struct wlr_output *output;
struct state *state;
struct wl_listener frame;
float x, y;
float vel_x, vel_y;
};
struct output_config {
@ -120,14 +119,6 @@ static void init_gl(struct gl *gl) {
0, 0, 0, 0, // top left
0, 1, 0, 1, // bottom left
};
// Temporary
for (size_t i = 0; i < sizeof(verticies) / sizeof(verticies[0]); i += 4) {
verticies[i] *= 128.0f;
verticies[i + 1] *= 128.0f;
verticies[i] += 128;
verticies[i + 1] += 128;
}
// End temp
GLuint indicies[] = {
0, 1, 3,
1, 2, 3,
@ -164,14 +155,16 @@ static void cleanup_gl(struct gl *gl) {
static void output_frame(struct wl_listener *listener, void *data) {
struct output_state *ostate = wl_container_of(listener, ostate, frame);
struct wlr_output *output = ostate->output;
struct state *s = ostate->state;
glClearColor(0, 0, 0, 1);
glClearColor(0.25f, 0.25f, 0.25f, 1);
glClear(GL_COLOR_BUFFER_BIT);
int32_t width = ostate->output->width;
int32_t height = ostate->output->height;
int32_t width = output->width;
int32_t height = output->height;
glViewport(0, 0, width, height);
wlr_output_effective_resolution(output, &width, &height);
glUseProgram(s->gl.prog);
@ -183,13 +176,33 @@ static void output_frame(struct wl_listener *listener, void *data) {
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glUniformMatrix4fv(0, 1, GL_TRUE, ostate->output->transform_matrix);
float world[16], final[16];
wlr_matrix_identity(&final);
wlr_matrix_translate(&world, ostate->x, ostate->y, 0);
wlr_matrix_mul(&final, &world, &final);
wlr_matrix_scale(&world, 128, 128, 1);
wlr_matrix_mul(&final, &world, &final);
wlr_matrix_mul(&output->transform_matrix, &final, &final);
glUniformMatrix4fv(0, 1, GL_TRUE, final);
glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, 0);
struct timespec now;
clock_gettime(CLOCK_MONOTONIC, &now);
s->last_frame = now;
long ms = (now.tv_sec - ostate->last_frame.tv_sec) * 1000 +
(now.tv_nsec - ostate->last_frame.tv_nsec) / 1000000;
float seconds = ms / 1000.0f;
ostate->x += ostate->vel_x * seconds;
ostate->y += ostate->vel_y * seconds;
if (ostate->y > height - 128) {
ostate->vel_y = -ostate->vel_y;
} else {
ostate->vel_y += 50 * seconds;
}
if (ostate->x > width - 128 || ostate->x < 0) {
ostate->vel_x = -ostate->vel_x;
}
ostate->last_frame = now;
}
static void output_add(struct wl_listener *listener, void *data) {
@ -201,9 +214,13 @@ static void output_add(struct wl_listener *listener, void *data) {
struct output_state *ostate = calloc(1, sizeof(struct output_state));
clock_gettime(CLOCK_MONOTONIC, &ostate->last_frame);
ostate->output = output;
ostate->state = state;
ostate->frame.notify = output_frame;
ostate->x = ostate->y = 0;
ostate->vel_x = 100;
ostate->vel_y = 0;
struct output_config *conf;
wl_list_for_each(conf, &state->config, link) {
@ -314,7 +331,6 @@ int main(int argc, char *argv[]) {
wl_list_init(&state.config);
wl_list_init(&state.output_add.link);
wl_list_init(&state.output_remove.link);
clock_gettime(CLOCK_MONOTONIC, &state.last_frame);
parse_args(argc, argv, &state.config);
@ -344,7 +360,7 @@ int main(int argc, char *argv[]) {
struct wl_event_source *timer = wl_event_loop_add_timer(event_loop,
timer_done, &done);
wl_event_source_timer_update(timer, 10000);
wl_event_source_timer_update(timer, 30000);
while (!done) {
wl_event_loop_dispatch(event_loop, 0);

10
include/wlr/render/matrix.h Normal file
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@ -0,0 +1,10 @@
#ifndef _WLR_RENDER_MATRIX_H
#define _WLR_RENDER_MATRIX_H
void wlr_matrix_identity(float (*output)[16]);
void wlr_matrix_translate(float (*output)[16], float x, float y, float z);
void wlr_matrix_scale(float (*output)[16], float x, float y, float z);
void wlr_matrix_rotate(float (*output)[16], float radians);
void wlr_matrix_mul(float (*x)[16], float (*y)[16], float (*product)[16]);
#endif

2
include/wlr/types.h
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@ -47,5 +47,7 @@ bool wlr_output_set_mode(struct wlr_output *output,
void wlr_output_transform(struct wlr_output *output,
enum wl_output_transform transform);
void wlr_output_destroy(struct wlr_output *output);
void wlr_output_effective_resolution(struct wlr_output *output,
int *width, int *height);
#endif

3
render/CMakeLists.txt Normal file
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@ -0,0 +1,3 @@
add_library(wlr-render STATIC
matrix.c
)

83
render/matrix.c Normal file
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@ -0,0 +1,83 @@
#include <string.h>
#include <math.h>
#include <wlr/render/matrix.h>
/* Obtains the index for the given row/column */
static inline int mind(int row, int col) {
return (row - 1) * 4 + col - 1;
}
void wlr_matrix_identity(float (*output)[16]) {
static const float identity[16] = {
1.0f, 0.0f, 0.0f, 0.0f,
0.0f, 1.0f, 0.0f, 0.0f,
0.0f, 0.0f, 1.0f, 0.0f,
0.0f, 0.0f, 0.0f, 1.0f
};
memcpy(*output, identity, sizeof(identity));
}
void wlr_matrix_translate(float (*output)[16], float x, float y, float z) {
wlr_matrix_identity(output);
(*output)[mind(1, 4)] = x;
(*output)[mind(2, 4)] = y;
(*output)[mind(3, 4)] = z;
}
void wlr_matrix_scale(float (*output)[16], float x, float y, float z) {
wlr_matrix_identity(output);
(*output)[mind(1, 1)] = x;
(*output)[mind(2, 2)] = y;
(*output)[mind(3, 3)] = z;
}
void wlr_matrix_rotate(float (*output)[16], float radians) {
wlr_matrix_identity(output);
float _cos = cosf(radians);
float _sin = sinf(radians);
(*output)[mind(1, 1)] = _cos;
(*output)[mind(1, 2)] = _sin;
(*output)[mind(2, 1)] = -_sin;
(*output)[mind(2, 2)] = _cos;
}
void wlr_matrix_mul(float (*x)[16], float (*y)[16], float (*product)[16]) {
float _product[16] = {
(*x)[mind(1, 1)] * (*y)[mind(1, 1)] + (*x)[mind(1, 2)] * (*y)[mind(2, 1)] +
(*x)[mind(1, 3)] * (*y)[mind(3, 1)] + (*x)[mind(1, 4)] * (*y)[mind(4, 1)],
(*x)[mind(1, 1)] * (*y)[mind(1, 2)] + (*x)[mind(1, 2)] * (*y)[mind(2, 2)] +
(*x)[mind(1, 3)] * (*y)[mind(3, 2)] + (*x)[mind(1, 4)] * (*y)[mind(4, 2)],
(*x)[mind(1, 1)] * (*y)[mind(1, 3)] + (*x)[mind(1, 2)] * (*y)[mind(2, 3)] +
(*x)[mind(1, 3)] * (*y)[mind(3, 3)] + (*x)[mind(1, 4)] * (*y)[mind(4, 3)],
(*x)[mind(1, 1)] * (*y)[mind(1, 4)] + (*x)[mind(1, 2)] * (*y)[mind(2, 4)] +
(*x)[mind(1, 4)] * (*y)[mind(3, 4)] + (*x)[mind(1, 4)] * (*y)[mind(4, 4)],
(*x)[mind(2, 1)] * (*y)[mind(1, 1)] + (*x)[mind(2, 2)] * (*y)[mind(2, 1)] +
(*x)[mind(2, 3)] * (*y)[mind(3, 1)] + (*x)[mind(2, 4)] * (*y)[mind(4, 1)],
(*x)[mind(2, 1)] * (*y)[mind(1, 2)] + (*x)[mind(2, 2)] * (*y)[mind(2, 2)] +
(*x)[mind(2, 3)] * (*y)[mind(3, 2)] + (*x)[mind(2, 4)] * (*y)[mind(4, 2)],
(*x)[mind(2, 1)] * (*y)[mind(1, 3)] + (*x)[mind(2, 2)] * (*y)[mind(2, 3)] +
(*x)[mind(2, 3)] * (*y)[mind(3, 3)] + (*x)[mind(2, 4)] * (*y)[mind(4, 3)],
(*x)[mind(2, 1)] * (*y)[mind(1, 4)] + (*x)[mind(2, 2)] * (*y)[mind(2, 4)] +
(*x)[mind(2, 4)] * (*y)[mind(3, 4)] + (*x)[mind(2, 4)] * (*y)[mind(4, 4)],
(*x)[mind(3, 1)] * (*y)[mind(1, 1)] + (*x)[mind(3, 2)] * (*y)[mind(2, 1)] +
(*x)[mind(3, 3)] * (*y)[mind(3, 1)] + (*x)[mind(3, 4)] * (*y)[mind(4, 1)],
(*x)[mind(3, 1)] * (*y)[mind(1, 2)] + (*x)[mind(3, 2)] * (*y)[mind(2, 2)] +
(*x)[mind(3, 3)] * (*y)[mind(3, 2)] + (*x)[mind(3, 4)] * (*y)[mind(4, 2)],
(*x)[mind(3, 1)] * (*y)[mind(1, 3)] + (*x)[mind(3, 2)] * (*y)[mind(2, 3)] +
(*x)[mind(3, 3)] * (*y)[mind(3, 3)] + (*x)[mind(3, 4)] * (*y)[mind(4, 3)],
(*x)[mind(3, 1)] * (*y)[mind(1, 4)] + (*x)[mind(3, 2)] * (*y)[mind(2, 4)] +
(*x)[mind(3, 4)] * (*y)[mind(3, 4)] + (*x)[mind(3, 4)] * (*y)[mind(4, 4)],
(*x)[mind(4, 1)] * (*y)[mind(1, 1)] + (*x)[mind(4, 2)] * (*y)[mind(2, 1)] +
(*x)[mind(4, 3)] * (*y)[mind(3, 1)] + (*x)[mind(4, 4)] * (*y)[mind(4, 1)],
(*x)[mind(4, 1)] * (*y)[mind(1, 2)] + (*x)[mind(4, 2)] * (*y)[mind(2, 2)] +
(*x)[mind(4, 3)] * (*y)[mind(3, 2)] + (*x)[mind(4, 4)] * (*y)[mind(4, 2)],
(*x)[mind(4, 1)] * (*y)[mind(1, 3)] + (*x)[mind(4, 2)] * (*y)[mind(2, 3)] +
(*x)[mind(4, 3)] * (*y)[mind(3, 3)] + (*x)[mind(4, 4)] * (*y)[mind(4, 3)],
(*x)[mind(4, 1)] * (*y)[mind(1, 4)] + (*x)[mind(4, 2)] * (*y)[mind(2, 4)] +
(*x)[mind(4, 4)] * (*y)[mind(3, 4)] + (*x)[mind(4, 4)] * (*y)[mind(4, 4)],
};
memcpy(*product, _product, sizeof(_product));
}

12
types/wlr_output.c
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@ -100,3 +100,15 @@ void wlr_output_destroy(struct wlr_output *output) {
list_free(output->modes);
free(output);
}
void wlr_output_effective_resolution(struct wlr_output *output,
int *width, int *height) {
// TODO: Scale factor
if (output->transform % 2 == 1) {
*width = output->height;
*height = output->width;
} else {
*width = output->width;
*height = output->height;
}
}