summaryrefslogtreecommitdiff
path: root/src/scene01.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/scene01.c')
-rw-r--r--src/scene01.c248
1 files changed, 131 insertions, 117 deletions
diff --git a/src/scene01.c b/src/scene01.c
index 80cbae2..b817e71 100644
--- a/src/scene01.c
+++ b/src/scene01.c
@@ -24,130 +24,129 @@ typedef float t_mat4x4[16];
static inline void mat4x4_ortho( t_mat4x4 out, float left, float right, float bottom, float top, float znear, float zfar )
{
- #define T(a, b) (a * 4 + b)
+ #define T(a, b) (a * 4 + b)
- out[T(0,0)] = 2.0f / (right - left);
- out[T(0,1)] = 0.0f;
- out[T(0,2)] = 0.0f;
- out[T(0,3)] = 0.0f;
+ out[T(0,0)] = 2.0f / (right - left);
+ out[T(0,1)] = 0.0f;
+ out[T(0,2)] = 0.0f;
+ out[T(0,3)] = 0.0f;
- out[T(1,1)] = 2.0f / (top - bottom);
- out[T(1,0)] = 0.0f;
- out[T(1,2)] = 0.0f;
- out[T(1,3)] = 0.0f;
+ out[T(1,1)] = 2.0f / (top - bottom);
+ out[T(1,0)] = 0.0f;
+ out[T(1,2)] = 0.0f;
+ out[T(1,3)] = 0.0f;
- out[T(2,2)] = -2.0f / (zfar - znear);
- out[T(2,0)] = 0.0f;
- out[T(2,1)] = 0.0f;
- out[T(2,3)] = 0.0f;
+ out[T(2,2)] = -2.0f / (zfar - znear);
+ out[T(2,0)] = 0.0f;
+ out[T(2,1)] = 0.0f;
+ out[T(2,3)] = 0.0f;
- out[T(3,0)] = -(right + left) / (right - left);
- out[T(3,1)] = -(top + bottom) / (top - bottom);
- out[T(3,2)] = -(zfar + znear) / (zfar - znear);
- out[T(3,3)] = 1.0f;
+ out[T(3,0)] = -(right + left) / (right - left);
+ out[T(3,1)] = -(top + bottom) / (top - bottom);
+ out[T(3,2)] = -(zfar + znear) / (zfar - znear);
+ out[T(3,3)] = 1.0f;
- #undef T
+ #undef T
}
static const char * vertex_shader =
- "#version 130\n"
- "in vec2 i_position;\n"
- "in vec4 i_color;\n"
- "out vec4 v_color;\n"
- "uniform mat4 u_projection_matrix;\n"
- "void main() {\n"
- " v_color = i_color;\n"
- " gl_Position = u_projection_matrix * vec4( i_position, 0.0, 1.0 );\n"
- "}\n";
+ "#version 130\n"
+ "in vec2 i_position;\n"
+ "in vec4 i_color;\n"
+ "out vec4 v_color;\n"
+ "uniform mat4 u_projection_matrix;\n"
+ "void main() {\n"
+ " v_color = i_color;\n"
+ " gl_Position = u_projection_matrix * vec4( i_position, 0.0, 1.0 );\n"
+ "}\n";
static const char * fragment_shader =
- "#version 130\n"
- "in vec4 v_color;\n"
- "out vec4 o_color;\n"
- "void main() {\n"
- " o_color = v_color;\n"
- "}\n";
+ "#version 130\n"
+ "in vec4 v_color;\n"
+ "out vec4 o_color;\n"
+ "void main() {\n"
+ " o_color = v_color;\n"
+ "}\n";
typedef enum t_attrib_id
{
- attrib_position,
- attrib_color
+ attrib_position,
+ attrib_color
} t_attrib_id;
int scene01_init(graphical_env_t *ge, scene01_env_t *se) {
- int width = 256, height = 256;
- GLuint vs, fs, program;
-
- vs = glCreateShader( GL_VERTEX_SHADER );
- fs = glCreateShader( GL_FRAGMENT_SHADER );
-
- int length = strlen( vertex_shader );
- glShaderSource( vs, 1, ( const GLchar ** )&vertex_shader, &length );
- glCompileShader( vs );
-
- GLint status;
- glGetShaderiv( vs, GL_COMPILE_STATUS, &status );
- if( status == GL_FALSE )
- {
- fprintf( stderr, "vertex shader compilation failed\n" );
- return 1;
- }
-
- length = strlen( fragment_shader );
- glShaderSource( fs, 1, ( const GLchar ** )&fragment_shader, &length );
- glCompileShader( fs );
-
- glGetShaderiv( fs, GL_COMPILE_STATUS, &status );
- if( status == GL_FALSE )
- {
- fprintf( stderr, "fragment shader compilation failed\n" );
- return 1;
- }
-
- program = glCreateProgram();
- glAttachShader( program, vs );
- glAttachShader( program, fs );
-
- glBindAttribLocation( program, attrib_position, "i_position" );
- glBindAttribLocation( program, attrib_color, "i_color" );
- glLinkProgram( program );
-
- glUseProgram( program );
-
- glDisable( GL_DEPTH_TEST );
- //glClearColor( 0.5, 0.0, 0.0, 0.0 );
- glClearColor( 0.5, 0.5, 0.0, 0.0 );
- glViewport( 0, 0, width, height );
-
- GLuint vbo;
-
- glGenVertexArrays( 1, &(se->vao) );
- glGenBuffers( 1, &vbo );
- glBindVertexArray( se->vao );
- glBindBuffer( GL_ARRAY_BUFFER, vbo );
-
- glEnableVertexAttribArray( attrib_position );
- glEnableVertexAttribArray( attrib_color );
-
- glVertexAttribPointer( attrib_color, 4, GL_FLOAT, GL_FALSE, sizeof( float ) * 6, 0 );
- glVertexAttribPointer( attrib_position, 2, GL_FLOAT, GL_FALSE, sizeof( float ) * 6, ( void * )(4 * sizeof(float)) );
-
- const GLfloat g_vertex_buffer_data[] = {
- /* R, G, B, A, X, Y */
- 1, 0, 0, 1, 0, 0,
- 0, 1, 0, 1, width, 0,
- 0, 0, 1, 1, width, height,
-
- 1, 0, 0, 1, 0, 0,
- 0, 0, 1, 1, width, height,
- 1, 1, 1, 1, 0, height
- };
-
- glBufferData( GL_ARRAY_BUFFER, sizeof( g_vertex_buffer_data ), g_vertex_buffer_data, GL_STATIC_DRAW );
-
- t_mat4x4 projection_matrix;
- mat4x4_ortho( projection_matrix, 0.0f, (float)width, (float)height, 0.0f, 0.0f, 100.0f );
- glUniformMatrix4fv( glGetUniformLocation( program, "u_projection_matrix" ), 1, GL_FALSE, projection_matrix );
+ GLuint vs, fs, program;
+
+ vs = glCreateShader( GL_VERTEX_SHADER );
+ fs = glCreateShader( GL_FRAGMENT_SHADER );
+
+ int length = strlen( vertex_shader );
+ glShaderSource( vs, 1, ( const GLchar ** )&vertex_shader, &length );
+ glCompileShader( vs );
+
+ GLint status;
+ glGetShaderiv( vs, GL_COMPILE_STATUS, &status );
+ if( status == GL_FALSE )
+ {
+ fprintf( stderr, "vertex shader compilation failed\n" );
+ return 1;
+ }
+
+ length = strlen( fragment_shader );
+ glShaderSource( fs, 1, ( const GLchar ** )&fragment_shader, &length );
+ glCompileShader( fs );
+
+ glGetShaderiv( fs, GL_COMPILE_STATUS, &status );
+ if( status == GL_FALSE )
+ {
+ fprintf( stderr, "fragment shader compilation failed\n" );
+ return 1;
+ }
+
+ program = glCreateProgram();
+ glAttachShader( program, vs );
+ glAttachShader( program, fs );
+
+ glBindAttribLocation( program, attrib_position, "i_position" );
+ glBindAttribLocation( program, attrib_color, "i_color" );
+ glLinkProgram( program );
+
+ glUseProgram( program );
+
+ glDisable( GL_DEPTH_TEST );
+ //glClearColor( 0.5, 0.0, 0.0, 0.0 );
+ glClearColor( 0.5, 0.5, 0.0, 0.0 );
+ glViewport( 0, 0, FBUF_W, FBUF_H );
+
+ GLuint vbo;
+
+ glGenVertexArrays( 1, &(se->vao) );
+ glGenBuffers( 1, &vbo );
+ glBindVertexArray( se->vao );
+ glBindBuffer( GL_ARRAY_BUFFER, vbo );
+
+ glEnableVertexAttribArray( attrib_position );
+ glEnableVertexAttribArray( attrib_color );
+
+ glVertexAttribPointer( attrib_color, 4, GL_FLOAT, GL_FALSE, sizeof( float ) * 6, 0 );
+ glVertexAttribPointer( attrib_position, 2, GL_FLOAT, GL_FALSE, sizeof( float ) * 6, ( void * )(4 * sizeof(float)) );
+
+ const GLfloat g_vertex_buffer_data[] = {
+ /* R, G, B, A, X, Y */
+ 1, 0, 0, 1, 0, 0,
+ 0, 1, 0, 1, FBUF_W, 0,
+ 0, 0, 1, 1, FBUF_W, FBUF_H,
+
+ 1, 0, 0, 1, 0, 0,
+ 0, 0, 1, 1, FBUF_W, FBUF_H,
+ 1, 1, 1, 1, 0, FBUF_H
+ };
+
+ glBufferData( GL_ARRAY_BUFFER, sizeof( g_vertex_buffer_data ), g_vertex_buffer_data, GL_STATIC_DRAW );
+
+ t_mat4x4 projection_matrix;
+ mat4x4_ortho( projection_matrix, 0.0f, (float)FBUF_W, (float)FBUF_H, 0.0f, 0.0f, 100.0f );
+ glUniformMatrix4fv( glGetUniformLocation( program, "u_projection_matrix" ), 1, GL_FALSE, projection_matrix );
return 0;
}
@@ -155,35 +154,50 @@ void scene01_free(graphical_env_t *ge, scene01_env_t *se) {
//FIXME scene00 cannot be rendered coorectly after scene01_init done once
}
-int scene01_next(graphical_env_t *ge, scene01_env_t *se) {
+int scene01_next_gl(graphical_env_t *ge, scene01_env_t *se) {
// Shorthands
caca_canvas_t *cv = ge->cv;
int w = ge->w, h = ge->h;
- Uint32 frame = ge->sc_framecount;
SDL_Renderer *r = ge->sdl_rndr;
- // Locals
+ // Local vars
int res;
+ // https://gist.github.com/Twinklebear/8265888
+ // https://forums.libsdl.org/viewtopic.php?p=51634
+
// Render all the stuff on target texture
- //SDL_SetRenderTarget(r, ge->sdl_target);
+ SDL_SetRenderTarget(r, ge->sdl_target);
glClear( GL_COLOR_BUFFER_BIT );
glBindVertexArray( se->vao );
glDrawArrays( GL_TRIANGLES, 0, 6 );
- SDL_GL_SwapWindow( ge->sdl_win );
// Copy the SDL screen to SDL debug window (and display it, not mandatory)
- //SDL_SetRenderTarget(r, NULL);
- //SDL_RenderCopy(r, ge->sdl_target, NULL, NULL);
- //SDL_RenderPresent(r);
+ SDL_SetRenderTarget(r, NULL);
+ SDL_RenderCopy(r, ge->sdl_target, NULL, NULL);
+ SDL_RenderPresent(r);
// Download the rendered texture from videocard to main memory
+ SDL_SetRenderTarget(r, ge->sdl_target);
res = SDL_RenderReadPixels(r, NULL, 0, ge->raw_target, 256*4);
// "convert" the raw pixel stream to ASCII art on caca canevas
- caca_set_dither_gamma(ge->d, (100-frame%100)/100.0);
+ caca_set_dither_gamma(ge->d, 1.0);
if ( res == 0 ) caca_dither_bitmap(cv, 0, 0, w, h, ge->d, ge->raw_target);
+ return 0;
+}
+
+int scene01_next_sdl(graphical_env_t *ge, scene01_env_t *se) {
+ return 0;
+}
+
+int scene01_next_caca(graphical_env_t *ge, scene01_env_t *se) {
+ // Shorthands
+ caca_canvas_t *cv = ge->cv;
+ int w = ge->w, h = ge->h;
+ Uint32 frame = ge->sc_framecount;
+
caca_set_color_ansi(cv, CACA_WHITE, CACA_BLACK);
caca_put_str(cv, (w-17)/2, h/2, "This is a message");
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-18 16:58:48 +0000